Mercurial > repos > blastem
diff blastem.c @ 357:fa7ea48be9a9
Allow VDP/PSG writes from Z80
author | Mike Pavone <pavone@retrodev.com> |
---|---|
date | Fri, 24 May 2013 00:26:27 -0700 |
parents | 79e4b466e7d0 |
children | 9498cfa7f7c8 |
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--- a/blastem.c Thu May 23 23:55:42 2013 -0700 +++ b/blastem.c Fri May 24 00:26:27 2013 -0700 @@ -333,7 +333,14 @@ m68k_context * vdp_port_write_b(uint32_t vdp_port, m68k_context * context, uint8_t value) { - return vdp_port_write(vdp_port, context, vdp_port < 0x10 ? value | value << 8 : value); + return vdp_port_write(vdp_port, context, vdp_port < 0x10 ? value | value << 8 : ((vdp_port & 1) ? value : 0)); +} + +z80_context * z80_vdp_port_write(uint16_t vdp_port, z80_context * context, uint8_t value) +{ + genesis_context * gen = context->system; + vdp_port_write_b(vdp_port, gen->m68k, value); + return context; } uint16_t vdp_port_read(uint32_t vdp_port, m68k_context * context)