add lowlevel tandy dac implementation
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3431
This commit is contained in:
Sebastian Strohhäcker
parent
a4d747c681
commit
704221c89d
3 changed files with 370 additions and 69 deletions
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@ -16,7 +16,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* $Id: bios.cpp,v 1.76 2009-06-11 16:05:17 c2woody Exp $ */
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/* $Id: bios.cpp,v 1.77 2009-06-23 17:46:05 c2woody Exp $ */
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#include "dosbox.h"
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#include "mem.h"
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@ -70,6 +70,11 @@ static struct {
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Bit8u irq;
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Bit8u dma;
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} tandy_sb;
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static struct {
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Bit16u port;
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Bit8u irq;
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Bit8u dma;
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} tandy_dac;
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static bool Tandy_InitializeSB() {
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/* see if soundblaster module available and at what port/IRQ/DMA */
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@ -86,14 +91,33 @@ static bool Tandy_InitializeSB() {
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}
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}
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static bool Tandy_InitializeTS() {
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/* see if Tandy DAC module available and at what port/IRQ/DMA */
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Bitu tsport, tsirq, tsdma;
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if (TS_Get_Address(tsport, tsirq, tsdma)) {
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tandy_dac.port=(Bit16u)(tsport&0xffff);
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tandy_dac.irq =(Bit8u)(tsirq&0xff);
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tandy_dac.dma =(Bit8u)(tsdma&0xff);
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return true;
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} else {
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/* no Tandy DAC accessible */
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tandy_dac.port=0;
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return false;
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}
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}
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/* check if Tandy DAC is still playing */
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static bool Tandy_TransferInProgress(void) {
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if (real_readw(0x40,0xd0)) return true; /* not yet done */
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if (real_readb(0x40,0xd4)==0xff) return false; /* still in init-state */
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Bit8u tandy_dma = 1;
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if (tandy_sb.port) tandy_dma = tandy_sb.dma;
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else if (tandy_dac.port) tandy_dma = tandy_dac.dma;
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IO_Write(0x0c,0x00);
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Bit16u datalen=(Bit8u)(IO_ReadB(tandy_sb.dma*2+1)&0xff);
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datalen|=(IO_ReadB(tandy_sb.dma*2+1)<<8);
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Bit16u datalen=(Bit8u)(IO_ReadB(tandy_dma*2+1)&0xff);
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datalen|=(IO_ReadB(tandy_dma*2+1)<<8);
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if (datalen==0xffff) return false; /* no DMA transfer */
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else if ((datalen<0x10) && (real_readb(0x40,0xd4)==0x0f) && (real_readw(0x40,0xd2)==0x1c)) {
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/* stop already requested */
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@ -106,27 +130,44 @@ static void Tandy_SetupTransfer(PhysPt bufpt,bool isplayback) {
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Bitu length=real_readw(0x40,0xd0);
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if (length==0) return; /* nothing to do... */
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if (tandy_sb.port==0) return;
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if ((tandy_sb.port==0) && (tandy_dac.port==0)) return;
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Bit8u tandy_irq = 7;
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if (tandy_sb.port) tandy_irq = tandy_sb.irq;
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else if (tandy_dac.port) tandy_irq = tandy_dac.irq;
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Bit8u tandy_irq_vector = tandy_irq;
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if (tandy_irq_vector<8) tandy_irq_vector += 8;
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else tandy_irq_vector += (0x70-8);
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/* revector IRQ-handler if necessary */
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RealPt current_irq=RealGetVec(tandy_sb.irq+8);
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RealPt current_irq=RealGetVec(tandy_irq_vector);
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if (current_irq!=tandy_DAC_callback[0]->Get_RealPointer()) {
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real_writed(0x40,0xd6,current_irq);
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RealSetVec(tandy_sb.irq+8,tandy_DAC_callback[0]->Get_RealPointer());
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RealSetVec(tandy_irq_vector,tandy_DAC_callback[0]->Get_RealPointer());
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}
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IO_Write(tandy_sb.port+0xc,0xd0); /* stop DMA transfer */
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IO_Write(0x21,IO_Read(0x21)&(~(1<<tandy_sb.irq))); /* unmask IRQ */
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IO_Write(tandy_sb.port+0xc,0xd1); /* turn speaker on */
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IO_Write(0x0a,0x04|tandy_sb.dma); /* mask DMA channel */
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IO_Write(0x0c,0x00); /* clear DMA flipflop */
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if (isplayback) IO_Write(0x0b,0x48|tandy_sb.dma);
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else IO_Write(0x0b,0x44|tandy_sb.dma);
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Bit8u tandy_dma = 1;
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if (tandy_sb.port) tandy_dma = tandy_sb.dma;
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else if (tandy_dac.port) tandy_dma = tandy_dac.dma;
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if (tandy_sb.port) {
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IO_Write(tandy_sb.port+0xc,0xd0); /* stop DMA transfer */
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IO_Write(0x21,IO_Read(0x21)&(~(1<<tandy_irq))); /* unmask IRQ */
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IO_Write(tandy_sb.port+0xc,0xd1); /* turn speaker on */
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} else {
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IO_Write(tandy_dac.port,IO_Read(tandy_dac.port)&0x60); /* disable DAC */
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IO_Write(0x21,IO_Read(0x21)&(~(1<<tandy_irq))); /* unmask IRQ */
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}
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IO_Write(0x0a,0x04|tandy_dma); /* mask DMA channel */
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IO_Write(0x0c,0x00); /* clear DMA flipflop */
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if (isplayback) IO_Write(0x0b,0x48|tandy_dma);
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else IO_Write(0x0b,0x44|tandy_dma);
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/* set physical address of buffer */
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Bit8u bufpage=(Bit8u)((bufpt>>16)&0xff);
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IO_Write(tandy_sb.dma*2,(Bit8u)(bufpt&0xff));
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IO_Write(tandy_sb.dma*2,(Bit8u)((bufpt>>8)&0xff));
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switch (tandy_sb.dma) {
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IO_Write(tandy_dma*2,(Bit8u)(bufpt&0xff));
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IO_Write(tandy_dma*2,(Bit8u)((bufpt>>8)&0xff));
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switch (tandy_dma) {
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case 0: IO_Write(0x87,bufpage); break;
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case 1: IO_Write(0x83,bufpage); break;
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case 2: IO_Write(0x81,bufpage); break;
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@ -141,20 +182,31 @@ static void Tandy_SetupTransfer(PhysPt bufpt,bool isplayback) {
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tlength--;
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/* set transfer size */
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IO_Write(tandy_sb.dma*2+1,(Bit8u)(tlength&0xff));
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IO_Write(tandy_sb.dma*2+1,(Bit8u)((tlength>>8)&0xff));
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IO_Write(0x0a,tandy_sb.dma); /* enable DMA channel */
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IO_Write(tandy_dma*2+1,(Bit8u)(tlength&0xff));
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IO_Write(tandy_dma*2+1,(Bit8u)((tlength>>8)&0xff));
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Bit16u delay=(Bit16u)(real_readw(0x40,0xd2)&0xfff);
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/* set frequency */
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IO_Write(tandy_sb.port+0xc,0x40);
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IO_Write(tandy_sb.port+0xc,256-delay*100/358);
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/* set playback type to 8bit */
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if (isplayback) IO_Write(tandy_sb.port+0xc,0x14);
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else IO_Write(tandy_sb.port+0xc,0x24);
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/* set transfer size */
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IO_Write(tandy_sb.port+0xc,(Bit8u)(tlength&0xff));
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IO_Write(tandy_sb.port+0xc,(Bit8u)((tlength>>8)&0xff));
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Bit8u amplitude=(Bit8u)((real_readw(0x40,0xd2)>>13)&0x7);
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if (tandy_sb.port) {
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IO_Write(0x0a,tandy_dma); /* enable DMA channel */
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/* set frequency */
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IO_Write(tandy_sb.port+0xc,0x40);
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IO_Write(tandy_sb.port+0xc,256-delay*100/358);
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/* set playback type to 8bit */
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if (isplayback) IO_Write(tandy_sb.port+0xc,0x14);
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else IO_Write(tandy_sb.port+0xc,0x24);
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/* set transfer size */
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IO_Write(tandy_sb.port+0xc,(Bit8u)(tlength&0xff));
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IO_Write(tandy_sb.port+0xc,(Bit8u)((tlength>>8)&0xff));
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} else {
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if (isplayback) IO_Write(tandy_dac.port,(IO_Read(tandy_dac.port)&0x7c) | 0x03);
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else IO_Write(tandy_dac.port,(IO_Read(tandy_dac.port)&0x7c) | 0x02);
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IO_Write(tandy_dac.port+2,(Bit8u)(delay&0xff));
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IO_Write(tandy_dac.port+3,(Bit8u)(((delay>>8)&0xf) | (amplitude<<5)));
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if (isplayback) IO_Write(tandy_dac.port,(IO_Read(tandy_dac.port)&0x7c) | 0x1f);
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else IO_Write(tandy_dac.port,(IO_Read(tandy_dac.port)&0x7c) | 0x1e);
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IO_Write(0x0a,tandy_dma); /* enable DMA channel */
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}
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if (!isplayback) {
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/* mark transfer as recording operation */
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@ -163,10 +215,15 @@ static void Tandy_SetupTransfer(PhysPt bufpt,bool isplayback) {
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}
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static Bitu IRQ_TandyDAC(void) {
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if (tandy_dac.port) {
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IO_Read(tandy_dac.port);
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}
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if (real_readw(0x40,0xd0)) { /* play/record next buffer */
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/* acknowledge IRQ */
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IO_Write(0x20,0x20);
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IO_Read(tandy_sb.port+0xe);
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if (tandy_sb.port) {
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IO_Read(tandy_sb.port+0xe);
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}
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/* buffer starts at the next page */
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Bit8u npage=real_readb(0x40,0xd4)+1;
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@ -182,11 +239,20 @@ static Bitu IRQ_TandyDAC(void) {
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Tandy_SetupTransfer(npage<<16,true);
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}
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} else { /* playing/recording is finished */
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RealSetVec(tandy_sb.irq+8,real_readd(0x40,0xd6));
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Bit8u tandy_irq = 7;
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if (tandy_sb.port) tandy_irq = tandy_sb.irq;
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else if (tandy_dac.port) tandy_irq = tandy_dac.irq;
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Bit8u tandy_irq_vector = tandy_irq;
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if (tandy_irq_vector<8) tandy_irq_vector += 8;
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else tandy_irq_vector += (0x70-8);
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RealSetVec(tandy_irq_vector,real_readd(0x40,0xd6));
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/* turn off speaker and acknowledge soundblaster IRQ */
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IO_Write(tandy_sb.port+0xc,0xd3);
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IO_Read(tandy_sb.port+0xe);
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if (tandy_sb.port) {
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IO_Write(tandy_sb.port+0xc,0xd3);
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IO_Read(tandy_sb.port+0xe);
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}
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/* issue BIOS tandy sound device busy callout */
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SegSet16(cs, RealSeg(tandy_DAC_callback[1]->Get_RealPointer()));
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@ -196,10 +262,14 @@ static Bitu IRQ_TandyDAC(void) {
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}
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static void TandyDAC_Handler(Bit8u tfunction) {
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if (!tandy_sb.port) return;
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if ((!tandy_sb.port) && (!tandy_dac.port)) return;
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switch (tfunction) {
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case 0x81: /* Tandy sound system check */
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reg_ax=0xc4;
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if (tandy_dac.port) {
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reg_ax=tandy_dac.port;
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} else {
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reg_ax=0xc4;
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}
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CALLBACK_SCF(Tandy_TransferInProgress());
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break;
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case 0x82: /* Tandy sound system start recording */
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@ -228,6 +298,9 @@ static void TandyDAC_Handler(Bit8u tfunction) {
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CALLBACK_SCF(false);
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break;
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case 0x85: /* Tandy sound system reset */
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if (tandy_dac.port) {
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IO_Write(tandy_dac.port,(Bit8u)(IO_Read(tandy_dac.port)&0xe0));
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}
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reg_ah=0x00;
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CALLBACK_SCF(false);
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break;
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@ -864,9 +937,17 @@ public:
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for(Bitu i = 0; i < strlen(b_date); i++) phys_writeb(0xffff5+i,b_date[i]);
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phys_writeb(0xfffff,0x55); // signature
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tandy_sb.port=0;
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tandy_dac.port=0;
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if (use_tandyDAC) {
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/* tandy DAC sound requested, see if soundblaster device is available */
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Bitu tandy_dac_type = 0;
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if (Tandy_InitializeSB()) {
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tandy_dac_type = 1;
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} else if (Tandy_InitializeTS()) {
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tandy_dac_type = 2;
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}
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if (tandy_dac_type) {
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real_writew(0x40,0xd0,0x0000);
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real_writew(0x40,0xd2,0x0000);
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real_writeb(0x40,0xd4,0xff); /* tandy DAC init value */
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@ -886,7 +967,14 @@ public:
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// pop ax
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// iret
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RealPt current_irq=RealGetVec(tandy_sb.irq+8);
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Bit8u tandy_irq = 7;
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if (tandy_dac_type==1) tandy_irq = tandy_sb.irq;
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else if (tandy_dac_type==2) tandy_irq = tandy_dac.irq;
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Bit8u tandy_irq_vector = tandy_irq;
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if (tandy_irq_vector<8) tandy_irq_vector += 8;
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else tandy_irq_vector += (0x70-8);
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RealPt current_irq=RealGetVec(tandy_irq_vector);
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real_writed(0x40,0xd6,current_irq);
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for (Bit16u i=0; i<0x10; i++) phys_writeb(PhysMake(0xf000,0xa084+i),0x80);
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} else real_writeb(0x40,0xd4,0x00);
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@ -995,7 +1083,14 @@ public:
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Bit32u orig_vector=real_readd(0x40,0xd6);
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if (orig_vector==tandy_DAC_callback[0]->Get_RealPointer()) {
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/* set IRQ vector to old value */
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RealSetVec(tandy_sb.irq+8,real_readd(0x40,0xd6));
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Bit8u tandy_irq = 7;
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if (tandy_sb.port) tandy_irq = tandy_sb.irq;
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else if (tandy_dac.port) tandy_irq = tandy_dac.irq;
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Bit8u tandy_irq_vector = tandy_irq;
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if (tandy_irq_vector<8) tandy_irq_vector += 8;
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else tandy_irq_vector += (0x70-8);
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RealSetVec(tandy_irq_vector,real_readd(0x40,0xd6));
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real_writed(0x40,0xd6,0x00000000);
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}
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delete tandy_DAC_callback[0];
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