etc/furnace
0
0
Fork 0
mirror of https://github.com/tildearrow/furnace.git synced 2024-11-26 22:43:01 +00:00
Code Issues Projects Releases Packages Wiki Activity

Amiga: better emulation, part 10

Browse source
This commit is contained in:
tildearrow 2023-03-11 03:47:33 -05:00
parent a9c703df3e
commit 5ebee2bb2b
2 changed files with 23 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
src/engine/platform/amiga.cpp
View file

@ -86,7 +86,9 @@ void DivPlatformAmiga::acquire(short** buf, size_t len) {
outL=0;
outR=0;
// NEW CODE
// TODO:
// - improve DMA overrun behavior
// - does V/P mod really work like that?
amiga.volPos=(amiga.volPos+1)&AMIGA_VPMASK;
if (!bypassLimits) {
amiga.hPos+=AMIGA_DIVIDER;
@ -475,6 +477,22 @@ void DivPlatformAmiga::tick(bool sysTick) {
updateWave(i);
}
}
if (updateADKCon) {
updateADKCon=false;
rWrite(0x9e,0xff);
rWrite(0x9e,(
0x8000|
(chan[0].useV?1:0)|
(chan[1].useV?2:0)|
(chan[2].useV?4:0)|
(chan[3].useV?8:0)|
(chan[0].useP?16:0)|
(chan[1].useP?32:0)|
(chan[2].useP?64:0)|
(chan[3].useP?128:0)
));
}
}
int DivPlatformAmiga::dispatch(DivCommand c) {
@ -618,9 +636,11 @@ int DivPlatformAmiga::dispatch(DivCommand c) {
break;
case DIV_CMD_AMIGA_AM:
chan[c.chan].useV=c.value;
updateADKCon=true;
break;
case DIV_CMD_AMIGA_PM:
chan[c.chan].useP=c.value;
updateADKCon=true;
break;
case DIV_CMD_GET_VOLMAX:
return 64;
@ -677,6 +697,7 @@ void DivPlatformAmiga::reset() {
}
filterOn=false;
filtConst=filterOn?filtConstOn:filtConstOff;
updateADKCon=true;
amiga=Amiga();
// enable DMA

1
src/engine/platform/amiga.h
View file

@ -59,6 +59,7 @@ class DivPlatformAmiga: public DivDispatch {
bool bypassLimits;
bool amigaModel;
bool filterOn;
bool updateADKCon;
struct Amiga {
// register state