diff options
| -rw-r--r-- | vdp.c | 8 |
1 files changed, 5 insertions, 3 deletions
@@ -518,13 +518,15 @@ void vdp_advance_dma(vdp_context * context) context->cd &= 0xF; } } - +#include <assert.h> void write_vram_byte(vdp_context *context, uint16_t address, uint8_t value) { if (!(address & 4)) { uint16_t sat_address = (context->regs[REG_SAT] & 0x7F) << 9; - if(address >= sat_address && address <= sat_address + SAT_CACHE_SIZE*2) { - context->sat_cache[(address & 3) | (address >> 1 & 0x1FC)] = value; + if(address >= sat_address && address < (sat_address + SAT_CACHE_SIZE*2)) { + uint16_t cache_address = address - sat_address; + cache_address = (cache_address & 3) | (cache_address >> 1 & 0x1FC); + context->sat_cache[cache_address] = value; } } context->vdpmem[address] = value; |