+/*
+ * PicoDrive
+ * (C) notaz, 2009,2010,2013
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ *
+ * Register map:
+ * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm
+ * a15102 ........ ......SM ? 4002 // intS intM
+ * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint
+ * a15106 ........ F....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb]
+ * a15108 (32bit DREQ src) 4008
+ * a1510c (32bit DREQ dst) 400c
+ * a15110 llllllll llllll00 4010 // DREQ Len
+ * a15112 (16bit FIFO reg) 4012
+ * a15114 0 (16bit VRES clr) 4014
+ * a15116 0 (16bit Vint clr) 4016
+ * a15118 0 (16bit Hint clr) 4018
+ * a1511a .......? .......C (16bit CMD clr) 401a // TV Cm
+ * a1511c 0 (16bit PWM clr) 401c
+ * a1511e 0 ? 401e
+ * a15120 (16 bytes comm) 2020
+ * a15130 (PWM) 2030
+ *
+ * SH2 addr lines:
+ * iii. .cc. ..xx * // Internal, Cs, x
+ *
+ * sh2 map, wait/bus cycles (from docs):
+ * r w
+ * rom 0000000-0003fff 1 -
+ * sys reg 0004000-00040ff 1 1
+ * vdp reg 0004100-00041ff 5 5
+ * vdp pal 0004200-00043ff 5 5
+ * cart 2000000-23fffff 6-15
+ * dram/fb 4000000-401ffff 5-12 1-3
+ * fb ovr 4020000-403ffff
+ * sdram 6000000-603ffff 12 2 (cycles)
+ * d.a. c0000000-?
+ */
#include "../pico_int.h"
#include "../memory.h"
+#include "../../cpu/sh2/compiler.h"
static const char str_mars[] = "MARS";
+void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s;
struct Pico32xMem *Pico32xMem;
-static void bank_switch(int b);
+static void bank_switch_rom_68k(int b);
-#define MSB8(x) ((x) >> 8)
+static void (*m68k_write8_io)(u32 a, u32 d);
+static void (*m68k_write16_io)(u32 a, u32 d);
+
+// addressing byte in 16bit reg
+#define REG8IN16(ptr, offs) ((u8 *)ptr)[(offs) ^ 1]
// poll detection
-#define POLL_THRESHOLD 6
+#define POLL_THRESHOLD 3
-struct poll_det {
- int addr, pc, cnt, flag;
-};
-static struct poll_det m68k_poll, sh2_poll[2];
+static struct {
+ u32 addr, cycles;
+ int cnt;
+} m68k_poll;
-static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 pc, int is_vdp)
+static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
{
- int ret = 0, flag = pd->flag;
-
- if (is_vdp)
- flag <<= 3;
+ int ret = 0;
- if (a - 2 <= pd->addr && pd->addr <= a + 2) { // && pd->pc == pc) {
- pd->cnt++;
- if (pd->cnt > POLL_THRESHOLD) {
- if (!(Pico32x.emu_flags & flag)) {
- elprintf(EL_32X, "%s poll addr %08x @ %06x",
- flag == P32XF_68KPOLL ? "m68k" : (flag == P32XF_MSH2POLL ? "msh2" : "ssh2"), a, pc);
+ if (a - 2 <= m68k_poll.addr && m68k_poll.addr <= a + 2
+ && cycles - m68k_poll.cycles <= 64 && !SekNotPolling)
+ {
+ if (m68k_poll.cnt++ > POLL_THRESHOLD) {
+ if (!(Pico32x.emu_flags & flags)) {
+ elprintf(EL_32X, "m68k poll addr %08x, cyc %u",
+ a, cycles - m68k_poll.cycles);
ret = 1;
}
- Pico32x.emu_flags |= flag;
+ Pico32x.emu_flags |= flags;
}
}
- else
- pd->cnt = 0;
- pd->addr = a;
- pd->pc = pc;
+ else {
+ m68k_poll.cnt = 0;
+ m68k_poll.addr = a;
+ SekNotPolling = 0;
+ }
+ m68k_poll.cycles = cycles;
return ret;
}
-static int p32x_poll_undetect(struct poll_det *pd, int is_vdp)
+void p32x_m68k_poll_event(u32 flags)
{
- int ret = 0, flag = pd->flag;
- if (is_vdp)
- flag <<= 3;
- if (pd->cnt > POLL_THRESHOLD)
- ret = 1;
- pd->addr = pd->cnt = 0;
- Pico32x.emu_flags &= ~flag;
- return ret;
+ if (Pico32x.emu_flags & flags) {
+ elprintf(EL_32X, "m68k poll %02x -> %02x", Pico32x.emu_flags,
+ Pico32x.emu_flags & ~flags);
+ Pico32x.emu_flags &= ~flags;
+ SekSetStop(0);
+ }
+ m68k_poll.addr = m68k_poll.cnt = 0;
+}
+
+static void sh2_poll_detect(SH2 *sh2, u32 a, u32 flags, int maxcnt)
+{
+ int cycles_left = sh2_cycles_left(sh2);
+
+ if (a == sh2->poll_addr && sh2->poll_cycles - cycles_left <= 10) {
+ if (sh2->poll_cnt++ > maxcnt) {
+ if (!(sh2->state & flags))
+ elprintf_sh2(sh2, EL_32X, "state: %02x->%02x",
+ sh2->state, sh2->state | flags);
+
+ sh2->state |= flags;
+ sh2_end_run(sh2, 1);
+ pevt_log_sh2(sh2, EVT_POLL_START);
+ return;
+ }
+ }
+ else
+ sh2->poll_cnt = 0;
+ sh2->poll_addr = a;
+ sh2->poll_cycles = cycles_left;
+}
+
+void p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles)
+{
+ if (sh2->state & flags) {
+ elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", sh2->state,
+ sh2->state & ~flags);
+
+ if (sh2->m68krcycles_done < m68k_cycles)
+ sh2->m68krcycles_done = m68k_cycles;
+
+ pevt_log_sh2_o(sh2, EVT_POLL_END);
+ }
+
+ sh2->state &= ~flags;
+ sh2->poll_addr = sh2->poll_cycles = sh2->poll_cnt = 0;
}
-void p32x_poll_event(int cpu_mask, int is_vdp)
+static void sh2s_sync_on_read(SH2 *sh2)
{
- if (cpu_mask & 1)
- p32x_poll_undetect(&sh2_poll[0], is_vdp);
- if (cpu_mask & 2)
- p32x_poll_undetect(&sh2_poll[1], is_vdp);
+ int cycles;
+ if (sh2->poll_cnt != 0)
+ return;
+
+ cycles = sh2_cycles_done(sh2);
+ if (cycles > 600)
+ p32x_sync_other_sh2(sh2, sh2->m68krcycles_done + cycles / 3);
}
// SH2 faking
//#define FAKE_SH2
-int p32x_csum_faked;
#ifdef FAKE_SH2
+static int p32x_csum_faked;
static const u16 comm_fakevals[] = {
0x4d5f, 0x4f4b, // M_OK
0x535f, 0x4f4b, // S_OK
}
#endif
-// DMAC handling
-static struct {
- unsigned int sar0, dar0, tcr0; // src addr, dst addr, transfer count
- unsigned int chcr0; // chan ctl
- unsigned int sar1, dar1, tcr1; // same for chan 1
- unsigned int chcr1;
- int pad[4];
- unsigned int dmaor;
-} * dmac0;
-
-static void dma_68k2sh2_do(void)
-{
- unsigned short *dreqlen = &Pico32x.regs[0x10 / 2];
- int i;
-
- if (dmac0->tcr0 != *dreqlen)
- elprintf(EL_32X|EL_ANOMALY, "tcr0 and dreq len differ: %d != %d", dmac0->tcr0, *dreqlen);
-
- for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) {
- extern void p32x_sh2_write16(u32 a, u32 d, int id);
- elprintf(EL_32X|EL_ANOMALY, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen);
- p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], 0);
- dmac0->dar0 += 2;
- dmac0->tcr0--;
- (*dreqlen)--;
- }
-
- Pico32x.dmac_ptr = 0; // HACK
- Pico32x.regs[6 / 2] &= ~P32XS_FULL;
- if (*dreqlen == 0)
- Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete
- if (dmac0->tcr0 == 0)
- dmac0->chcr0 |= 2; // DMA has ended normally
-}
-
// ------------------------------------------------------------------
// 68k regs
{
a &= 0x3e;
- if (a == 2) // INTM, INTS
- return ((Pico32x.sh2irqi[0] & P32XI_CMD) >> 4) | ((Pico32x.sh2irqi[1] & P32XI_CMD) >> 3);
#if 0
if ((a & 0x30) == 0x20)
return sh2_comm_faker(a);
#else
- if ((a & 0x30) == 0x20 && p32x_poll_detect(&m68k_poll, a, SekPc, 0)) {
- SekEndRun(16);
+ if ((a & 0x30) == 0x20) {
+ unsigned int cycles = SekCyclesDone();
+ int comreg = 1 << (a & 0x0f) / 2;
+
+ if (cycles - msh2.m68krcycles_done > 244
+ || (Pico32x.comm_dirty & comreg))
+ p32x_sync_sh2s(cycles);
+
+ if (m68k_poll_detect(a, cycles, P32XF_68KCPOLL)) {
+ SekSetStop(1);
+ SekEndRun(16);
+ }
+ goto out;
}
#endif
+ if (a == 2) { // INTM, INTS
+ unsigned int cycles = SekCyclesDone();
+ if (cycles - msh2.m68krcycles_done > 64)
+ p32x_sync_sh2s(cycles);
+ goto out;
+ }
+
if ((a & 0x30) == 0x30)
- return p32x_pwm_read16(a);
+ return p32x_pwm_read16(a, NULL, SekCyclesDone());
+out:
return Pico32x.regs[a / 2];
}
+static void dreq0_write(u16 *r, u32 d)
+{
+ if (!(r[6 / 2] & P32XS_68S)) {
+ elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?");
+ return; // ignored - tested
+ }
+ if (Pico32x.dmac0_fifo_ptr < DMAC_FIFO_LEN) {
+ Pico32x.dmac_fifo[Pico32x.dmac0_fifo_ptr++] = d;
+ if (Pico32x.dmac0_fifo_ptr == DMAC_FIFO_LEN)
+ r[6 / 2] |= P32XS_FULL;
+ // tested: len register decrements and 68S clears
+ // even if SH2s/DMAC aren't active..
+ r[0x10 / 2]--;
+ if (r[0x10 / 2] == 0)
+ r[6 / 2] &= ~P32XS_68S;
+
+ if ((Pico32x.dmac0_fifo_ptr & 3) == 0) {
+ p32x_sync_sh2s(SekCyclesDone());
+ p32x_dreq0_trigger();
+ }
+ }
+ else
+ elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO overflow!");
+}
+
+// writable bits tested
static void p32x_reg_write8(u32 a, u32 d)
{
u16 *r = Pico32x.regs;
// for things like bset on comm port
m68k_poll.cnt = 0;
- if (a == 1 && !(r[0] & 1)) {
- r[0] |= 1;
- Pico32xStartup();
- return;
- }
-
- if (!(r[0] & 1))
- return;
-
switch (a) {
- case 0: // adapter ctl
- r[0] = (r[0] & 0x83) | ((d << 8) & P32XS_FM);
- break;
- case 3: // irq ctl
- if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) {
- Pico32x.sh2irqi[0] |= P32XI_CMD;
- p32x_update_irls();
- SekEndRun(16);
+ case 0x00: // adapter ctl: FM writable
+ REG8IN16(r, 0x00) = d & 0x80;
+ return;
+ case 0x01: // adapter ctl: RES and ADEN writable
+ if ((d ^ r[0]) & d & P32XS_nRES)
+ p32x_reset_sh2s();
+ REG8IN16(r, 0x01) &= ~(P32XS_nRES|P32XS_ADEN);
+ REG8IN16(r, 0x01) |= d & (P32XS_nRES|P32XS_ADEN);
+ return;
+ case 0x02: // ignored, always 0
+ return;
+ case 0x03: // irq ctl
+ if ((d ^ r[0x02 / 2]) & 3) {
+ int cycles = SekCyclesDone();
+ p32x_sync_sh2s(cycles);
+ r[0x02 / 2] = d & 3;
+ p32x_update_cmd_irq(NULL, cycles);
}
- if ((d & 2) && !(Pico32x.sh2irqi[1] & P32XI_CMD)) {
- Pico32x.sh2irqi[1] |= P32XI_CMD;
- p32x_update_irls();
- SekEndRun(16);
+ return;
+ case 0x04: // ignored, always 0
+ return;
+ case 0x05: // bank
+ d &= 3;
+ if (r[0x04 / 2] != d) {
+ r[0x04 / 2] = d;
+ bank_switch_rom_68k(d);
}
- break;
- case 5: // bank
- d &= 7;
- if (r[4 / 2] != d) {
- r[4 / 2] = d;
- bank_switch(d);
+ return;
+ case 0x06: // ignored, always 0
+ return;
+ case 0x07: // DREQ ctl
+ REG8IN16(r, 0x07) &= ~(P32XS_68S|P32XS_DMA|P32XS_RV);
+ if (!(d & P32XS_68S)) {
+ Pico32x.dmac0_fifo_ptr = 0;
+ REG8IN16(r, 0x07) &= ~P32XS_FULL;
}
- break;
- case 7: // DREQ ctl
- r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV));
- break;
+ REG8IN16(r, 0x07) |= d & (P32XS_68S|P32XS_DMA|P32XS_RV);
+ return;
+ case 0x08: // ignored, always 0
+ return;
+ case 0x09: // DREQ src
+ REG8IN16(r, 0x09) = d;
+ return;
+ case 0x0a:
+ REG8IN16(r, 0x0a) = d;
+ return;
+ case 0x0b:
+ REG8IN16(r, 0x0b) = d & 0xfe;
+ return;
+ case 0x0c: // ignored, always 0
+ return;
+ case 0x0d: // DREQ dest
+ case 0x0e:
+ case 0x0f:
+ case 0x10: // DREQ len
+ REG8IN16(r, a) = d;
+ return;
+ case 0x11:
+ REG8IN16(r, a) = d & 0xfc;
+ return;
+ // DREQ FIFO - writes to odd addr go to fifo
+ // do writes to even work? Reads return 0
+ case 0x12:
+ REG8IN16(r, a) = d;
+ return;
+ case 0x13:
+ d = (REG8IN16(r, 0x12) << 8) | (d & 0xff);
+ REG8IN16(r, 0x12) = 0;
+ dreq0_write(r, d);
+ return;
+ case 0x14: // ignored, always 0
+ case 0x15:
+ case 0x16:
+ case 0x17:
+ case 0x18:
+ case 0x19:
+ return;
+ case 0x1a: // what's this?
+ elprintf(EL_32X|EL_ANOMALY, "mystery w8 %02x %02x", a, d);
+ REG8IN16(r, a) = d & 0x01;
+ return;
case 0x1b: // TV
- r[0x1a / 2] = d;
- break;
+ REG8IN16(r, a) = d & 0x01;
+ return;
+ case 0x1c: // ignored, always 0
+ case 0x1d:
+ case 0x1e:
+ case 0x1f:
+ case 0x30:
+ return;
+ case 0x31: // PWM control
+ REG8IN16(r, a) &= ~0x0f;
+ REG8IN16(r, a) |= d & 0x0f;
+ d = r[0x30 / 2];
+ goto pwm_write;
+ case 0x32: // PWM cycle
+ REG8IN16(r, a) = d & 0x0f;
+ d = r[0x32 / 2];
+ goto pwm_write;
+ case 0x33:
+ REG8IN16(r, a) = d;
+ d = r[0x32 / 2];
+ goto pwm_write;
+ // PWM pulse regs.. Only writes to odd address send a value
+ // to FIFO; reads are 0 (except status bits)
+ case 0x34:
+ case 0x36:
+ case 0x38:
+ REG8IN16(r, a) = d;
+ return;
+ case 0x35:
+ case 0x37:
+ case 0x39:
+ d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff);
+ REG8IN16(r, a ^ 1) = 0;
+ goto pwm_write;
+ case 0x3a: // ignored, always 0
+ case 0x3b:
+ case 0x3c:
+ case 0x3d:
+ case 0x3e:
+ case 0x3f:
+ return;
+ pwm_write:
+ p32x_pwm_write16(a & ~1, d, NULL, SekCyclesDone());
+ return;
+ }
+
+ if ((a & 0x30) == 0x20) {
+ int cycles = SekCyclesDone();
+ int comreg;
+
+ if (REG8IN16(r, a) == d)
+ return;
+
+ p32x_sync_sh2s(cycles);
+
+ REG8IN16(r, a) = d;
+ p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
+ p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty |= comreg;
+
+ if (cycles - (int)msh2.m68krcycles_done > 120)
+ p32x_sync_sh2s(cycles);
+ return;
}
}
switch (a) {
case 0x00: // adapter ctl
- r[0] = (r[0] & 0x83) | (d & P32XS_FM);
+ if ((d ^ r[0]) & d & P32XS_nRES)
+ p32x_reset_sh2s();
+ r[0] &= ~(P32XS_FM|P32XS_nRES|P32XS_ADEN);
+ r[0] |= d & (P32XS_FM|P32XS_nRES|P32XS_ADEN);
+ return;
+ case 0x08: // DREQ src
+ r[a / 2] = d & 0xff;
+ return;
+ case 0x0a:
+ r[a / 2] = d & ~1;
+ return;
+ case 0x0c: // DREQ dest
+ r[a / 2] = d & 0xff;
+ return;
+ case 0x0e:
+ r[a / 2] = d;
return;
case 0x10: // DREQ len
r[a / 2] = d & ~3;
return;
case 0x12: // FIFO reg
- if (!(r[6 / 2] & P32XS_68S)) {
- elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?");
- return;
- }
- if (Pico32x.dmac_ptr < DMAC_FIFO_LEN) {
- Pico32x.dmac_fifo[Pico32x.dmac_ptr++] = d;
- if ((Pico32x.dmac_ptr & 3) == 0 && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1))
- dma_68k2sh2_do();
- if (Pico32x.dmac_ptr == DMAC_FIFO_LEN)
- r[6 / 2] |= P32XS_FULL;
- }
- break;
+ dreq0_write(r, d);
+ return;
+ case 0x1a: // TV + mystery bit
+ r[a / 2] = d & 0x0101;
+ return;
+ case 0x30: // PWM control
+ d = (r[a / 2] & ~0x0f) | (d & 0x0f);
+ r[a / 2] = d;
+ p32x_pwm_write16(a, d, NULL, SekCyclesDone());
+ return;
}
- // DREQ src, dst
- if ((a & 0x38) == 0x08) {
- r[a / 2] = d;
- return;
- }
// comm port
- else if ((a & 0x30) == 0x20 && r[a / 2] != d) {
+ if ((a & 0x30) == 0x20) {
+ int cycles = SekCyclesDone();
+ int comreg;
+
+ p32x_sync_sh2s(cycles);
+
r[a / 2] = d;
- if (p32x_poll_undetect(&sh2_poll[0], 0) || p32x_poll_undetect(&sh2_poll[1], 0))
- // if some SH2 is busy waiting, it needs to see the result ASAP
- SekEndRun(16);
+ p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
+ p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty |= comreg;
return;
}
// PWM
else if ((a & 0x30) == 0x30) {
- p32x_pwm_write16(a, d);
+ p32x_pwm_write16(a, d, NULL, SekCyclesDone());
return;
}
// VDP regs
static u32 p32x_vdp_read16(u32 a)
{
+ u32 d;
a &= 0x0e;
- return Pico32x.vdp_regs[a / 2];
+ d = Pico32x.vdp_regs[a / 2];
+ if (a == 0x0a) {
+ // tested: FEN seems to be randomly pulsing on hcnt 0x80-0xf0,
+ // most often at 0xb1-0xb5, even during vblank,
+ // what's the deal with that?
+ // we'll just fake it along with hblank for now
+ Pico32x.vdp_fbcr_fake++;
+ if (Pico32x.vdp_fbcr_fake & 4)
+ d |= P32XV_HBLK;
+ if ((Pico32x.vdp_fbcr_fake & 7) == 0)
+ d |= P32XV_nFEN;
+ }
+ return d;
}
static void p32x_vdp_write8(u32 a, u32 d)
u16 *r = Pico32x.vdp_regs;
a &= 0x0f;
- // for FEN checks between writes
- sh2_poll[0].cnt = 0;
-
// TODO: verify what's writeable
switch (a) {
case 0x01:
Pico32x.dirty_pal = 1;
r[0] = (r[0] & P32XV_nPAL) | (d & 0xff);
break;
+ case 0x03: // shift (for pp mode)
+ r[2 / 2] = d & 1;
+ break;
+ case 0x05: // fill len
+ r[4 / 2] = d & 0xff;
+ break;
case 0x0b:
d &= 1;
Pico32x.pending_fb = d;
// if we are blanking and FS bit is changing
if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) {
- r[0x0a/2] ^= 1;
- Pico32xSwapDRAM(d ^ 1);
+ r[0x0a/2] ^= P32XV_FS;
+ Pico32xSwapDRAM(d ^ 1);
elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS);
}
break;
}
}
-static void p32x_vdp_write16(u32 a, u32 d)
+static void p32x_vdp_write16(u32 a, u32 d, SH2 *sh2)
{
+ a &= 0x0e;
+ if (a == 6) { // fill start
+ Pico32x.vdp_regs[6 / 2] = d;
+ return;
+ }
+ if (a == 8) { // fill data
+ u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
+ int len = Pico32x.vdp_regs[4 / 2] + 1;
+ int len1 = len;
+ a = Pico32x.vdp_regs[6 / 2];
+ while (len1--) {
+ dram[a] = d;
+ a = (a & 0xff00) | ((a + 1) & 0xff);
+ }
+ Pico32x.vdp_regs[0x06 / 2] = a;
+ Pico32x.vdp_regs[0x08 / 2] = d;
+ if (sh2 != NULL && len > 4) {
+ Pico32x.vdp_regs[0x0a / 2] |= P32XV_nFEN;
+ // supposedly takes 3 bus/6 sh2 cycles? or 3 sh2 cycles?
+ p32x_event_schedule_sh2(sh2, P32X_EVENT_FILLEND, 3 + len);
+ }
+ return;
+ }
+
p32x_vdp_write8(a | 1, d);
}
// ------------------------------------------------------------------
// SH2 regs
-static u32 p32x_sh2reg_read16(u32 a, int cpuid)
+static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2)
{
u16 *r = Pico32x.regs;
- a &= 0xfe; // ?
+ a &= 0x3e;
switch (a) {
case 0x00: // adapter/irq ctl
- return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] | Pico32x.sh2irq_mask[cpuid];
- case 0x04: // H count
+ return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0]
+ | Pico32x.sh2irq_mask[sh2->is_slave];
+ case 0x04: // H count (often as comm too)
+ sh2_poll_detect(sh2, a, SH2_STATE_CPOLL, 3);
+ sh2s_sync_on_read(sh2);
return Pico32x.sh2_regs[4 / 2];
+ case 0x06:
+ return (r[a / 2] & ~P32XS_FULL) | 0x4000;
+ case 0x08: // DREQ src
+ case 0x0a:
+ case 0x0c: // DREQ dst
+ case 0x0e:
case 0x10: // DREQ len
return r[a / 2];
+ case 0x12: // DREQ FIFO - does this work on hw?
+ if (Pico32x.dmac0_fifo_ptr > 0) {
+ Pico32x.dmac0_fifo_ptr--;
+ r[a / 2] = Pico32x.dmac_fifo[0];
+ memmove(&Pico32x.dmac_fifo[0], &Pico32x.dmac_fifo[1],
+ Pico32x.dmac0_fifo_ptr * 2);
+ }
+ return r[a / 2];
+ case 0x14:
+ case 0x16:
+ case 0x18:
+ case 0x1a:
+ case 0x1c:
+ return 0; // ?
}
- // DREQ src, dst
- if ((a & 0x38) == 0x08)
- return r[a / 2];
// comm port
if ((a & 0x30) == 0x20) {
- if (p32x_poll_detect(&sh2_poll[cpuid], a, sh2_pc(cpuid), 0))
- ash2_end_run(8);
+ sh2_poll_detect(sh2, a, SH2_STATE_CPOLL, 3);
+ sh2s_sync_on_read(sh2);
return r[a / 2];
}
- if ((a & 0x30) == 0x30) {
- sh2_poll[cpuid].cnt = 0;
- return p32x_pwm_read16(a);
- }
+ if ((a & 0x30) == 0x30)
+ return p32x_pwm_read16(a, sh2, sh2_cycles_done_m68k(sh2));
+ elprintf_sh2(sh2, EL_32X|EL_ANOMALY,
+ "unhandled sysreg r16 [%02x] @%08x", a, sh2_pc(sh2));
return 0;
}
-static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid)
+static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2)
{
- a &= 0xff;
+ u16 *r = Pico32x.regs;
+ u32 old;
+
+ a &= 0x3f;
+ sh2->poll_addr = 0;
+
switch (a) {
- case 0: // FM
- Pico32x.regs[0] &= ~P32XS_FM;
- Pico32x.regs[0] |= (d << 8) & P32XS_FM;
- break;
- case 1: //
- Pico32x.sh2irq_mask[cpuid] = d & 0x8f;
+ case 0x00: // FM
+ r[0] &= ~P32XS_FM;
+ r[0] |= (d << 8) & P32XS_FM;
+ return;
+ case 0x01: // HEN/irq masks
+ old = Pico32x.sh2irq_mask[sh2->is_slave];
+ if ((d ^ old) & 1)
+ p32x_pwm_sync_to_sh2(sh2);
+
+ Pico32x.sh2irq_mask[sh2->is_slave] = d & 0x0f;
Pico32x.sh2_regs[0] &= ~0x80;
Pico32x.sh2_regs[0] |= d & 0x80;
- p32x_update_irls();
- break;
- case 5: // H count
- Pico32x.sh2_regs[4 / 2] = d & 0xff;
- break;
+
+ if ((d ^ old) & 1)
+ p32x_pwm_schedule_sh2(sh2);
+ if ((old ^ d) & 2)
+ p32x_update_cmd_irq(sh2, 0);
+ if ((old ^ d) & 4)
+ p32x_schedule_hint(sh2, 0);
+ return;
+ case 0x04: // ignored?
+ return;
+ case 0x05: // H count
+ d &= 0xff;
+ if (Pico32x.sh2_regs[4 / 2] != d) {
+ Pico32x.sh2_regs[4 / 2] = d;
+ p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(sh2));
+ sh2_end_run(sh2, 4);
+ }
+ return;
+ case 0x30:
+ REG8IN16(r, a) = d & 0x0f;
+ d = r[0x30 / 2];
+ goto pwm_write;
+ case 0x31: // PWM control
+ REG8IN16(r, a) = d & 0x8f;
+ d = r[0x30 / 2];
+ goto pwm_write;
+ case 0x32: // PWM cycle
+ REG8IN16(r, a) = d & 0x0f;
+ d = r[0x32 / 2];
+ goto pwm_write;
+ case 0x33:
+ REG8IN16(r, a) = d;
+ d = r[0x32 / 2];
+ goto pwm_write;
+ // PWM pulse regs.. Only writes to odd address send a value
+ // to FIFO; reads are 0 (except status bits)
+ case 0x34:
+ case 0x36:
+ case 0x38:
+ REG8IN16(r, a) = d;
+ return;
+ case 0x35:
+ case 0x37:
+ case 0x39:
+ d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff);
+ REG8IN16(r, a ^ 1) = 0;
+ goto pwm_write;
+ case 0x3a: // ignored, always 0?
+ case 0x3b:
+ case 0x3c:
+ case 0x3d:
+ case 0x3e:
+ case 0x3f:
+ return;
+ pwm_write:
+ p32x_pwm_write16(a & ~1, d, sh2, 0);
+ return;
+ }
+
+ if ((a & 0x30) == 0x20) {
+ int comreg;
+ if (REG8IN16(r, a) == d)
+ return;
+
+ REG8IN16(r, a) = d;
+ p32x_m68k_poll_event(P32XF_68KCPOLL);
+ p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(sh2));
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty |= comreg;
+ return;
}
+
+ elprintf(EL_32X|EL_ANOMALY,
+ "unhandled sysreg w8 [%02x] %02x @%08x", a, d, sh2_pc(sh2));
}
-static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid)
+static void p32x_sh2reg_write16(u32 a, u32 d, SH2 *sh2)
{
- a &= 0xfe;
+ a &= 0x3e;
+
+ sh2->poll_addr = 0;
// comm
- if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) {
+ if ((a & 0x30) == 0x20) {
+ int comreg;
+ if (Pico32x.regs[a / 2] == d)
+ return;
+
Pico32x.regs[a / 2] = d;
- p32x_poll_undetect(&m68k_poll, 0);
- p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
+ p32x_m68k_poll_event(P32XF_68KCPOLL);
+ p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL,
+ sh2_cycles_done_m68k(sh2));
+ comreg = 1 << (a & 0x0f) / 2;
+ Pico32x.comm_dirty |= comreg;
return;
}
// PWM
else if ((a & 0x30) == 0x30) {
- p32x_pwm_write16(a, d);
+ p32x_pwm_write16(a, d, sh2, sh2_cycles_done_m68k(sh2));
return;
}
Pico32x.regs[0] &= ~P32XS_FM;
Pico32x.regs[0] |= d & P32XS_FM;
break;
- case 0x14: Pico32x.sh2irqs &= ~P32XI_VRES; goto irls;
- case 0x16: Pico32x.sh2irqs &= ~P32XI_VINT; goto irls;
- case 0x18: Pico32x.sh2irqs &= ~P32XI_HINT; goto irls;
- case 0x1a: Pico32x.sh2irqi[cpuid] &= ~P32XI_CMD; goto irls;
- case 0x1c: Pico32x.sh2irqs &= ~P32XI_PWM; goto irls;
+ case 0x14:
+ Pico32x.sh2irqs &= ~P32XI_VRES;
+ goto irls;
+ case 0x16:
+ Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_VINT;
+ goto irls;
+ case 0x18:
+ Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_HINT;
+ goto irls;
+ case 0x1a:
+ Pico32x.regs[2 / 2] &= ~(1 << sh2->is_slave);
+ p32x_update_cmd_irq(sh2, 0);
+ return;
+ case 0x1c:
+ p32x_pwm_sync_to_sh2(sh2);
+ Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_PWM;
+ p32x_pwm_schedule_sh2(sh2);
+ goto irls;
}
- p32x_sh2reg_write8(a | 1, d, cpuid);
+ p32x_sh2reg_write8(a | 1, d, sh2);
return;
irls:
- p32x_update_irls();
+ p32x_update_irls(sh2, 0);
}
// ------------------------------------------------------------------
-// SH2 internal peripherals
-static u32 sh2_peripheral_read8(u32 a, int id)
-{
- u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
- u32 d;
-
- a &= 0x1ff;
- d = r[a];
- if (a == 4)
- d = 0x84; // SCI SSR
-
- elprintf(EL_32X, "%csh2 peri r8 [%08x] %02x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
- return d;
-}
-
-static u32 sh2_peripheral_read32(u32 a, int id)
-{
- u32 d;
- a &= 0x1fc;
- d = Pico32xMem->sh2_peri_regs[id][a / 4];
-
- elprintf(EL_32X, "%csh2 peri r32 [%08x] %08x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
- return d;
-}
-
-static void sh2_peripheral_write8(u32 a, u32 d, int id)
-{
- u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
- elprintf(EL_32X, "%csh2 peri w8 [%08x] %02x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
-
- a &= 0x1ff;
- r[a] = d;
-}
-
-static void sh2_peripheral_write32(u32 a, u32 d, int id)
-{
- unsigned int *r = Pico32xMem->sh2_peri_regs[id];
- elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
-
- a &= 0x1fc;
- r[a / 4] = d;
-
- switch (a) {
- // division unit:
- case 0x104: // DVDNT: divident L, starts divide
- elprintf(EL_32X, "%csh2 divide %08x / %08x", id ? 's' : 'm', d, r[0x100 / 4]);
- if (r[0x100 / 4]) {
- r[0x118 / 4] = r[0x110 / 4] = d % r[0x100 / 4];
- r[0x11c / 4] = r[0x114 / 4] = d / r[0x100 / 4];
- }
- break;
- case 0x114:
- elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x",
- id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id));
- if (r[0x100 / 4]) {
- long long divident = (long long)r[0x110 / 4] << 32 | d;
- // XXX: undocumented mirroring to 0x118,0x11c?
- r[0x118 / 4] = r[0x110 / 4] = divident % r[0x100 / 4];
- r[0x11c / 4] = r[0x114 / 4] = divident / r[0x100 / 4];
- }
- break;
- }
+// 32x 68k handlers
- if ((a == 0x1b0 || a == 0x18c) && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) {
- elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x",
- dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id));
- dmac0->tcr0 &= 0xffffff;
- // DREQ is only sent after first 4 words are written.
- // we do multiple of 4 words to avoid messing up alignment
- if (dmac0->sar0 == 0x20004012 && Pico32x.dmac_ptr && (Pico32x.dmac_ptr & 3) == 0) {
- elprintf(EL_32X, "68k -> sh2 DMA");
- dma_68k2sh2_do();
- }
- }
-}
-
-// ------------------------------------------------------------------
-// default 32x handlers
-u32 PicoRead8_32x(u32 a)
+// after ADEN
+static u32 PicoRead8_32x_on(u32 a)
{
u32 d = 0;
if ((a & 0xffc0) == 0x5100) { // a15100
goto out_16to8;
}
- if (!(Pico32x.regs[0] & 1))
- goto no_vdp;
+ if ((a & 0xfc00) != 0x5000) {
+ if (PicoIn.AHW & PAHW_MCD)
+ return PicoRead8_mcd_io(a);
+ else
+ return PicoRead8_io(a);
+ }
if ((a & 0xfff0) == 0x5180) { // a15180
d = p32x_vdp_read16(a);
goto out_16to8;
}
-no_vdp:
if ((a & 0xfffc) == 0x30ec) { // a130ec
d = str_mars[a & 3];
goto out;
return d;
}
-u32 PicoRead16_32x(u32 a)
+static u32 PicoRead16_32x_on(u32 a)
{
u32 d = 0;
if ((a & 0xffc0) == 0x5100) { // a15100
goto out;
}
- if (!(Pico32x.regs[0] & 1))
- goto no_vdp;
+ if ((a & 0xfc00) != 0x5000) {
+ if (PicoIn.AHW & PAHW_MCD)
+ return PicoRead16_mcd_io(a);
+ else
+ return PicoRead16_io(a);
+ }
if ((a & 0xfff0) == 0x5180) { // a15180
d = p32x_vdp_read16(a);
goto out;
}
-no_vdp:
if ((a & 0xfffc) == 0x30ec) { // a130ec
d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
goto out;
return d;
}
-void PicoWrite8_32x(u32 a, u32 d)
+static void PicoWrite8_32x_on(u32 a, u32 d)
{
if ((a & 0xfc00) == 0x5000)
elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
return;
}
- if (!(Pico32x.regs[0] & 1))
- goto no_vdp;
-
- if ((a & 0xfff0) == 0x5180) { // a15180
- p32x_vdp_write8(a, d);
+ if ((a & 0xfc00) != 0x5000) {
+ m68k_write8_io(a, d);
return;
}
- // TODO: verify
- if ((a & 0xfe00) == 0x5200) { // a15200
- elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
- ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
- Pico32x.dirty_pal = 1;
- return;
+ if (!(Pico32x.regs[0] & P32XS_FM)) {
+ if ((a & 0xfff0) == 0x5180) { // a15180
+ p32x_vdp_write8(a, d);
+ return;
+ }
+
+ // TODO: verify
+ if ((a & 0xfe00) == 0x5200) { // a15200
+ elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+ ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
+ Pico32x.dirty_pal = 1;
+ return;
+ }
}
-no_vdp:
elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
}
-void PicoWrite16_32x(u32 a, u32 d)
+static void PicoWrite8_32x_on_io(u32 a, u32 d)
+{
+ PicoWrite8_io(a, d);
+ if (a == 0xa130f1)
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
+}
+
+static void PicoWrite8_32x_on_io_cd(u32 a, u32 d)
+{
+ PicoWrite8_mcd_io(a, d);
+ if (a == 0xa130f1)
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
+}
+
+static void PicoWrite8_32x_on_io_ssf2(u32 a, u32 d)
+{
+ carthw_ssf2_write8(a, d);
+ if ((a & ~0x0e) == 0xa130f1)
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
+}
+
+static void PicoWrite16_32x_on(u32 a, u32 d)
{
if ((a & 0xfc00) == 0x5000)
- elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+ elprintf(EL_32X, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
if ((a & 0xffc0) == 0x5100) { // a15100
p32x_reg_write16(a, d);
return;
}
- if (!(Pico32x.regs[0] & 1))
- goto no_vdp;
-
- if ((a & 0xfff0) == 0x5180) { // a15180
- p32x_vdp_write16(a, d);
+ if ((a & 0xfc00) != 0x5000) {
+ m68k_write16_io(a, d);
return;
}
- if ((a & 0xfe00) == 0x5200) { // a15200
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
- return;
+ if (!(Pico32x.regs[0] & P32XS_FM)) {
+ if ((a & 0xfff0) == 0x5180) { // a15180
+ p32x_vdp_write16(a, d, NULL); // FIXME?
+ return;
+ }
+
+ if ((a & 0xfe00) == 0x5200) { // a15200
+ Pico32xMem->pal[(a & 0x1ff) / 2] = d;
+ Pico32x.dirty_pal = 1;
+ return;
+ }
}
-no_vdp:
elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
}
-// hint vector is writeable
-static void PicoWrite8_hint(u32 a, u32 d)
+static void PicoWrite16_32x_on_io(u32 a, u32 d)
{
- if ((a & 0xfffc) == 0x0070) {
- Pico32xMem->m68k_rom[a ^ 1] = d;
- return;
- }
-
- elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+ PicoWrite16_io(a, d);
+ if (a == 0xa130f0)
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
}
-static void PicoWrite16_hint(u32 a, u32 d)
+static void PicoWrite16_32x_on_io_cd(u32 a, u32 d)
{
- if ((a & 0xfffc) == 0x0070) {
- ((u16 *)Pico32xMem->m68k_rom)[a/2] = d;
- return;
- }
-
- elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+ PicoWrite16_mcd_io(a, d);
+ if (a == 0xa130f0)
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
}
-void Pico32xSwapDRAM(int b)
+static void PicoWrite16_32x_on_io_ssf2(u32 a, u32 d)
{
- cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
- cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
- cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
- cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
+ PicoWrite16_io(a, d);
+ if ((a & ~0x0f) == 0xa130f0) {
+ carthw_ssf2_write8(a + 1, d);
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
+ }
}
-static void bank_switch(int b)
+// before ADEN
+u32 PicoRead8_32x(u32 a)
{
- unsigned int rs, bank;
+ u32 d = 0;
- bank = b << 20;
- if (bank >= Pico.romsize) {
- elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank);
- return;
+ if (PicoIn.opt & POPT_EN_32X) {
+ if ((a & 0xffc0) == 0x5100) { // a15100
+ // regs are always readable
+ d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1];
+ goto out;
+ }
+
+ if ((a & 0xfffc) == 0x30ec) { // a130ec
+ d = str_mars[a & 3];
+ goto out;
+ }
}
- // 32X ROM (unbanked, XXX: consider mirroring?)
- rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
- rs -= bank;
- if (rs > 0x100000)
- rs = 0x100000;
- cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
- cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
+ elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
+ return d;
- elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
+out:
+ elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc);
+ return d;
+}
+
+u32 PicoRead16_32x(u32 a)
+{
+ u32 d = 0;
+
+ if (PicoIn.opt & POPT_EN_32X) {
+ if ((a & 0xffc0) == 0x5100) { // a15100
+ d = Pico32x.regs[(a & 0x3f) / 2];
+ goto out;
+ }
+
+ if ((a & 0xfffc) == 0x30ec) { // a130ec
+ d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
+ goto out;
+ }
+ }
+
+ elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
+ return d;
+
+out:
+ elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc);
+ return d;
+}
+
+void PicoWrite8_32x(u32 a, u32 d)
+{
+ if ((PicoIn.opt & POPT_EN_32X) && (a & 0xffc0) == 0x5100) // a15100
+ {
+ u16 *r = Pico32x.regs;
+
+ elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+ a &= 0x3f;
+ if (a == 1) {
+ if ((d ^ r[0]) & d & P32XS_ADEN) {
+ Pico32xStartup();
+ r[0] &= ~P32XS_nRES; // causes reset if specified by this write
+ r[0] |= P32XS_ADEN;
+ p32x_reg_write8(a, d); // forward for reset processing
+ }
+ return;
+ }
+
+ // allow only COMM for now
+ if ((a & 0x30) == 0x20) {
+ u8 *r8 = (u8 *)r;
+ r8[a ^ 1] = d;
+ }
+ return;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+}
+
+void PicoWrite16_32x(u32 a, u32 d)
+{
+ if ((PicoIn.opt & POPT_EN_32X) && (a & 0xffc0) == 0x5100) // a15100
+ {
+ u16 *r = Pico32x.regs;
+
+ elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+ a &= 0x3e;
+ if (a == 0) {
+ if ((d ^ r[0]) & d & P32XS_ADEN) {
+ Pico32xStartup();
+ r[0] &= ~P32XS_nRES; // causes reset if specified by this write
+ r[0] |= P32XS_ADEN;
+ p32x_reg_write16(a, d); // forward for reset processing
+ }
+ return;
+ }
+
+ // allow only COMM for now
+ if ((a & 0x30) == 0x20)
+ r[a / 2] = d;
+ return;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+}
+
+/* quirk: in both normal and overwrite areas only nonzero values go through */
+#define sh2_write8_dramN(n) \
+ if ((d & 0xff) != 0) { \
+ u8 *dram = (u8 *)Pico32xMem->dram[n]; \
+ dram[(a & 0x1ffff) ^ 1] = d; \
+ }
+
+static void m68k_write8_dram0_ow(u32 a, u32 d)
+{
+ sh2_write8_dramN(0);
+}
+
+static void m68k_write8_dram1_ow(u32 a, u32 d)
+{
+ sh2_write8_dramN(1);
+}
+
+#define sh2_write16_dramN(n) \
+ u16 *pd = &Pico32xMem->dram[n][(a & 0x1ffff) / 2]; \
+ if (!(a & 0x20000)) { \
+ *pd = d; \
+ return; \
+ } \
+ /* overwrite */ \
+ if (!(d & 0xff00)) d |= *pd & 0xff00; \
+ if (!(d & 0x00ff)) d |= *pd & 0x00ff; \
+ *pd = d;
+
+static void m68k_write16_dram0_ow(u32 a, u32 d)
+{
+ sh2_write16_dramN(0);
+}
+
+static void m68k_write16_dram1_ow(u32 a, u32 d)
+{
+ sh2_write16_dramN(1);
}
-// -----------------------------------------------------------------
-// SH2
// -----------------------------------------------------------------
-u32 p32x_sh2_read8(u32 a, int id)
+// hint vector is writeable
+static void PicoWrite8_hint(u32 a, u32 d)
{
- u32 d = 0;
+ if ((a & 0xfffc) == 0x0070) {
+ Pico32xMem->m68k_rom[a ^ 1] = d;
+ return;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x",
+ a, d & 0xff, SekPc);
+}
+
+static void PicoWrite16_hint(u32 a, u32 d)
+{
+ if ((a & 0xfffc) == 0x0070) {
+ ((u16 *)Pico32xMem->m68k_rom)[a/2] = d;
+ return;
+ }
+
+ elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x",
+ a, d & 0xffff, SekPc);
+}
+
+// normally not writable, but somebody could make a RAM cart
+static void PicoWrite8_cart(u32 a, u32 d)
+{
+ elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
+
+ a &= 0xfffff;
+ m68k_write8(a, d);
+}
+
+static void PicoWrite16_cart(u32 a, u32 d)
+{
+ elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+
+ a &= 0xfffff;
+ m68k_write16(a, d);
+}
+
+// same with bank, but save ram is sometimes here
+static u32 PicoRead8_bank(u32 a)
+{
+ a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
+ return m68k_read8(a);
+}
+
+static u32 PicoRead16_bank(u32 a)
+{
+ a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
+ return m68k_read16(a);
+}
+
+static void PicoWrite8_bank(u32 a, u32 d)
+{
+ if (!(Pico.m.sram_reg & SRR_MAPPED))
+ elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x",
+ a, d & 0xff, SekPc);
+
+ a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
+ m68k_write8(a, d);
+}
+
+static void PicoWrite16_bank(u32 a, u32 d)
+{
+ if (!(Pico.m.sram_reg & SRR_MAPPED))
+ elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x",
+ a, d & 0xffff, SekPc);
+
+ a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff);
+ m68k_write16(a, d);
+}
+
+static void bank_map_handler(void)
+{
+ cpu68k_map_set(m68k_read8_map, 0x900000, 0x9fffff, PicoRead8_bank, 1);
+ cpu68k_map_set(m68k_read16_map, 0x900000, 0x9fffff, PicoRead16_bank, 1);
+}
- if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
- return Pico32xMem->sh2_rom_m[a ^ 1];
- if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
- return Pico32xMem->sh2_rom_s[a ^ 1];
+static void bank_switch_rom_68k(int b)
+{
+ unsigned int rs, bank, bank2;
- if ((a & 0xdffc0000) == 0x06000000)
- return Pico32xMem->sdram[(a & 0x3ffff) ^ 1];
+ if (Pico.m.ncart_in)
+ return;
- if ((a & 0xdfc00000) == 0x02000000)
- if ((a & 0x003fffff) < Pico.romsize)
- return Pico.rom[(a & 0x3fffff) ^ 1];
+ bank = b << 20;
+ if ((Pico.m.sram_reg & SRR_MAPPED) && bank == Pico.sv.start) {
+ bank_map_handler();
+ return;
+ }
- if ((a & ~0xfff) == 0xc0000000)
- return Pico32xMem->data_array[id][(a & 0xfff) ^ 1];
+ if (bank >= Pico.romsize) {
+ elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank);
+ bank_map_handler();
+ return;
+ }
- if ((a & 0xdffe0000) == 0x04000000) {
- u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
- return dram[(a & 0x1ffff) ^ 1];
+ // 32X ROM (XXX: consider mirroring?)
+ rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
+ if (!carthw_ssf2_active) {
+ rs -= bank;
+ if (rs > 0x100000)
+ rs = 0x100000;
+ cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
+ cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
+ elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
+ }
+ else {
+ bank = bank >> 19;
+ bank2 = carthw_ssf2_banks[bank + 0] << 19;
+ cpu68k_map_set(m68k_read8_map, 0x900000, 0x97ffff, Pico.rom + bank2, 0);
+ cpu68k_map_set(m68k_read16_map, 0x900000, 0x97ffff, Pico.rom + bank2, 0);
+ bank2 = carthw_ssf2_banks[bank + 1] << 19;
+ cpu68k_map_set(m68k_read8_map, 0x980000, 0x9fffff, Pico.rom + bank2, 0);
+ cpu68k_map_set(m68k_read16_map, 0x980000, 0x9fffff, Pico.rom + bank2, 0);
}
+}
+
+// -----------------------------------------------------------------
+// SH2
+// -----------------------------------------------------------------
+
+// read8
+static u32 sh2_read8_unmapped(u32 a, SH2 *sh2)
+{
+ elprintf_sh2(sh2, EL_32X, "unmapped r8 [%08x] %02x @%06x",
+ a, 0, sh2_pc(sh2));
+ return 0;
+}
+
+static u32 sh2_read8_cs0(u32 a, SH2 *sh2)
+{
+ u32 d = 0;
- if ((a & 0xdfffff00) == 0x4000) {
- d = p32x_sh2reg_read16(a, id);
+ sh2_burn_cycles(sh2, 1*2);
+
+ // 0x3ffc0 is veridied
+ if ((a & 0x3ffc0) == 0x4000) {
+ d = p32x_sh2reg_read16(a, sh2);
goto out_16to8;
}
- if ((a & 0xdfffff00) == 0x4100) {
+ if ((a & 0x3fff0) == 0x4100) {
d = p32x_vdp_read16(a);
- if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
- ash2_end_run(8);
+ sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7);
goto out_16to8;
}
- if ((a & 0xdfffff00) == 0x4200) {
+ // TODO: mirroring?
+ if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
+ return Pico32xMem->sh2_rom_m.b[a ^ 1];
+ if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
+ return Pico32xMem->sh2_rom_s.b[a ^ 1];
+
+ if ((a & 0x3fe00) == 0x4200) {
d = Pico32xMem->pal[(a & 0x1ff) / 2];
goto out_16to8;
}
- if ((a & 0xfffffe00) == 0xfffffe00)
- return sh2_peripheral_read8(a, id);
-
- elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x",
- id ? 's' : 'm', a, d, sh2_pc(id));
- return d;
+ return sh2_read8_unmapped(a, sh2);
out_16to8:
if (a & 1)
else
d >>= 8;
- elprintf(EL_32X, "%csh2 r8 [%08x] %02x @%06x",
- id ? 's' : 'm', a, d, sh2_pc(id));
+ elprintf_sh2(sh2, EL_32X, "r8 [%08x] %02x @%06x",
+ a, d, sh2_pc(sh2));
return d;
}
-u32 p32x_sh2_read16(u32 a, int id)
+static u32 sh2_read8_da(u32 a, SH2 *sh2)
{
- u32 d = 0;
-
- if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
- return *(u16 *)(Pico32xMem->sh2_rom_m + a);
- if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
- return *(u16 *)(Pico32xMem->sh2_rom_s + a);
+ return sh2->data_array[(a & 0xfff) ^ 1];
+}
- if ((a & 0xdffc0000) == 0x06000000)
- return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2];
+// for ssf2
+static u32 sh2_read8_rom(u32 a, SH2 *sh2)
+{
+ u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19;
+ return Pico.rom[(bank + (a & 0x7ffff)) ^ 1];
+}
- if ((a & 0xdfc00000) == 0x02000000)
- if ((a & 0x003fffff) < Pico.romsize)
- return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2];
+// read16
+static u32 sh2_read16_unmapped(u32 a, SH2 *sh2)
+{
+ elprintf_sh2(sh2, EL_32X, "unmapped r16 [%08x] %04x @%06x",
+ a, 0, sh2_pc(sh2));
+ return 0;
+}
- if ((a & ~0xfff) == 0xc0000000)
- return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2];
+static u32 sh2_read16_cs0(u32 a, SH2 *sh2)
+{
+ u32 d = 0;
- if ((a & 0xdffe0000) == 0x04000000)
- return Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2];
+ sh2_burn_cycles(sh2, 1*2);
- if ((a & 0xdfffff00) == 0x4000) {
- d = p32x_sh2reg_read16(a, id);
+ if ((a & 0x3ffc0) == 0x4000) {
+ d = p32x_sh2reg_read16(a, sh2);
+ if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM
+ return d;
goto out;
}
- if ((a & 0xdfffff00) == 0x4100) {
+ if ((a & 0x3fff0) == 0x4100) {
d = p32x_vdp_read16(a);
- if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
- ash2_end_run(8);
+ sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7);
goto out;
}
- if ((a & 0xdfffff00) == 0x4200) {
+ if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m))
+ return Pico32xMem->sh2_rom_m.w[a / 2];
+ if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s))
+ return Pico32xMem->sh2_rom_s.w[a / 2];
+
+ if ((a & 0x3fe00) == 0x4200) {
d = Pico32xMem->pal[(a & 0x1ff) / 2];
goto out;
}
- elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x",
- id ? 's' : 'm', a, d, sh2_pc(id));
- return d;
+ return sh2_read16_unmapped(a, sh2);
out:
- elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x",
- id ? 's' : 'm', a, d, sh2_pc(id));
+ elprintf_sh2(sh2, EL_32X, "r16 [%08x] %04x @%06x",
+ a, d, sh2_pc(sh2));
return d;
}
-u32 p32x_sh2_read32(u32 a, int id)
+static u32 sh2_read16_da(u32 a, SH2 *sh2)
+{
+ return ((u16 *)sh2->data_array)[(a & 0xfff) / 2];
+}
+
+static u32 sh2_read16_rom(u32 a, SH2 *sh2)
{
- if ((a & 0xfffffe00) == 0xfffffe00)
- return sh2_peripheral_read32(a, id);
+ u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19;
+ return *(u16 *)(Pico.rom + bank + (a & 0x7fffe));
+}
-// elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc());
- return (p32x_sh2_read16(a, id) << 16) | p32x_sh2_read16(a + 2, id);
+// writes
+static void REGPARM(3) sh2_write_ignore(u32 a, u32 d, SH2 *sh2)
+{
}
-void p32x_sh2_write8(u32 a, u32 d, int id)
+// write8
+static void REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, SH2 *sh2)
{
- if ((a & 0xdffffc00) == 0x4000)
- elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x",
- id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
+ elprintf_sh2(sh2, EL_32X, "unmapped w8 [%08x] %02x @%06x",
+ a, d & 0xff, sh2_pc(sh2));
+}
- if ((a & 0xdffc0000) == 0x06000000) {
- Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d;
- return;
- }
+static void REGPARM(3) sh2_write8_cs0(u32 a, u32 d, SH2 *sh2)
+{
+ elprintf_sh2(sh2, EL_32X, "w8 [%08x] %02x @%06x",
+ a, d & 0xff, sh2_pc(sh2));
- if ((a & 0xdffc0000) == 0x04000000) {
- u8 *dram;
- if (!(a & 0x20000) || d) {
- dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
- dram[(a & 0x1ffff) ^ 1] = d;
+ if (Pico32x.regs[0] & P32XS_FM) {
+ if ((a & 0x3fff0) == 0x4100) {
+ sh2->poll_addr = 0;
+ p32x_vdp_write8(a, d);
return;
}
}
- if ((a & ~0xfff) == 0xc0000000) {
- Pico32xMem->data_array[id][(a & 0xfff) ^ 1] = d;
+ if ((a & 0x3ffc0) == 0x4000) {
+ p32x_sh2reg_write8(a, d, sh2);
return;
}
- if ((a & 0xdfffff00) == 0x4100) {
- p32x_vdp_write8(a, d);
- return;
- }
+ sh2_write8_unmapped(a, d, sh2);
+}
- if ((a & 0xdfffff00) == 0x4000) {
- p32x_sh2reg_write8(a, d, id);
- return;
+static void REGPARM(3) sh2_write8_dram0(u32 a, u32 d, SH2 *sh2)
+{
+ sh2_write8_dramN(0);
+}
+
+static void REGPARM(3) sh2_write8_dram1(u32 a, u32 d, SH2 *sh2)
+{
+ sh2_write8_dramN(1);
+}
+
+static void REGPARM(3) sh2_write8_sdram(u32 a, u32 d, SH2 *sh2)
+{
+ u32 a1 = a & 0x3ffff;
+#ifdef DRC_SH2
+ int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT];
+ if (t)
+ sh2_drc_wcheck_ram(a, t, sh2->is_slave);
+#endif
+ Pico32xMem->sdram[a1 ^ 1] = d;
+}
+
+static void REGPARM(3) sh2_write8_sdram_wt(u32 a, u32 d, SH2 *sh2)
+{
+ // xmen sync hack..
+ if (a < 0x26000200)
+ sh2_end_run(sh2, 32);
+
+ sh2_write8_sdram(a, d, sh2);
+}
+
+static void REGPARM(3) sh2_write8_da(u32 a, u32 d, SH2 *sh2)
+{
+ u32 a1 = a & 0xfff;
+#ifdef DRC_SH2
+ int id = sh2->is_slave;
+ int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT];
+ if (t)
+ sh2_drc_wcheck_da(a, t, id);
+#endif
+ sh2->data_array[a1 ^ 1] = d;
+}
+
+// write16
+static void REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, SH2 *sh2)
+{
+ elprintf_sh2(sh2, EL_32X, "unmapped w16 [%08x] %04x @%06x",
+ a, d & 0xffff, sh2_pc(sh2));
+}
+
+static void REGPARM(3) sh2_write16_cs0(u32 a, u32 d, SH2 *sh2)
+{
+ if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM
+ elprintf_sh2(sh2, EL_32X, "w16 [%08x] %04x @%06x",
+ a, d & 0xffff, sh2_pc(sh2));
+
+ if (Pico32x.regs[0] & P32XS_FM) {
+ if ((a & 0x3fff0) == 0x4100) {
+ sh2->poll_addr = 0;
+ p32x_vdp_write16(a, d, sh2);
+ return;
+ }
+
+ if ((a & 0x3fe00) == 0x4200) {
+ Pico32xMem->pal[(a & 0x1ff) / 2] = d;
+ Pico32x.dirty_pal = 1;
+ return;
+ }
}
- if ((a & 0xfffffe00) == 0xfffffe00) {
- sh2_peripheral_write8(a, d, id);
+ if ((a & 0x3ffc0) == 0x4000) {
+ p32x_sh2reg_write16(a, d, sh2);
return;
}
- elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x",
- id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
+ sh2_write16_unmapped(a, d, sh2);
}
-void p32x_sh2_write16(u32 a, u32 d, int id)
+static void REGPARM(3) sh2_write16_dram0(u32 a, u32 d, SH2 *sh2)
{
- if ((a & 0xdffffc00) == 0x4000)
- elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x",
- id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
+ sh2_write16_dramN(0);
+}
- // ignore "Associative purge space"
- if ((a & 0xf8000000) == 0x40000000)
- return;
+static void REGPARM(3) sh2_write16_dram1(u32 a, u32 d, SH2 *sh2)
+{
+ sh2_write16_dramN(1);
+}
- if ((a & 0xdffc0000) == 0x06000000) {
- ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d;
- return;
+static void REGPARM(3) sh2_write16_sdram(u32 a, u32 d, SH2 *sh2)
+{
+ u32 a1 = a & 0x3ffff;
+#ifdef DRC_SH2
+ int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT];
+ if (t)
+ sh2_drc_wcheck_ram(a, t, sh2->is_slave);
+#endif
+ ((u16 *)Pico32xMem->sdram)[a1 / 2] = d;
+}
+
+static void REGPARM(3) sh2_write16_da(u32 a, u32 d, SH2 *sh2)
+{
+ u32 a1 = a & 0xfff;
+#ifdef DRC_SH2
+ int id = sh2->is_slave;
+ int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT];
+ if (t)
+ sh2_drc_wcheck_da(a, t, id);
+#endif
+ ((u16 *)sh2->data_array)[a1 / 2] = d;
+}
+
+
+typedef u32 (sh2_read_handler)(u32 a, SH2 *sh2);
+typedef void REGPARM(3) (sh2_write_handler)(u32 a, u32 d, SH2 *sh2);
+
+#define SH2MAP_ADDR2OFFS_R(a) \
+ ((u32)(a) >> SH2_READ_SHIFT)
+
+#define SH2MAP_ADDR2OFFS_W(a) \
+ ((u32)(a) >> SH2_WRITE_SHIFT)
+
+u32 REGPARM(2) p32x_sh2_read8(u32 a, SH2 *sh2)
+{
+ const sh2_memmap *sh2_map = sh2->read8_map;
+ uptr p;
+
+ sh2_map += SH2MAP_ADDR2OFFS_R(a);
+ p = sh2_map->addr;
+ if (map_flag_set(p))
+ return ((sh2_read_handler *)(p << 1))(a, sh2);
+ else
+ return *(u8 *)((p << 1) + ((a & sh2_map->mask) ^ 1));
+}
+
+u32 REGPARM(2) p32x_sh2_read16(u32 a, SH2 *sh2)
+{
+ const sh2_memmap *sh2_map = sh2->read16_map;
+ uptr p;
+
+ sh2_map += SH2MAP_ADDR2OFFS_R(a);
+ p = sh2_map->addr;
+ if (map_flag_set(p))
+ return ((sh2_read_handler *)(p << 1))(a, sh2);
+ else
+ return *(u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
+}
+
+u32 REGPARM(2) p32x_sh2_read32(u32 a, SH2 *sh2)
+{
+ const sh2_memmap *sh2_map = sh2->read16_map;
+ sh2_read_handler *handler;
+ u32 offs;
+ uptr p;
+
+ offs = SH2MAP_ADDR2OFFS_R(a);
+ sh2_map += offs;
+ p = sh2_map->addr;
+ if (!map_flag_set(p)) {
+ // XXX: maybe 32bit access instead with ror?
+ u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1));
+ return (pd[0] << 16) | pd[1];
}
- if ((a & ~0xfff) == 0xc0000000) {
- ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2] = d;
+ if (offs == SH2MAP_ADDR2OFFS_R(0xffffc000))
+ return sh2_peripheral_read32(a, sh2);
+
+ handler = (sh2_read_handler *)(p << 1);
+ return (handler(a, sh2) << 16) | handler(a + 2, sh2);
+}
+
+void REGPARM(3) p32x_sh2_write8(u32 a, u32 d, SH2 *sh2)
+{
+ const void **sh2_wmap = sh2->write8_tab;
+ sh2_write_handler *wh;
+
+ wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)];
+ wh(a, d, sh2);
+}
+
+void REGPARM(3) p32x_sh2_write16(u32 a, u32 d, SH2 *sh2)
+{
+ const void **sh2_wmap = sh2->write16_tab;
+ sh2_write_handler *wh;
+
+ wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)];
+ wh(a, d, sh2);
+}
+
+void REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2)
+{
+ const void **sh2_wmap = sh2->write16_tab;
+ sh2_write_handler *wh;
+ u32 offs;
+
+ offs = SH2MAP_ADDR2OFFS_W(a);
+
+ if (offs == SH2MAP_ADDR2OFFS_W(0xffffc000)) {
+ sh2_peripheral_write32(a, d, sh2);
return;
}
- if ((a & 0xdffc0000) == 0x04000000) {
- u16 *pd = &Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2];
- if (!(a & 0x20000)) {
- *pd = d;
- return;
- }
- // overwrite
- if (!(d & 0xff00)) d |= *pd & 0xff00;
- if (!(d & 0x00ff)) d |= *pd & 0x00ff;
- *pd = d;
- return;
+ wh = sh2_wmap[offs];
+ wh(a, d >> 16, sh2);
+ wh(a + 2, d, sh2);
+}
+
+// -----------------------------------------------------------------
+
+static void z80_md_bank_write_32x(unsigned int a, unsigned char d)
+{
+ unsigned int addr68k;
+
+ addr68k = Pico.m.z80_bank68k << 15;
+ addr68k += a & 0x7fff;
+ if ((addr68k & 0xfff000) == 0xa15000)
+ Pico32x.emu_flags |= P32XF_Z80_32X_IO;
+
+ elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, d);
+ m68k_write8(addr68k, d);
+}
+
+// -----------------------------------------------------------------
+
+static const u16 msh2_code[] = {
+ // trap instructions
+ 0xaffe, // 200 bra <self>
+ 0x0009, // 202 nop
+ // have to wait a bit until m68k initial program finishes clearing stuff
+ // to avoid races with game SH2 code, like in Tempo
+ 0xd406, // 204 mov.l @(_m_ok,pc), r4
+ 0xc400, // 206 mov.b @(h'0,gbr),r0
+ 0xc801, // 208 tst #1, r0
+ 0x8b0f, // 20a bf cd_start
+ 0xd105, // 20c mov.l @(_cnt,pc), r1
+ 0xd206, // 20e mov.l @(_start,pc), r2
+ 0x71ff, // 210 add #-1, r1
+ 0x4115, // 212 cmp/pl r1
+ 0x89fc, // 214 bt -2
+ 0x6043, // 216 mov r4, r0
+ 0xc208, // 218 mov.l r0, @(h'20,gbr)
+ 0x6822, // 21a mov.l @r2, r8
+ 0x482b, // 21c jmp @r8
+ 0x0009, // 21e nop
+ ('M'<<8)|'_', ('O'<<8)|'K', // 220 _m_ok
+ 0x0001, 0x0000, // 224 _cnt
+ 0x2200, 0x03e0, // master start pointer in ROM
+ // cd_start:
+ 0xd20d, // 22c mov.l @(__cd_,pc), r2
+ 0xc608, // 22e mov.l @(h'20,gbr), r0
+ 0x3200, // 230 cmp/eq r0, r2
+ 0x8bfc, // 232 bf #-2
+ 0xe000, // 234 mov #0, r0
+ 0xcf80, // 236 or.b #0x80,@(r0,gbr)
+ 0xd80b, // 238 mov.l @(_start_cd,pc), r8 // 24000018
+ 0xd30c, // 23a mov.l @(_max_len,pc), r3
+ 0x5b84, // 23c mov.l @(h'10,r8), r11 // master vbr
+ 0x5a82, // 23e mov.l @(8,r8), r10 // entry
+ 0x5081, // 240 mov.l @(4,r8), r0 // len
+ 0x5980, // 242 mov.l @(0,r8), r9 // dst
+ 0x3036, // 244 cmp/hi r3,r0
+ 0x8b00, // 246 bf #1
+ 0x6033, // 248 mov r3,r0
+ 0x7820, // 24a add #0x20, r8
+ // ipl_copy:
+ 0x6286, // 24c mov.l @r8+, r2
+ 0x2922, // 24e mov.l r2, @r9
+ 0x7904, // 250 add #4, r9
+ 0x70fc, // 252 add #-4, r0
+ 0x8800, // 254 cmp/eq #0, r0
+ 0x8bf9, // 256 bf #-5
+ //
+ 0x4b2e, // 258 ldc r11, vbr
+ 0x6043, // 25a mov r4, r0 // M_OK
+ 0xc208, // 25c mov.l r0, @(h'20,gbr)
+ 0x4a2b, // 25e jmp @r10
+ 0x0009, // 260 nop
+ 0x0009, // 262 nop // pad
+ ('_'<<8)|'C', ('D'<<8)|'_', // 264 __cd_
+ 0x2400, 0x0018, // 268 _start_cd
+ 0x0001, 0xffe0, // 26c _max_len
+};
+
+static const u16 ssh2_code[] = {
+ 0xaffe, // 200 bra <self>
+ 0x0009, // 202 nop
+ // code to wait for master, in case authentic master BIOS is used
+ 0xd106, // 204 mov.l @(_m_ok,pc), r1
+ 0xd208, // 206 mov.l @(_start,pc), r2
+ 0xc608, // 208 mov.l @(h'20,gbr), r0
+ 0x3100, // 20a cmp/eq r0, r1
+ 0x8bfc, // 20c bf #-2
+ 0xc400, // 20e mov.b @(h'0,gbr),r0
+ 0xc801, // 210 tst #1, r0
+ 0xd004, // 212 mov.l @(_s_ok,pc), r0
+ 0x8b0a, // 214 bf cd_start
+ 0xc209, // 216 mov.l r0, @(h'24,gbr)
+ 0x6822, // 218 mov.l @r2, r8
+ 0x482b, // 21a jmp @r8
+ 0x0009, // 21c nop
+ 0x0009, // 21e nop
+ ('M'<<8)|'_', ('O'<<8)|'K', // 220
+ ('S'<<8)|'_', ('O'<<8)|'K', // 224
+ 0x2200, 0x03e4, // slave start pointer in ROM
+ // cd_start:
+ 0xd803, // 22c mov.l @(_start_cd,pc), r8 // 24000018
+ 0x5b85, // 22e mov.l @(h'14,r8), r11 // slave vbr
+ 0x5a83, // 230 mov.l @(h'0c,r8), r10 // entry
+ 0x4b2e, // 232 ldc r11, vbr
+ 0xc209, // 234 mov.l r0, @(h'24,gbr) // write S_OK
+ 0x4a2b, // 236 jmp @r10
+ 0x0009, // 238 nop
+ 0x0009, // 23a nop
+ 0x2400, 0x0018, // 23c _start_cd
+};
+
+#define HWSWAP(x) (((u16)(x) << 16) | ((x) >> 16))
+static void get_bios(void)
+{
+ u16 *ps;
+ u32 *pl;
+ int i;
+
+ // M68K ROM
+ if (p32x_bios_g != NULL) {
+ elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS");
+ Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, sizeof(Pico32xMem->m68k_rom));
+ }
+ else {
+ static const u16 andb[] = { 0x0239, 0x00fe, 0x00a1, 0x5107 };
+ static const u16 p_d4[] = {
+ 0x48e7, 0x8040, // movem.l d0/a1, -(sp)
+ 0x227c, 0x00a1, 0x30f1, // movea.l #0xa130f1, a1
+ 0x7007, // moveq.l #7, d0
+ 0x12d8, //0: move.b (a0)+, (a1)+
+ 0x5289, // addq.l #1, a1
+ 0x51c8, 0xfffa, // dbra d0, 0b
+ 0x0239, 0x00fe, 0x00a1, // and.b #0xfe, (0xa15107).l
+ 0x5107,
+ 0x4cdf, 0x0201 // movem.l (sp)+, d0/a1
+ };
+
+ // generate 68k ROM
+ ps = (u16 *)Pico32xMem->m68k_rom;
+ pl = (u32 *)ps;
+ for (i = 1; i < 0xc0/4; i++)
+ pl[i] = HWSWAP(0x880200 + (i - 1) * 6);
+ pl[0x70/4] = 0;
+
+ // fill with nops
+ for (i = 0xc0/2; i < 0x100/2; i++)
+ ps[i] = 0x4e71;
+
+ // c0: don't need to care about RV - not emulated
+ ps[0xc8/2] = 0x1280; // move.b d0, (a1)
+ memcpy(ps + 0xca/2, andb, sizeof(andb)); // and.b #0xfe, (a15107)
+ ps[0xd2/2] = 0x4e75; // rts
+ // d4:
+ memcpy(ps + 0xd4/2, p_d4, sizeof(p_d4));
+ ps[0xfe/2] = 0x4e75; // rts
}
+ // fill remaining m68k_rom page with game ROM
+ memcpy(Pico32xMem->m68k_rom_bank + sizeof(Pico32xMem->m68k_rom),
+ Pico.rom + sizeof(Pico32xMem->m68k_rom),
+ sizeof(Pico32xMem->m68k_rom_bank) - sizeof(Pico32xMem->m68k_rom));
+
+ // MSH2
+ if (p32x_bios_m != NULL) {
+ elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS");
+ Byteswap(&Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m));
+ }
+ else {
+ pl = (u32 *)&Pico32xMem->sh2_rom_m;
- if ((a & 0xdfffff00) == 0x4100) {
- p32x_vdp_write16(a, d);
- return;
+ // fill exception vector table to our trap address
+ for (i = 0; i < 128; i++)
+ pl[i] = HWSWAP(0x200);
+
+ // start
+ pl[0] = pl[2] = HWSWAP(0x204);
+ // reset SP
+ pl[1] = pl[3] = HWSWAP(0x6040000);
+
+ // startup code
+ memcpy(&Pico32xMem->sh2_rom_m.b[0x200], msh2_code, sizeof(msh2_code));
}
- if ((a & 0xdffffe00) == 0x4200) {
- Pico32xMem->pal[(a & 0x1ff) / 2] = d;
- Pico32x.dirty_pal = 1;
- return;
+ // SSH2
+ if (p32x_bios_s != NULL) {
+ elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS");
+ Byteswap(&Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s));
}
+ else {
+ pl = (u32 *)&Pico32xMem->sh2_rom_s;
- if ((a & 0xdfffff00) == 0x4000) {
- p32x_sh2reg_write16(a, d, id);
- return;
+ // fill exception vector table to our trap address
+ for (i = 0; i < 128; i++)
+ pl[i] = HWSWAP(0x200);
+
+ // start
+ pl[0] = pl[2] = HWSWAP(0x204);
+ // reset SP
+ pl[1] = pl[3] = HWSWAP(0x603f800);
+
+ // startup code
+ memcpy(&Pico32xMem->sh2_rom_s.b[0x200], ssh2_code, sizeof(ssh2_code));
}
+}
- elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x",
- id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
+#define MAP_MEMORY(m) ((uptr)(m) >> 1)
+#define MAP_HANDLER(h) ( ((uptr)(h) >> 1) | ((uptr)1 << (sizeof(uptr) * 8 - 1)) )
+
+static sh2_memmap sh2_read8_map[0x80], sh2_read16_map[0x80];
+// for writes we are using handlers only
+static sh2_write_handler *sh2_write8_map[0x80], *sh2_write16_map[0x80];
+
+void Pico32xSwapDRAM(int b)
+{
+ cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
+ cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
+ cpu68k_map_set(m68k_read8_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0);
+ cpu68k_map_set(m68k_read16_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0);
+ cpu68k_map_set(m68k_write8_map, 0x840000, 0x87ffff,
+ b ? m68k_write8_dram1_ow : m68k_write8_dram0_ow, 1);
+ cpu68k_map_set(m68k_write16_map, 0x840000, 0x87ffff,
+ b ? m68k_write16_dram1_ow : m68k_write16_dram0_ow, 1);
+
+ // SH2
+ sh2_read8_map[0x04/2].addr = sh2_read8_map[0x24/2].addr =
+ sh2_read16_map[0x04/2].addr = sh2_read16_map[0x24/2].addr = MAP_MEMORY(Pico32xMem->dram[b]);
+
+ sh2_write8_map[0x04/2] = sh2_write8_map[0x24/2] = b ? sh2_write8_dram1 : sh2_write8_dram0;
+ sh2_write16_map[0x04/2] = sh2_write16_map[0x24/2] = b ? sh2_write16_dram1 : sh2_write16_dram0;
}
-void p32x_sh2_write32(u32 a, u32 d, int id)
+static void bank_switch_rom_sh2(void)
{
- if ((a & 0xfffffe00) == 0xfffffe00) {
- sh2_peripheral_write32(a, d, id);
- return;
+ if (!carthw_ssf2_active) {
+ // easy
+ sh2_read8_map[0x02/2].addr = sh2_read8_map[0x22/2].addr =
+ sh2_read16_map[0x02/2].addr = sh2_read16_map[0x22/2].addr = MAP_MEMORY(Pico.rom);
+ }
+ else {
+ sh2_read8_map[0x02/2].addr = sh2_read8_map[0x22/2].addr = MAP_HANDLER(sh2_read8_rom);
+ sh2_read16_map[0x02/2].addr = sh2_read16_map[0x22/2].addr = MAP_HANDLER(sh2_read16_rom);
}
-
- p32x_sh2_write16(a, d >> 16, id);
- p32x_sh2_write16(a + 2, d, id);
}
-#define HWSWAP(x) (((x) << 16) | ((x) >> 16))
void PicoMemSetup32x(void)
{
- unsigned short *ps;
- unsigned int *pl;
unsigned int rs;
int i;
- Pico32xMem = calloc(1, sizeof(*Pico32xMem));
+ Pico32xMem = plat_mmap(0x06000000, sizeof(*Pico32xMem), 0, 0);
if (Pico32xMem == NULL) {
elprintf(EL_STATUS, "OOM");
return;
}
- dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
+ get_bios();
- // generate 68k ROM
- ps = (unsigned short *)Pico32xMem->m68k_rom;
- pl = (unsigned int *)Pico32xMem->m68k_rom;
- for (i = 1; i < 0xc0/4; i++)
- pl[i] = HWSWAP(0x880200 + (i - 1) * 6);
+ // cartridge area becomes unmapped
+ // XXX: we take the easy way and don't unmap ROM,
+ // so that we can avoid handling the RV bit.
+ // m68k_map_unmap(0x000000, 0x3fffff);
- // fill with nops
- for (i = 0xc0/2; i < 0x100/2; i++)
- ps[i] = 0x4e71;
+ if (!Pico.m.ncart_in) {
+ // MD ROM area
+ rs = sizeof(Pico32xMem->m68k_rom_bank);
+ cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0);
+ cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0);
+ cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify
+ cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1);
+
+ // 32X ROM (unbanked, XXX: consider mirroring?)
+ rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
+ if (rs > 0x80000)
+ rs = 0x80000;
+ cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
+ cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
+ cpu68k_map_set(m68k_write8_map, 0x880000, 0x880000 + rs - 1, PicoWrite8_cart, 1);
+ cpu68k_map_set(m68k_write16_map, 0x880000, 0x880000 + rs - 1, PicoWrite16_cart, 1);
+
+ // 32X ROM (banked)
+ bank_switch_rom_68k(0);
+ cpu68k_map_set(m68k_write8_map, 0x900000, 0x9fffff, PicoWrite8_bank, 1);
+ cpu68k_map_set(m68k_write16_map, 0x900000, 0x9fffff, PicoWrite16_bank, 1);
+ }
-#if 0
- ps[0xc0/2] = 0x46fc;
- ps[0xc2/2] = 0x2700; // move #0x2700,sr
- ps[0xfe/2] = 0x60fe; // jump to self
-#else
- ps[0xfe/2] = 0x4e75; // rts
-#endif
+ // SYS regs
+ cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1);
+ cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1);
+ cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1);
+ cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1);
- // fill remaining mem with ROM
- memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100);
+ // TODO: cd + carthw
+ if (PicoIn.AHW & PAHW_MCD) {
+ m68k_write8_io = PicoWrite8_32x_on_io_cd;
+ m68k_write16_io = PicoWrite16_32x_on_io_cd;
+ }
+ else if (carthw_ssf2_active) {
+ m68k_write8_io = PicoWrite8_32x_on_io_ssf2;
+ m68k_write16_io = PicoWrite16_32x_on_io_ssf2;
+ }
+ else {
+ m68k_write8_io = PicoWrite8_32x_on_io;
+ m68k_write16_io = PicoWrite16_32x_on_io;
+ }
- // 32X ROM
- // TODO: move
- {
- FILE *f = fopen("32X_M_BIOS.BIN", "rb");
- int i;
- if (f == NULL) {
- printf("missing 32X_M_BIOS.BIN\n");
- exit(1);
- }
- fread(Pico32xMem->sh2_rom_m, 1, sizeof(Pico32xMem->sh2_rom_m), f);
- fclose(f);
- f = fopen("32X_S_BIOS.BIN", "rb");
- if (f == NULL) {
- printf("missing 32X_S_BIOS.BIN\n");
- exit(1);
- }
- fread(Pico32xMem->sh2_rom_s, 1, sizeof(Pico32xMem->sh2_rom_s), f);
- fclose(f);
- // byteswap
- for (i = 0; i < sizeof(Pico32xMem->sh2_rom_m); i += 2) {
- int t = Pico32xMem->sh2_rom_m[i];
- Pico32xMem->sh2_rom_m[i] = Pico32xMem->sh2_rom_m[i + 1];
- Pico32xMem->sh2_rom_m[i + 1] = t;
- }
- for (i = 0; i < sizeof(Pico32xMem->sh2_rom_s); i += 2) {
- int t = Pico32xMem->sh2_rom_s[i];
- Pico32xMem->sh2_rom_s[i] = Pico32xMem->sh2_rom_s[i + 1];
- Pico32xMem->sh2_rom_s[i + 1] = t;
- }
+ // SH2 maps: A31,A30,A29,CS1,CS0
+ // all unmapped by default
+ for (i = 0; i < ARRAY_SIZE(sh2_read8_map); i++) {
+ sh2_read8_map[i].addr = MAP_HANDLER(sh2_read8_unmapped);
+ sh2_read16_map[i].addr = MAP_HANDLER(sh2_read16_unmapped);
}
- // cartridge area becomes unmapped
- // XXX: we take the easy way and don't unmap ROM,
- // so that we can avoid handling the RV bit.
- // m68k_map_unmap(0x000000, 0x3fffff);
+ for (i = 0; i < ARRAY_SIZE(sh2_write8_map); i++) {
+ sh2_write8_map[i] = sh2_write8_unmapped;
+ sh2_write16_map[i] = sh2_write16_unmapped;
+ }
- // MD ROM area
- rs = sizeof(Pico32xMem->m68k_rom);
- cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
- cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
- cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify
- cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1);
+ // "purge area"
+ for (i = 0x40; i <= 0x5f; i++) {
+ sh2_write8_map[i >> 1] =
+ sh2_write16_map[i >> 1] = sh2_write_ignore;
+ }
- // DRAM area
+ // CS0
+ sh2_read8_map[0x00/2].addr = sh2_read8_map[0x20/2].addr = MAP_HANDLER(sh2_read8_cs0);
+ sh2_read16_map[0x00/2].addr = sh2_read16_map[0x20/2].addr = MAP_HANDLER(sh2_read16_cs0);
+ sh2_write8_map[0x00/2] = sh2_write8_map[0x20/2] = sh2_write8_cs0;
+ sh2_write16_map[0x00/2] = sh2_write16_map[0x20/2] = sh2_write16_cs0;
+ // CS1 - ROM
+ bank_switch_rom_sh2();
+ sh2_read8_map[0x02/2].mask = sh2_read8_map[0x22/2].mask =
+ sh2_read16_map[0x02/2].mask = sh2_read16_map[0x22/2].mask = 0x3fffff; // FIXME
+ // CS2 - DRAM - done by Pico32xSwapDRAM()
+ sh2_read8_map[0x04/2].mask = sh2_read8_map[0x24/2].mask =
+ sh2_read16_map[0x04/2].mask = sh2_read16_map[0x24/2].mask = 0x01ffff;
+ // CS3 - SDRAM
+ sh2_read8_map[0x06/2].addr = sh2_read8_map[0x26/2].addr =
+ sh2_read16_map[0x06/2].addr = sh2_read16_map[0x26/2].addr = MAP_MEMORY(Pico32xMem->sdram);
+ sh2_write8_map[0x06/2] = sh2_write8_sdram;
+ sh2_write8_map[0x26/2] = sh2_write8_sdram_wt;
+ sh2_write16_map[0x06/2] = sh2_write16_map[0x26/2] = sh2_write16_sdram;
+ sh2_read8_map[0x06/2].mask = sh2_read8_map[0x26/2].mask =
+ sh2_read16_map[0x06/2].mask = sh2_read16_map[0x26/2].mask = 0x03ffff;
+ // SH2 data array
+ sh2_read8_map[0xc0/2].addr = MAP_HANDLER(sh2_read8_da);
+ sh2_read16_map[0xc0/2].addr = MAP_HANDLER(sh2_read16_da);
+ sh2_write8_map[0xc0/2] = sh2_write8_da;
+ sh2_write16_map[0xc0/2] = sh2_write16_da;
+ // SH2 IO
+ sh2_read8_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read8);
+ sh2_read16_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read16);
+ sh2_write8_map[0xff/2] = sh2_peripheral_write8;
+ sh2_write16_map[0xff/2] = sh2_peripheral_write16;
+
+ // map DRAM area, both 68k and SH2
Pico32xSwapDRAM(1);
- // 32X ROM (unbanked, XXX: consider mirroring?)
- rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
- if (rs > 0x80000)
- rs = 0x80000;
- cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
- cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
+ msh2.read8_map = ssh2.read8_map = sh2_read8_map;
+ msh2.read16_map = ssh2.read16_map = sh2_read16_map;
+ msh2.write8_tab = ssh2.write8_tab = (const void **)(void *)sh2_write8_map;
+ msh2.write16_tab = ssh2.write16_tab = (const void **)(void *)sh2_write16_map;
- // 32X ROM (banked)
- bank_switch(0);
+ sh2_drc_mem_setup(&msh2);
+ sh2_drc_mem_setup(&ssh2);
+
+ // z80 hack
+ z80_map_set(z80_write_map, 0x8000, 0xffff, z80_md_bank_write_32x, 1);
+}
- // setup poll detector
- m68k_poll.flag = P32XF_68KPOLL;
- sh2_poll[0].flag = P32XF_MSH2POLL;
- sh2_poll[1].flag = P32XF_SSH2POLL;
+void p32x_update_banks(void)
+{
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
+ bank_switch_rom_sh2();
+ if (Pico32x.emu_flags & P32XF_DRC_ROM_C)
+ sh2_drc_flush_all();
+}
+
+void Pico32xMemStateLoaded(void)
+{
+ bank_switch_rom_68k(Pico32x.regs[4 / 2]);
+ Pico32xSwapDRAM((Pico32x.vdp_regs[0x0a / 2] & P32XV_FS) ^ P32XV_FS);
+ memset(Pico32xMem->pwm, 0, sizeof(Pico32xMem->pwm));
+ Pico32x.dirty_pal = 1;
+
+ Pico32x.emu_flags &= ~(P32XF_68KCPOLL | P32XF_68KVPOLL);
+ memset(&m68k_poll, 0, sizeof(m68k_poll));
+ msh2.state = 0;
+ msh2.poll_addr = msh2.poll_cycles = msh2.poll_cnt = 0;
+ ssh2.state = 0;
+ ssh2.poll_addr = ssh2.poll_cycles = ssh2.poll_cnt = 0;
+
+ sh2_drc_flush_all();
}
+// vim:shiftwidth=2:ts=2:expandtab