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initialize GUS register (thanks to peter ferrie for checking this out)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3460
This commit is contained in:
Sebastian Strohhäcker 2009-09-03 16:03:01 +00:00
parent f344153356
commit 36868f0b7d
1 changed files with 10 additions and 8 deletions
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18
src/hardware/gus.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: gus.cpp,v 1.36 2009-04-27 17:11:26 qbix79 Exp $ */
/* $Id: gus.cpp,v 1.37 2009-09-03 16:03:01 c2woody Exp $ */
#include <string.h>
#include <iomanip>
@ -338,7 +338,9 @@ static void GUSReset(void) {
myGUS.timers[1].value = 0xff;
myGUS.timers[0].delay = 0.080f;
myGUS.timers[1].delay = 0.320f;
myGUS.ChangeIRQDMA = false;
myGUS.mixControl = 0x0b; // latches enabled by default LINEs disabled
// Stop all channels
int i;
for(i=0;i<32;i++) {
@ -633,11 +635,11 @@ static void write_gus(Bitu port,Bitu val,Bitu iolen) {
// LOG_MSG("Write gus port %x val %x",port,val);
switch(port - GUS_BASE) {
case 0x200:
myGUS.mixControl = val;
myGUS.mixControl = (Bit8u)val;
myGUS.ChangeIRQDMA = true;
return;
case 0x208:
adlib_commandreg = val;
adlib_commandreg = (Bit8u)val;
break;
case 0x209:
//TODO adlib_commandreg should be 4 for this to work else it should just latch the value
@ -684,21 +686,21 @@ static void write_gus(Bitu port,Bitu val,Bitu iolen) {
curchan = guschan[myGUS.gCurChannel];
break;
case 0x303:
myGUS.gRegSelect = val;
myGUS.gRegSelect = (Bit8u)val;
myGUS.gRegData = 0;
break;
case 0x304:
if (iolen==2) {
myGUS.gRegData=val;
myGUS.gRegData=(Bit16u)val;
ExecuteGlobRegister();
} else myGUS.gRegData = val;
} else myGUS.gRegData = (Bit16u)val;
break;
case 0x305:
myGUS.gRegData = (0x00ff & myGUS.gRegData) | val << 8;
myGUS.gRegData = (Bit16u)((0x00ff & myGUS.gRegData) | val << 8);
ExecuteGlobRegister();
break;
case 0x307:
if(myGUS.gDramAddr < sizeof(GUSRam)) GUSRam[myGUS.gDramAddr] = val;
if(myGUS.gDramAddr < sizeof(GUSRam)) GUSRam[myGUS.gDramAddr] = (Bit8u)val;
break;
default:
#if LOG_GUS