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annotate multi_game.c @ 1442:59e1dbb795a7

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Update README in anticipation of 0.5.1 release
author Michael Pavone <pavone@retrodev.com>
date Fri, 25 Aug 2017 20:12:21 -0700
parents 11ac0b511cff
children 14a2834d010c
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1416
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1 #include "genesis.h"
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2
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3 void *write_multi_game_b(uint32_t address, void *vcontext, uint8_t value)
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4 {
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5 m68k_context *context = vcontext;
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6 genesis_context *gen = context->system;
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7 uint32_t base = (address & 0x3F) << 16, start = 0, end = 0x400000;
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8 //find the memmap chunk, so we can properly mask the base value
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9 for (int i = 0; i < context->options->gen.memmap_chunks; i++)
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10 {
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11 if (context->options->gen.memmap[i].flags & MMAP_PTR_IDX) {
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12 base &= context->options->gen.memmap[i].mask;
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13 start = context->options->gen.memmap[i].start;
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14 end = context->options->gen.memmap[i].end;
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15 break;
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16 }
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17 }
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18 context->mem_pointers[gen->mapper_start_index] = gen->cart + base/2;
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19 m68k_invalidate_code_range(context, start, end);
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20 return vcontext;
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21 }
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22
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23 void *write_multi_game_w(uint32_t address, void *context, uint16_t value)
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24 {
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25 return write_multi_game_b(address, context, value);
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26 }