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Add reading of timer 1 and give it the value xt bios gives it

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1835
This commit is contained in:
Sjoerd van der Berg 2004-06-17 07:27:55 +00:00
parent 38cb5b88ca
commit 3e6947cb87
1 changed files with 19 additions and 11 deletions
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30
src/hardware/timer.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: timer.cpp,v 1.23 2004-04-03 19:34:10 harekiet Exp $ */
/* $Id: timer.cpp,v 1.24 2004-06-17 07:27:55 harekiet Exp $ */
#include "dosbox.h"
#include "inout.h"
@ -128,9 +128,7 @@ static void write_latch(Bitu port,Bitu val,Bitu iolen) {
if (p->write_state != 0) {
if (p->write_latch == 0) {
if(p->bcd == false) {p->cntr = 0x10000;} else {p->cntr=9999;}
}
else p->cntr = p->write_latch;
} else p->cntr = p->write_latch;
p->start=PIC_MicroCount();
p->micro=(Bits)(1000000/((float)PIT_TICK_RATE/(float)p->cntr));
switch (counter) {
@ -193,9 +191,10 @@ static void write_p43(Bitu port,Bitu val,Bitu iolen) {
case 1:
case 2:
pit[latch].bcd = (val&1)>0;
if (val & 1) if(pit[latch].cntr>=9999) pit[latch].cntr=9999;
if (val & 1) {
if(pit[latch].cntr>=9999) pit[latch].cntr=9999;
}
if ((val & 0x30) == 0) {
/* Counter latch command */
counter_latch(latch);
@ -220,10 +219,11 @@ static void write_p43(Bitu port,Bitu val,Bitu iolen) {
void TIMER_Init(Section* sect) {
IO_RegisterWriteHandler(0x40,write_latch,IO_MB);
// IO_RegisterWriteHandler(0x41,write_latch,IO_MB);
IO_RegisterWriteHandler(0x42,write_latch,IO_MB);
IO_RegisterWriteHandler(0x43,write_p43,IO_MB);
IO_RegisterReadHandler(0x40,read_latch,IO_MB);
// IO_RegisterReadHandler(0x41,read_p41,IO_MB);
IO_RegisterReadHandler(0x41,read_latch,IO_MB);
IO_RegisterReadHandler(0x42,read_latch,IO_MB);
/* Setup Timer 0 */
pit[0].cntr=0x10000;
@ -236,18 +236,26 @@ void TIMER_Init(Section* sect) {
pit[0].go_read_latch = true;
pit[1].bcd = false;
pit[1].write_state = 1;
pit[1].read_state = 1;
pit[1].go_read_latch = true;
pit[1].mode = 3;
pit[1].cntr = 18;
pit[1].mode = 2;
pit[1].write_state = 3;
pit[0].micro=(Bits)(1000000/((float)PIT_TICK_RATE/(float)pit[0].cntr));
pit[2].micro=100;
pit[2].read_latch=0; /* MadTv1 */
pit[2].write_state = 3; /* Chuck Yeager */
pit[2].read_state = 3;
pit[2].mode=3;
pit[2].bcd=false;
pit[2].cntr=1320;
pit[2].go_read_latch=true;
pit[0].micro=(Bits)(1000000/((float)PIT_TICK_RATE/(float)pit[0].cntr));
pit[1].micro=(Bits)(1000000/((float)PIT_TICK_RATE/(float)pit[1].cntr));
pit[2].micro=(Bits)(1000000/((float)PIT_TICK_RATE/(float)pit[2].cntr));
PIC_AddEvent(PIT0_Event,pit[0].micro);
}