mirrors/Bochs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fixed and simplified DMA timer value calculation

Browse Source
This commit is contained in:
Volker Ruppert 2013-07-07 19:19:59 +00:00
parent 258505a762
commit f91aa29f2b
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
bochs/iodev/sound/sb16.cc
View File

@ -1248,11 +1248,10 @@ void bx_sb16_c::dsp_dma(Bit8u command, Bit8u mode, Bit16u length, Bit8u comp)
Bit32u sampledatarate = (Bit32u) DSP.dma.samplerate * (Bit32u) DSP.dma.bps;
if ((DSP.dma.bits == 16) && (BX_SB16_DMAH != 0)) {
DSP.dma.count = (DSP.dma.blocklength + 1) * (DSP.dma.bps / 2) - 1;
DSP.dma.timer = BX_SB16_THIS dmatimer / (sampledatarate / 2) * BX_DMA_BUFFER_SIZE;
} else {
DSP.dma.count = (DSP.dma.blocklength + 1) * DSP.dma.bps - 1;
DSP.dma.timer = BX_SB16_THIS dmatimer / sampledatarate * BX_DMA_BUFFER_SIZE;
}
DSP.dma.timer = BX_SB16_THIS dmatimer * BX_DMA_BUFFER_SIZE / sampledatarate;
writelog(WAVELOG(5), "DMA is %db, %dHz, %s, %s, mode %d, %s, %s, %d bps, %d usec/DMA",
DSP.dma.bits, DSP.dma.samplerate, (DSP.dma.stereo != 0)?"stereo":"mono",