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SNES: Change base capacity to 0xf800 bytes instead of 0x10000

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This is to reflect both source address calculations in the engine code, which assume an echo buffer to end at 0xf800
This commit is contained in:
Natt Akuma 2024-11-27 18:37:39 +07:00
parent d8d12fa215
commit ddb29874d7
1 changed files with 5 additions and 3 deletions
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8
src/engine/platform/snes.cpp
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@ -841,7 +841,7 @@ void DivPlatformSNES::initEcho() {
for (DivMemoryEntry& i: memCompo.entries) { for (DivMemoryEntry& i: memCompo.entries) {
if (i.type==DIV_MEMORY_ECHO) { if (i.type==DIV_MEMORY_ECHO) {
i.begin=(65536-echoDelay*2048); i.begin=(0xf800-echoDelay*2048);
} }
} }
memCompo.used=sampleMemLen+echoDelay*2048; memCompo.used=sampleMemLen+echoDelay*2048;
@ -946,7 +946,7 @@ const void* DivPlatformSNES::getSampleMem(int index) {
} }
size_t DivPlatformSNES::getSampleMemCapacity(int index) { size_t DivPlatformSNES::getSampleMemCapacity(int index) {
return index == 0 ? (65536-echoDelay*2048) : 0; return index == 0 ? (0xf800-echoDelay*2048) : 0;
} }
size_t DivPlatformSNES::getSampleMemUsage(int index) { size_t DivPlatformSNES::getSampleMemUsage(int index) {
@ -1010,7 +1010,9 @@ void DivPlatformSNES::renderSamples(int sysID) {
} }
sampleMemLen=memPos; sampleMemLen=memPos;
memCompo.entries.push_back(DivMemoryEntry(DIV_MEMORY_ECHO,"Echo Buffer",-1,(65536-echoDelay*2048),65536)); // even if the delay is 0, the DSP will still operate the first buffer sample
// so the ARAM buffer size becomes 4 bytes when the delay is 0
memCompo.entries.push_back(DivMemoryEntry(DIV_MEMORY_ECHO,"Echo Buffer",-1,(0xf800-echoDelay*2048),echoDelay==0?0xf804:0xf800));
memCompo.capacity=65536; memCompo.capacity=65536;
memCompo.used=sampleMemLen+echoDelay*2048; memCompo.used=sampleMemLen+echoDelay*2048;