1 #include "../pico_int.h"
7 #define ash2_end_run(x)
11 static const char str_mars[] = "MARS";
13 struct Pico32xMem *Pico32xMem;
15 static void bank_switch(int b);
18 #define POLL_THRESHOLD 6
21 u32 addr, cycles, cyc_max;
24 static struct poll_det m68k_poll, sh2_poll[2];
26 static int p32x_poll_detect(struct poll_det *pd, u32 a, u32 cycles, int is_vdp)
28 int ret = 0, flag = pd->flag;
33 if (a - 2 <= pd->addr && pd->addr <= a + 2 && cycles - pd->cycles < pd->cyc_max) {
35 if (pd->cnt > POLL_THRESHOLD) {
36 if (!(Pico32x.emu_flags & flag)) {
37 elprintf(EL_32X, "%s poll addr %08x, cyc %u",
38 flag & (P32XF_68KPOLL|P32XF_68KVPOLL) ? "m68k" :
39 (flag & (P32XF_MSH2POLL|P32XF_MSH2VPOLL) ? "msh2" : "ssh2"), a, cycles - pd->cycles);
42 Pico32x.emu_flags |= flag;
54 static int p32x_poll_undetect(struct poll_det *pd, int is_vdp)
56 int ret = 0, flag = pd->flag;
58 flag <<= 3; // VDP only
60 flag |= flag << 3; // both
61 if (Pico32x.emu_flags & flag) {
62 elprintf(EL_32X, "poll %02x -> %02x", Pico32x.emu_flags, Pico32x.emu_flags & ~flag);
65 Pico32x.emu_flags &= ~flag;
66 pd->addr = pd->cnt = 0;
70 void p32x_poll_event(int cpu_mask, int is_vdp)
73 p32x_poll_undetect(&sh2_poll[0], is_vdp);
75 p32x_poll_undetect(&sh2_poll[1], is_vdp);
82 static const u16 comm_fakevals[] = {
83 0x4d5f, 0x4f4b, // M_OK
84 0x535f, 0x4f4b, // S_OK
85 0x4D41, 0x5346, // MASF - Brutal Unleashed
86 0x5331, 0x4d31, // Darxide
89 0x0000, 0x0000, // eq for doom
90 0x0002, // Mortal Kombat
94 static u32 sh2_comm_faker(u32 a)
97 if (a == 0x28 && !p32x_csum_faked) {
99 return *(unsigned short *)(Pico.rom + 0x18e);
101 if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0]))
103 return comm_fakevals[f++];
109 unsigned int sar0, dar0, tcr0; // src addr, dst addr, transfer count
110 unsigned int chcr0; // chan ctl
111 unsigned int sar1, dar1, tcr1; // same for chan 1
117 static void dma_68k2sh2_do(void)
119 unsigned short *dreqlen = &Pico32x.regs[0x10 / 2];
122 if (dmac0->tcr0 != *dreqlen)
123 elprintf(EL_32X|EL_ANOMALY, "tcr0 and dreq len differ: %d != %d", dmac0->tcr0, *dreqlen);
125 // HACK: assume bus is busy and SH2 is halted
126 // XXX: use different mechanism for this, not poll det
127 Pico32x.emu_flags |= P32XF_MSH2POLL; // id ? P32XF_SSH2POLL : P32XF_MSH2POLL;
129 for (i = 0; i < Pico32x.dmac_ptr && dmac0->tcr0 > 0; i++) {
130 extern void p32x_sh2_write16(u32 a, u32 d, int id);
131 elprintf(EL_32X, "dmaw [%08x] %04x, left %d", dmac0->dar0, Pico32x.dmac_fifo[i], *dreqlen);
132 p32x_sh2_write16(dmac0->dar0, Pico32x.dmac_fifo[i], 0);
138 Pico32x.dmac_ptr = 0; // HACK
139 Pico32x.regs[6 / 2] &= ~P32XS_FULL;
141 Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete
142 if (dmac0->tcr0 == 0) {
143 dmac0->chcr0 |= 2; // DMA has ended normally
144 p32x_poll_undetect(&sh2_poll[0], 0);
148 // ------------------------------------------------------------------
151 static u32 p32x_reg_read16(u32 a)
155 if (a == 2) // INTM, INTS
156 return ((Pico32x.sh2irqi[0] & P32XI_CMD) >> 4) | ((Pico32x.sh2irqi[1] & P32XI_CMD) >> 3);
158 if ((a & 0x30) == 0x20)
159 return sh2_comm_faker(a);
161 if ((a & 0x30) == 0x20 && p32x_poll_detect(&m68k_poll, a, SekCyclesDoneT(), 0)) {
166 if ((a & 0x30) == 0x30)
167 return p32x_pwm_read16(a);
169 return Pico32x.regs[a / 2];
172 static void p32x_reg_write8(u32 a, u32 d)
174 u16 *r = Pico32x.regs;
177 // for things like bset on comm port
180 if (a == 1 && !(r[0] & 1)) {
190 case 0: // adapter ctl
191 r[0] = (r[0] & 0x83) | ((d << 8) & P32XS_FM);
194 if ((d & 1) && !(Pico32x.sh2irqi[0] & P32XI_CMD)) {
195 Pico32x.sh2irqi[0] |= P32XI_CMD;
199 if ((d & 2) && !(Pico32x.sh2irqi[1] & P32XI_CMD)) {
200 Pico32x.sh2irqi[1] |= P32XI_CMD;
213 r[6 / 2] = (r[6 / 2] & P32XS_FULL) | (d & (P32XS_68S|P32XS_DMA|P32XS_RV));
220 if ((a & 0x30) == 0x20) {
223 if (p32x_poll_undetect(&sh2_poll[0], 0) || p32x_poll_undetect(&sh2_poll[1], 0))
224 // if some SH2 is busy waiting, it needs to see the result ASAP
230 static void p32x_reg_write16(u32 a, u32 d)
232 u16 *r = Pico32x.regs;
235 // for things like bset on comm port
239 case 0x00: // adapter ctl
240 r[0] = (r[0] & 0x83) | (d & P32XS_FM);
242 case 0x10: // DREQ len
245 case 0x12: // FIFO reg
246 if (!(r[6 / 2] & P32XS_68S)) {
247 elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?");
250 if (Pico32x.dmac_ptr < DMAC_FIFO_LEN) {
251 Pico32x.dmac_fifo[Pico32x.dmac_ptr++] = d;
252 if ((Pico32x.dmac_ptr & 3) == 0 && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1))
254 if (Pico32x.dmac_ptr == DMAC_FIFO_LEN)
255 r[6 / 2] |= P32XS_FULL;
261 if ((a & 0x38) == 0x08) {
266 else if ((a & 0x30) == 0x20 && r[a / 2] != d) {
268 if (p32x_poll_undetect(&sh2_poll[0], 0) || p32x_poll_undetect(&sh2_poll[1], 0))
269 // if some SH2 is busy waiting, it needs to see the result ASAP
274 else if ((a & 0x30) == 0x30) {
275 p32x_pwm_write16(a, d);
279 p32x_reg_write8(a + 1, d);
282 // ------------------------------------------------------------------
284 static u32 p32x_vdp_read16(u32 a)
288 return Pico32x.vdp_regs[a / 2];
291 static void p32x_vdp_write8(u32 a, u32 d)
293 u16 *r = Pico32x.vdp_regs;
296 // for FEN checks between writes
299 // TODO: verify what's writeable
302 // priority inversion is handled in palette
303 if ((r[0] ^ d) & P32XV_PRI)
304 Pico32x.dirty_pal = 1;
305 r[0] = (r[0] & P32XV_nPAL) | (d & 0xff);
307 elprintf(EL_32X|EL_ANOMALY, "TODO: mode3");
309 case 0x05: // fill len
314 Pico32x.pending_fb = d;
315 // if we are blanking and FS bit is changing
316 if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) {
318 Pico32xSwapDRAM(d ^ 1);
319 elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS);
325 static void p32x_vdp_write16(u32 a, u32 d)
328 if (a == 6) { // fill start
329 Pico32x.vdp_regs[6 / 2] = d;
332 if (a == 8) { // fill data
333 u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
334 int len = Pico32x.vdp_regs[4 / 2] + 1;
335 a = Pico32x.vdp_regs[6 / 2];
338 a = (a & 0xff00) | ((a + 1) & 0xff);
340 Pico32x.vdp_regs[6 / 2] = a;
341 Pico32x.vdp_regs[8 / 2] = d;
345 p32x_vdp_write8(a | 1, d);
348 // ------------------------------------------------------------------
351 static u32 p32x_sh2reg_read16(u32 a, int cpuid)
353 u16 *r = Pico32x.regs;
357 case 0x00: // adapter/irq ctl
358 return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] | Pico32x.sh2irq_mask[cpuid];
359 case 0x04: // H count (often as comm too)
360 if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0))
362 return Pico32x.sh2_regs[4 / 2];
363 case 0x10: // DREQ len
368 if ((a & 0x38) == 0x08)
371 if ((a & 0x30) == 0x20) {
372 if (p32x_poll_detect(&sh2_poll[cpuid], a, ash2_cycles_done(), 0))
376 if ((a & 0x30) == 0x30) {
377 sh2_poll[cpuid].cnt = 0;
378 return p32x_pwm_read16(a);
384 static void p32x_sh2reg_write8(u32 a, u32 d, int cpuid)
389 Pico32x.regs[0] &= ~P32XS_FM;
390 Pico32x.regs[0] |= (d << 8) & P32XS_FM;
393 Pico32x.sh2irq_mask[cpuid] = d & 0x8f;
394 Pico32x.sh2_regs[0] &= ~0x80;
395 Pico32x.sh2_regs[0] |= d & 0x80;
399 Pico32x.sh2_regs[4 / 2] = d & 0xff;
400 p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
404 if ((a & 0x30) == 0x20) {
405 u8 *r8 = (u8 *)Pico32x.regs;
407 p32x_poll_undetect(&m68k_poll, 0);
408 p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
413 static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid)
418 if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) {
419 Pico32x.regs[a / 2] = d;
420 p32x_poll_undetect(&m68k_poll, 0);
421 p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
425 else if ((a & 0x30) == 0x30) {
426 p32x_pwm_write16(a, d);
432 Pico32x.regs[0] &= ~P32XS_FM;
433 Pico32x.regs[0] |= d & P32XS_FM;
435 case 0x14: Pico32x.sh2irqs &= ~P32XI_VRES; goto irls;
436 case 0x16: Pico32x.sh2irqs &= ~P32XI_VINT; goto irls;
437 case 0x18: Pico32x.sh2irqs &= ~P32XI_HINT; goto irls;
438 case 0x1a: Pico32x.sh2irqi[cpuid] &= ~P32XI_CMD; goto irls;
440 Pico32x.sh2irqs &= ~P32XI_PWM;
441 p32x_pwm_irq_check(0);
445 p32x_sh2reg_write8(a | 1, d, cpuid);
452 // ------------------------------------------------------------------
453 // SH2 internal peripherals
454 static u32 sh2_peripheral_read8(u32 a, int id)
456 u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
464 elprintf(EL_32X, "%csh2 peri r8 [%08x] %02x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
468 static u32 sh2_peripheral_read32(u32 a, int id)
472 d = Pico32xMem->sh2_peri_regs[id][a / 4];
474 elprintf(EL_32X, "%csh2 peri r32 [%08x] %08x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
478 static void sh2_peripheral_write8(u32 a, u32 d, int id)
480 u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
481 elprintf(EL_32X, "%csh2 peri w8 [%08x] %02x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
487 static void sh2_peripheral_write32(u32 a, u32 d, int id)
489 u32 *r = Pico32xMem->sh2_peri_regs[id];
490 elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
496 // division unit (TODO: verify):
497 case 0x104: // DVDNT: divident L, starts divide
498 elprintf(EL_32X, "%csh2 divide %08x / %08x", id ? 's' : 'm', d, r[0x100 / 4]);
500 signed int divisor = r[0x100 / 4];
501 r[0x118 / 4] = r[0x110 / 4] = (signed int)d % divisor;
502 r[0x104 / 4] = r[0x11c / 4] = r[0x114 / 4] = (signed int)d / divisor;
506 elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x",
507 id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id));
509 signed long long divident = (signed long long)r[0x110 / 4] << 32 | d;
510 signed int divisor = r[0x100 / 4];
511 // XXX: undocumented mirroring to 0x118,0x11c?
512 r[0x118 / 4] = r[0x110 / 4] = divident % divisor;
513 r[0x11c / 4] = r[0x114 / 4] = divident / divisor;
518 if ((a == 0x1b0 || a == 0x18c) && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) {
519 elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x",
520 dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id));
521 dmac0->tcr0 &= 0xffffff;
523 // HACK: assume 68k starts writing soon and end the timeslice
526 // DREQ is only sent after first 4 words are written.
527 // we do multiple of 4 words to avoid messing up alignment
528 if (dmac0->sar0 == 0x20004012 && Pico32x.dmac_ptr && (Pico32x.dmac_ptr & 3) == 0) {
529 elprintf(EL_32X, "68k -> sh2 DMA");
535 // ------------------------------------------------------------------
536 // default 32x handlers
537 u32 PicoRead8_32x(u32 a)
540 if ((a & 0xffc0) == 0x5100) { // a15100
541 d = p32x_reg_read16(a);
545 if (!(Pico32x.regs[0] & 1))
548 if ((a & 0xfff0) == 0x5180) { // a15180
549 d = p32x_vdp_read16(a);
553 if ((a & 0xfe00) == 0x5200) { // a15200
554 d = Pico32xMem->pal[(a & 0x1ff) / 2];
559 if ((a & 0xfffc) == 0x30ec) { // a130ec
564 elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);
574 elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc);
578 u32 PicoRead16_32x(u32 a)
581 if ((a & 0xffc0) == 0x5100) { // a15100
582 d = p32x_reg_read16(a);
586 if (!(Pico32x.regs[0] & 1))
589 if ((a & 0xfff0) == 0x5180) { // a15180
590 d = p32x_vdp_read16(a);
594 if ((a & 0xfe00) == 0x5200) { // a15200
595 d = Pico32xMem->pal[(a & 0x1ff) / 2];
600 if ((a & 0xfffc) == 0x30ec) { // a130ec
601 d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S';
605 elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc);
609 elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc);
613 void PicoWrite8_32x(u32 a, u32 d)
615 if ((a & 0xfc00) == 0x5000)
616 elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
618 if ((a & 0xffc0) == 0x5100) { // a15100
619 p32x_reg_write8(a, d);
623 if (!(Pico32x.regs[0] & 1))
626 if ((a & 0xfff0) == 0x5180) { // a15180
627 p32x_vdp_write8(a, d);
632 if ((a & 0xfe00) == 0x5200) { // a15200
633 elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
634 ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d;
635 Pico32x.dirty_pal = 1;
640 elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
643 void PicoWrite16_32x(u32 a, u32 d)
645 if ((a & 0xfc00) == 0x5000)
646 elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
648 if ((a & 0xffc0) == 0x5100) { // a15100
649 p32x_reg_write16(a, d);
653 if (!(Pico32x.regs[0] & 1))
656 if ((a & 0xfff0) == 0x5180) { // a15180
657 p32x_vdp_write16(a, d);
661 if ((a & 0xfe00) == 0x5200) { // a15200
662 Pico32xMem->pal[(a & 0x1ff) / 2] = d;
663 Pico32x.dirty_pal = 1;
668 elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
671 // hint vector is writeable
672 static void PicoWrite8_hint(u32 a, u32 d)
674 if ((a & 0xfffc) == 0x0070) {
675 Pico32xMem->m68k_rom[a ^ 1] = d;
679 elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
682 static void PicoWrite16_hint(u32 a, u32 d)
684 if ((a & 0xfffc) == 0x0070) {
685 ((u16 *)Pico32xMem->m68k_rom)[a/2] = d;
689 elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
692 void Pico32xSwapDRAM(int b)
694 cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
695 cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
696 cpu68k_map_set(m68k_write8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
697 cpu68k_map_set(m68k_write16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0);
700 static void bank_switch(int b)
702 unsigned int rs, bank;
705 if (bank >= Pico.romsize) {
706 elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank);
710 // 32X ROM (unbanked, XXX: consider mirroring?)
711 rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
715 cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
716 cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0);
718 elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
721 // -----------------------------------------------------------------
723 // -----------------------------------------------------------------
725 u32 p32x_sh2_read8(u32 a, int id)
729 if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
730 return Pico32xMem->sh2_rom_m[a ^ 1];
731 if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
732 return Pico32xMem->sh2_rom_s[a ^ 1];
734 if ((a & 0xdffc0000) == 0x06000000)
735 return Pico32xMem->sdram[(a & 0x3ffff) ^ 1];
737 if ((a & 0xdfc00000) == 0x02000000)
738 if ((a & 0x003fffff) < Pico.romsize)
739 return Pico.rom[(a & 0x3fffff) ^ 1];
741 if ((a & ~0xfff) == 0xc0000000)
742 return Pico32xMem->data_array[id][(a & 0xfff) ^ 1];
744 if ((a & 0xdffc0000) == 0x04000000) {
745 /* XXX: overwrite readable as normal? */
746 u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
747 return dram[(a & 0x1ffff) ^ 1];
750 if ((a & 0xdfffff00) == 0x4000) {
751 d = p32x_sh2reg_read16(a, id);
755 if ((a & 0xdfffff00) == 0x4100) {
756 d = p32x_vdp_read16(a);
757 if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1))
762 if ((a & 0xdfffff00) == 0x4200) {
763 d = Pico32xMem->pal[(a & 0x1ff) / 2];
767 if ((a & 0xfffffe00) == 0xfffffe00)
768 return sh2_peripheral_read8(a, id);
770 elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x",
771 id ? 's' : 'm', a, d, sh2_pc(id));
780 elprintf(EL_32X, "%csh2 r8 [%08x] %02x @%06x",
781 id ? 's' : 'm', a, d, sh2_pc(id));
785 u32 p32x_sh2_read16(u32 a, int id)
789 if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
790 return *(u16 *)(Pico32xMem->sh2_rom_m + a);
791 if (id == 1 && a < sizeof(Pico32xMem->sh2_rom_s))
792 return *(u16 *)(Pico32xMem->sh2_rom_s + a);
794 if ((a & 0xdffc0000) == 0x06000000)
795 return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2];
797 if ((a & 0xdfc00000) == 0x02000000)
798 if ((a & 0x003fffff) < Pico.romsize)
799 return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2];
801 if ((a & ~0xfff) == 0xc0000000)
802 return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2];
804 if ((a & 0xdffe0000) == 0x04000000)
805 return Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2];
807 if ((a & 0xdfffff00) == 0x4000) {
808 d = p32x_sh2reg_read16(a, id);
809 if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM
814 if ((a & 0xdfffff00) == 0x4100) {
815 d = p32x_vdp_read16(a);
816 if (p32x_poll_detect(&sh2_poll[id], a, ash2_cycles_done(), 1))
821 if ((a & 0xdfffff00) == 0x4200) {
822 d = Pico32xMem->pal[(a & 0x1ff) / 2];
826 elprintf(EL_UIO, "%csh2 unmapped r16 [%08x] %04x @%06x",
827 id ? 's' : 'm', a, d, sh2_pc(id));
831 elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x",
832 id ? 's' : 'm', a, d, sh2_pc(id));
836 u32 p32x_sh2_read32(u32 a, int id)
838 if ((a & 0xfffffe00) == 0xfffffe00)
839 return sh2_peripheral_read32(a, id);
841 // elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc());
842 return (p32x_sh2_read16(a, id) << 16) | p32x_sh2_read16(a + 2, id);
845 void p32x_sh2_write8(u32 a, u32 d, int id)
847 if ((a & 0xdffffc00) == 0x4000)
848 elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x",
849 id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
851 if ((a & 0xdffc0000) == 0x06000000) {
852 Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d;
856 if ((a & 0xdffc0000) == 0x04000000) {
858 if (!(a & 0x20000) || d) {
859 dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
860 dram[(a & 0x1ffff) ^ 1] = d;
865 if ((a & ~0xfff) == 0xc0000000) {
866 Pico32xMem->data_array[id][(a & 0xfff) ^ 1] = d;
870 if ((a & 0xdfffff00) == 0x4100) {
871 p32x_vdp_write8(a, d);
875 if ((a & 0xdfffff00) == 0x4000) {
876 p32x_sh2reg_write8(a, d, id);
880 if ((a & 0xfffffe00) == 0xfffffe00) {
881 sh2_peripheral_write8(a, d, id);
885 elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x",
886 id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
889 void p32x_sh2_write16(u32 a, u32 d, int id)
891 if ((a & 0xdffffc00) == 0x4000 && ((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM
892 elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x",
893 id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
895 // ignore "Associative purge space"
896 if ((a & 0xf8000000) == 0x40000000)
899 if ((a & 0xdffc0000) == 0x06000000) {
900 ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d;
904 if ((a & ~0xfff) == 0xc0000000) {
905 ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2] = d;
909 if ((a & 0xdffc0000) == 0x04000000) {
910 u16 *pd = &Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2];
911 if (!(a & 0x20000)) {
916 if (!(d & 0xff00)) d |= *pd & 0xff00;
917 if (!(d & 0x00ff)) d |= *pd & 0x00ff;
922 if ((a & 0xdfffff00) == 0x4100) {
923 sh2_poll[id].cnt = 0; // for poll before VDP accesses
924 p32x_vdp_write16(a, d);
928 if ((a & 0xdffffe00) == 0x4200) {
929 Pico32xMem->pal[(a & 0x1ff) / 2] = d;
930 Pico32x.dirty_pal = 1;
934 if ((a & 0xdfffff00) == 0x4000) {
935 p32x_sh2reg_write16(a, d, id);
939 elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x",
940 id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
943 void p32x_sh2_write32(u32 a, u32 d, int id)
945 if ((a & 0xfffffe00) == 0xfffffe00) {
946 sh2_peripheral_write32(a, d, id);
950 p32x_sh2_write16(a, d >> 16, id);
951 p32x_sh2_write16(a + 2, d, id);
954 #define HWSWAP(x) (((x) << 16) | ((x) >> 16))
955 void PicoMemSetup32x(void)
962 Pico32xMem = calloc(1, sizeof(*Pico32xMem));
963 if (Pico32xMem == NULL) {
964 elprintf(EL_STATUS, "OOM");
968 dmac0 = (void *)&Pico32xMem->sh2_peri_regs[0][0x180 / 4];
971 ps = (unsigned short *)Pico32xMem->m68k_rom;
972 pl = (unsigned int *)Pico32xMem->m68k_rom;
973 for (i = 1; i < 0xc0/4; i++)
974 pl[i] = HWSWAP(0x880200 + (i - 1) * 6);
977 for (i = 0xc0/2; i < 0x100/2; i++)
982 ps[0xc2/2] = 0x2700; // move #0x2700,sr
983 ps[0xfe/2] = 0x60fe; // jump to self
985 ps[0xfe/2] = 0x4e75; // rts
988 // fill remaining mem with ROM
989 memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100);
994 FILE *f = fopen("32X_M_BIOS.BIN", "rb");
997 printf("missing 32X_M_BIOS.BIN\n");
1000 fread(Pico32xMem->sh2_rom_m, 1, sizeof(Pico32xMem->sh2_rom_m), f);
1002 f = fopen("32X_S_BIOS.BIN", "rb");
1004 printf("missing 32X_S_BIOS.BIN\n");
1007 fread(Pico32xMem->sh2_rom_s, 1, sizeof(Pico32xMem->sh2_rom_s), f);
1010 for (i = 0; i < sizeof(Pico32xMem->sh2_rom_m); i += 2) {
1011 int t = Pico32xMem->sh2_rom_m[i];
1012 Pico32xMem->sh2_rom_m[i] = Pico32xMem->sh2_rom_m[i + 1];
1013 Pico32xMem->sh2_rom_m[i + 1] = t;
1015 for (i = 0; i < sizeof(Pico32xMem->sh2_rom_s); i += 2) {
1016 int t = Pico32xMem->sh2_rom_s[i];
1017 Pico32xMem->sh2_rom_s[i] = Pico32xMem->sh2_rom_s[i + 1];
1018 Pico32xMem->sh2_rom_s[i + 1] = t;
1022 // cartridge area becomes unmapped
1023 // XXX: we take the easy way and don't unmap ROM,
1024 // so that we can avoid handling the RV bit.
1025 // m68k_map_unmap(0x000000, 0x3fffff);
1028 rs = sizeof(Pico32xMem->m68k_rom);
1029 cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
1030 cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom, 0);
1031 cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify
1032 cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1);
1037 // 32X ROM (unbanked, XXX: consider mirroring?)
1038 rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
1041 cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
1042 cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0);
1047 // setup poll detector
1048 m68k_poll.flag = P32XF_68KPOLL;
1049 m68k_poll.cyc_max = 64;
1050 sh2_poll[0].flag = P32XF_MSH2POLL;
1051 sh2_poll[0].cyc_max = 16;
1052 sh2_poll[1].flag = P32XF_SSH2POLL;
1053 sh2_poll[1].cyc_max = 16;