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add support for tandy sound when machine is not set to tandy

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2373
This commit is contained in:
Sebastian Strohhäcker 2005-11-10 18:05:12 +00:00
parent dc4aaeaed0
commit 7529d70fbe
3 changed files with 55 additions and 46 deletions
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75
src/ints/bios.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: bios.cpp,v 1.48 2005-11-06 15:26:06 c2woody Exp $ */
/* $Id: bios.cpp,v 1.49 2005-11-10 18:05:12 c2woody Exp $ */
#include "dosbox.h"
#include "mem.h"
@ -115,11 +115,12 @@ static bool Tandy_InitializeSB() {
/* check if Tandy DAC is still playing */
static bool Tandy_TransferInProgress(void) {
if (real_readw(0x40,0xd0)) return true; /* not yet done */
if (real_readb(0x40,0xd4)) return false; /* still in init-state */
if (real_readw(0x40,0xd0)) return true; /* not yet done */
if (real_readb(0x40,0xd4)==0xff) return false; /* still in init-state */
IO_Write(0x0c,0x00);
if (IO_ReadW(tandy_sb.dma*2+1)==0xffff) return false; /* no DMA transfer */
Bit16u datalen=IO_ReadB(tandy_sb.dma*2+1)|(IO_ReadB(tandy_sb.dma*2+1)<<8);
if (datalen==0xffff) return false; /* no DMA transfer */
return true;
}
@ -220,20 +221,14 @@ static Bitu IRQ_TandyDAC(void) {
}
static void TandyDAC_Handler(Bit8u tfunction) {
if (machine!=MCH_TANDY) return;
if (!tandy_sb.port) return;
switch (tfunction) {
case 0x81: /* Tandy sound system check */
if (tandy_sb.port) {
reg_ax=0xc4;
CALLBACK_SCF(Tandy_TransferInProgress());
}
reg_ax=0xc4;
CALLBACK_SCF(Tandy_TransferInProgress());
break;
case 0x82: /* Tandy sound system start recording */
case 0x83: /* Tandy sound system start playback */
if (!tandy_sb.port) {
CALLBACK_SCF(true);
break;
}
if (Tandy_TransferInProgress()) {
/* cannot play yet as the last transfer isn't finished yet */
reg_ah=0x00;
@ -249,16 +244,12 @@ static void TandyDAC_Handler(Bit8u tfunction) {
CALLBACK_SCF(false);
break;
case 0x84: /* Tandy sound system stop playing */
if (!tandy_sb.port) {
CALLBACK_SCF(true);
break;
}
reg_ah=0x00;
/* setup for a small buffer with zeros (silence) */
/* setup for a small buffer with silence */
real_writew(0x40,0xd0,0x0a);
real_writew(0x40,0xd2,0x1c);
Tandy_SetupTransfer(PhysMake(0xf000,0xa084),false);
Tandy_SetupTransfer(PhysMake(0xf000,0xa084),true);
CALLBACK_SCF(false);
break;
case 0x85: /* Tandy sound system reset */
@ -802,6 +793,8 @@ private:
CALLBACK_HandlerObject callback[9];
public:
BIOS(Section* configuration):Module_base(configuration){
/* tandy DAC can be requested in tandy_sound.cpp by initializing this field */
bool use_tandyDAC=(real_readb(0x40,0xd4)==0xff);
/* Clear the Bios Data Area (0x400-0x5ff, 0x600- is accounted to DOS) */
for (Bit16u i=0;i<0x200;i++) real_writeb(0x40,i,0);
/* Setup all the interrupt handlers the bios controls */
@ -863,22 +856,23 @@ public:
callback[8].Install(&INT70_Handler,CB_IRET,"Int 70 RTC");
callback[8].Set_RealVec(0x70);
if (machine==MCH_TANDY) {
phys_writeb(0xffffe,0xfc); /* Tandy model */
phys_writeb(0xfc000,0x21); /* Tandy bios identificator */
if (machine==MCH_TANDY) phys_writeb(0xffffe,0xff); /* Tandy model */
else phys_writeb(0xffffe,0xfc); /* PC */
if (use_tandyDAC) {
/* tandy DAC sound requested, see if soundblaster device is available */
if (Tandy_InitializeSB()) {
real_writew(0x40,0xd0,0x0000);
real_writew(0x40,0xd2,0x0000);
real_writeb(0x40,0xd4,0xff); /* initial value */
real_writeb(0x40,0xd4,0xff); /* tandy DAC init value */
real_writed(0x40,0xd6,0x00000000);
/* install the DAC callback handler */
tandy_DAC_callback=new CALLBACK_HandlerObject();
tandy_DAC_callback->Install(&IRQ_TandyDAC,CB_IRET,"Tandy DAC IRQ");
RealPt current_irq=RealGetVec(tandy_sb.irq+8);
real_writed(0x40,0xd6,current_irq);
}
} else {
phys_writeb(0xffffe,0xfc); /* PC */
for (Bitu i=0; i<0x10; i++) phys_writeb(PhysMake(0xf000,0xa084+i),0x80);
} else real_writeb(0x40,0xd4,0x00);
}
/* Setup some stuff in 0x40 bios segment */
@ -968,22 +962,21 @@ public:
size_extended|=(IO_Read(0x71) << 8);
}
~BIOS(){
if (machine==MCH_TANDY) {
/* abort DAC playing */
if (tandy_sb.port) {
IO_Write(tandy_sb.port+0xc,0xd3);
IO_Write(tandy_sb.port+0xc,0xd0);
}
if (tandy_DAC_callback) {
Bit32u orig_vector=real_readd(0x40,0xd6);
if (orig_vector==tandy_DAC_callback->Get_RealPointer()) {
/* set IRQ vector to old value */
RealSetVec(tandy_sb.irq+8,real_readd(0x40,0xd6));
real_writed(0x40,0xd6,0x00000000);
}
delete tandy_DAC_callback;
tandy_DAC_callback=NULL;
/* abort DAC playing */
if (tandy_sb.port) {
IO_Write(tandy_sb.port+0xc,0xd3);
IO_Write(tandy_sb.port+0xc,0xd0);
}
real_writeb(0x40,0xd4,0x00);
if (tandy_DAC_callback) {
Bit32u orig_vector=real_readd(0x40,0xd6);
if (orig_vector==tandy_DAC_callback->Get_RealPointer()) {
/* set IRQ vector to old value */
RealSetVec(tandy_sb.irq+8,real_readd(0x40,0xd6));
real_writed(0x40,0xd6,0x00000000);
}
delete tandy_DAC_callback;
tandy_DAC_callback=NULL;
}
}
};