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C219: chip config and proper clock rate

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This commit is contained in:
tildearrow 2023-08-28 18:37:35 -05:00
parent 35faa8c23c
commit 9cb239438e
3 changed files with 22 additions and 3 deletions
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22
src/engine/platform/c140.cpp
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@ -639,10 +639,26 @@ void DivPlatformC140::set219(bool is_219) {
totalChans=is219?16:24;
}
int DivPlatformC140::getClockRangeMin() {
if (is219) return 1000000;
return MIN_CUSTOM_CLOCK;
}
int DivPlatformC140::getClockRangeMax() {
if (is219) return 100000000;
return MAX_CUSTOM_CLOCK;
}
void DivPlatformC140::setFlags(const DivConfig& flags) {
chipClock=32000*256; // 8.192MHz and 12.288MHz input, verified from Assault Schematics
CHECK_CUSTOM_CLOCK;
rate=chipClock/192;
if (is219) {
chipClock=50113000; // 50.113MHz clock input in Namco NA-1/NA-2 PCB
CHECK_CUSTOM_CLOCK;
rate=chipClock/1136; // assumed as ~44100hz
} else {
chipClock=32000*256; // 8.192MHz and 12.288MHz input, verified from Assault Schematics
CHECK_CUSTOM_CLOCK;
rate=chipClock/192;
}
for (int i=0; i<totalChans; i++) {
oscBuf[i]->rate=rate;
}