Mercurial > repos > blastem
comparison multi_game.c @ 1416:11ac0b511cff
Support a couple of bootleg X-in-1 carts
author | Michael Pavone <pavone@retrodev.com> |
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date | Sat, 24 Jun 2017 13:55:54 -0700 |
parents | |
children | 14a2834d010c |
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1415:f7d653bb8899 | 1416:11ac0b511cff |
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1 #include "genesis.h" | |
2 | |
3 void *write_multi_game_b(uint32_t address, void *vcontext, uint8_t value) | |
4 { | |
5 m68k_context *context = vcontext; | |
6 genesis_context *gen = context->system; | |
7 uint32_t base = (address & 0x3F) << 16, start = 0, end = 0x400000; | |
8 //find the memmap chunk, so we can properly mask the base value | |
9 for (int i = 0; i < context->options->gen.memmap_chunks; i++) | |
10 { | |
11 if (context->options->gen.memmap[i].flags & MMAP_PTR_IDX) { | |
12 base &= context->options->gen.memmap[i].mask; | |
13 start = context->options->gen.memmap[i].start; | |
14 end = context->options->gen.memmap[i].end; | |
15 break; | |
16 } | |
17 } | |
18 context->mem_pointers[gen->mapper_start_index] = gen->cart + base/2; | |
19 m68k_invalidate_code_range(context, start, end); | |
20 return vcontext; | |
21 } | |
22 | |
23 void *write_multi_game_w(uint32_t address, void *context, uint16_t value) | |
24 { | |
25 return write_multi_game_b(address, context, value); | |
26 } |