otomatalabs/furnace
8
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

AY: add effects to write to I/O ports

Browse source
This commit is contained in:
tildearrow 2022-03-26 20:55:43 -05:00
parent e143359b74
commit 73536c0691
7 changed files with 128 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

14
src/engine/playback.cpp
View file

@ -109,6 +109,8 @@ const char* cmdName[DIV_CMD_MAX]={
"AY_NOISE_MASK_AND",
"AY_NOISE_MASK_OR",
"AY_AUTO_ENVELOPE",
"AY_IO_WRITE",
"AY_AUTO_PWM",
"SAA_ENVELOPE",
@ -613,6 +615,12 @@ bool DivEngine::perSystemPostEffect(int ch, unsigned char effect, unsigned char
case 0x29: // auto-envelope
dispatchCmd(DivCommand(DIV_CMD_AY_AUTO_ENVELOPE,ch,effectVal));
break;
case 0x2e: // I/O port A
dispatchCmd(DivCommand(DIV_CMD_AY_IO_WRITE,ch,0,effectVal));
break;
case 0x2f: // I/O port B
dispatchCmd(DivCommand(DIV_CMD_AY_IO_WRITE,ch,1,effectVal));
break;
default:
return false;
}
@ -1031,6 +1039,12 @@ void DivEngine::processRow(int i, bool afterDelay) {
chan[i].inPorta=false;
if (!song.arpNonPorta) dispatchCmd(DivCommand(DIV_CMD_PRE_PORTA,i,false,0));
break;
case 0xf3: // fine volume ramp up
chan[i].volSpeed=effectVal;
break;
case 0xf4: // fine volume ramp down
chan[i].volSpeed=-effectVal;
break;
case 0xf8: // single volume ramp up
chan[i].volume=MIN(chan[i].volume+effectVal*256,chan[i].volMax);
dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));