From c21c73853ca656be57011cdb0c2e7b9da1dac5df Mon Sep 17 00:00:00 2001 From: Michael Pavone Date: Sat, 24 Jun 2017 13:55:54 -0700 Subject: Support a couple of bootleg X-in-1 carts --- multi_game.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 multi_game.c (limited to 'multi_game.c') diff --git a/multi_game.c b/multi_game.c new file mode 100644 index 0000000..c00aada --- /dev/null +++ b/multi_game.c @@ -0,0 +1,26 @@ +#include "genesis.h" + +void *write_multi_game_b(uint32_t address, void *vcontext, uint8_t value) +{ + m68k_context *context = vcontext; + genesis_context *gen = context->system; + uint32_t base = (address & 0x3F) << 16, start = 0, end = 0x400000; + //find the memmap chunk, so we can properly mask the base value + for (int i = 0; i < context->options->gen.memmap_chunks; i++) + { + if (context->options->gen.memmap[i].flags & MMAP_PTR_IDX) { + base &= context->options->gen.memmap[i].mask; + start = context->options->gen.memmap[i].start; + end = context->options->gen.memmap[i].end; + break; + } + } + context->mem_pointers[gen->mapper_start_index] = gen->cart + base/2; + m68k_invalidate_code_range(context, start, end); + return vcontext; +} + +void *write_multi_game_w(uint32_t address, void *context, uint16_t value) +{ + return write_multi_game_b(address, context, value); +} -- cgit v1.2.3