diff options
Diffstat (limited to 'blastem.c')
| -rw-r--r-- | blastem.c | 27 |
1 files changed, 25 insertions, 2 deletions
@@ -701,6 +701,27 @@ m68k_context * io_read_w(uint32_t location, m68k_context * context) return context; } +z80_context * z80_write_ym(uint16_t location, z80_context * context, uint8_t value) +{ + genesis_context * gen = context->system; + ym_run(gen->ym, (context->current_cycle * MCLKS_PER_Z80) / MCLKS_PER_68K); + if (location & 1) { + ym_data_write(gen->ym, value); + } else if (location & 2) { + ym_address_write_part2(gen->ym, value); + } else { + ym_address_write_part1(gen->ym, value); + } + return context; +} + +uint8_t z80_read_ym(uint16_t location, z80_context * context) +{ + genesis_context * gen = context->system; + ym_run(gen->ym, (context->current_cycle * MCLKS_PER_Z80) / MCLKS_PER_68K); + return ym_read_status(gen->ym); +} + typedef struct bp_def { struct bp_def * next; uint32_t address; @@ -1015,13 +1036,15 @@ int main(int argc, char ** argv) x86_z80_options z_opts; init_x86_z80_opts(&z_opts); init_z80_context(&z_context, &z_opts); - z_context.next_context = &v_context; + + genesis_context gen; + + z_context.system = &gen; z_context.mem_pointers[0] = z80_ram; z_context.sync_cycle = z_context.target_cycle = MCLKS_PER_FRAME/MCLKS_PER_Z80; z_context.int_cycle = CYCLE_NEVER; z_context.mem_pointers[1] = z_context.mem_pointers[2] = (uint8_t *)cart; - genesis_context gen; gen.z80 = &z_context; gen.vdp = &v_context; gen.ym = &y_context; |