+static void bank_switch(int b)
+{
+ unsigned int rs, bank;
+
+ bank = b << 20;
+ if (bank >= Pico.romsize) {
+ elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank);
+ return;
+ }
+
+ // 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_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
+}
+
+// -----------------------------------------------------------------
+// SH2
+// -----------------------------------------------------------------
+
+u32 p32x_sh2_read8(u32 a, int id)
+{
+ u32 d = 0;
+
+ 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];
+
+ if ((a & 0x0ffc0000) == 0x06000000)
+ return Pico32xMem->sdram[(a & 0x3ffff) ^ 1];
+
+ if ((a & 0x0fc00000) == 0x02000000)
+ if ((a & 0x003fffff) < Pico.romsize)
+ return Pico.rom[(a & 0x3fffff) ^ 1];
+
+ if ((a & ~0xfff) == 0xc0000000)
+ return Pico32xMem->data_array[id][(a & 0xfff) ^ 1];
+
+ if ((a & 0x0fffff00) == 0x4000) {
+ d = p32x_sh2reg_read16(a, id);
+ goto out_16to8;
+ }
+
+ if ((a & 0x0fffff00) == 0x4100) {
+ d = p32x_vdp_read16(a);
+ if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
+ ash2_end_run(8);
+ goto out_16to8;
+ }
+
+ if ((a & 0x0fffff00) == 0x4200) {
+ d = Pico32xMem->pal[(a & 0x1ff) / 2];
+ goto out_16to8;
+ }
+
+ elprintf(EL_UIO, "%csh2 unmapped r8 [%08x] %02x @%06x",
+ id ? 's' : 'm', a, d, sh2_pc(id));
+ return d;
+
+out_16to8:
+ if (a & 1)
+ d &= 0xff;
+ else
+ d >>= 8;
+
+ elprintf(EL_32X, "%csh2 r8 [%08x] %02x @%06x",
+ id ? 's' : 'm', a, d, sh2_pc(id));
+ return d;
+}
+
+u32 p32x_sh2_read16(u32 a, int id)
+{
+ 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);
+
+ if ((a & 0x0ffc0000) == 0x06000000)
+ return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2];
+
+ if ((a & 0x0fc00000) == 0x02000000)
+ if ((a & 0x003fffff) < Pico.romsize)
+ return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2];
+
+ if ((a & ~0xfff) == 0xc0000000)
+ return ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2];
+
+ if ((a & 0x0fffff00) == 0x4000) {
+ d = p32x_sh2reg_read16(a, id);
+ goto out;
+ }
+
+ if ((a & 0x0fffff00) == 0x4100) {
+ d = p32x_vdp_read16(a);
+ if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
+ ash2_end_run(8);
+ goto out;
+ }
+
+ if ((a & 0x0fffff00) == 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;
+
+out:
+ elprintf(EL_32X, "%csh2 r16 [%08x] %04x @%06x",
+ id ? 's' : 'm', a, d, sh2_pc(id));
+ return d;
+}
+
+u32 p32x_sh2_read32(u32 a, int id)
+{
+ if ((a & 0xfffffe00) == 0xfffffe00)
+ return sh2_peripheral_read(a, id);
+
+// 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);
+}
+
+void p32x_sh2_write8(u32 a, u32 d, int id)
+{
+ if ((a & 0x0ffffc00) == 0x4000)
+ elprintf(EL_32X, "%csh2 w8 [%08x] %02x @%06x",
+ id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
+
+ if ((a & 0x0ffc0000) == 0x06000000) {
+ Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d;
+ return;
+ }
+
+ if ((a & 0x0ffe0000) == 0x04000000) {
+ u8 *dram = (u8 *)Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1];
+ dram[(a & 0x1ffff) ^ 1] = d;
+ return;
+ }
+
+ if ((a & ~0xfff) == 0xc0000000) {
+ Pico32xMem->data_array[id][(a & 0xfff) ^ 1] = d;
+ return;
+ }
+
+ if ((a & 0x0fffff00) == 0x4100) {
+ p32x_vdp_write8(a, d);
+ return;
+ }
+
+ if ((a & 0x0fffff00) == 0x4000) {
+ p32x_sh2reg_write8(a, d, id);
+ return;
+ }
+
+ elprintf(EL_UIO, "%csh2 unmapped w8 [%08x] %02x @%06x",
+ id ? 's' : 'm', a, d & 0xff, sh2_pc(id));
+}
+
+void p32x_sh2_write16(u32 a, u32 d, int id)
+{
+ if ((a & 0x0ffffc00) == 0x4000)
+ elprintf(EL_32X, "%csh2 w16 [%08x] %04x @%06x",
+ id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
+
+ if ((a & 0x0ffc0000) == 0x06000000) {
+ ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d;
+ return;
+ }
+
+ if ((a & ~0xfff) == 0xc0000000) {
+ ((u16 *)Pico32xMem->data_array[id])[(a & 0xfff) / 2] = d;
+ return;
+ }
+
+ if ((a & 0x0ffe0000) == 0x04000000) {
+ Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1][(a & 0x1ffff) / 2] = d;
+ return;
+ }
+
+ if ((a & 0x0fffff00) == 0x4100) {
+ p32x_vdp_write16(a, d);
+ return;
+ }
+
+ if ((a & 0x0ffffe00) == 0x4200) {
+ Pico32xMem->pal[(a & 0x1ff) / 2] = d;
+ Pico32x.dirty_pal = 1;
+ return;
+ }
+
+ if ((a & 0x0fffff00) == 0x4000) {
+ p32x_sh2reg_write16(a, d, id);
+ return;
+ }
+
+ elprintf(EL_UIO, "%csh2 unmapped w16 [%08x] %04x @%06x",
+ id ? 's' : 'm', a, d & 0xffff, sh2_pc(id));
+}
+
+void p32x_sh2_write32(u32 a, u32 d, int id)
+{
+ if ((a & 0xfffffe00) == 0xfffffe00) {
+ sh2_peripheral_write(a, d, id);
+ return;
+ }
+
+ p32x_sh2_write16(a, d >> 16, id);
+ p32x_sh2_write16(a + 2, d, id);
+}
+