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add PCJr-compatible keyboard layer;

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add support for PCJr cartridges


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2402
This commit is contained in:
Sebastian Strohhäcker 2005-12-04 21:17:29 +00:00
parent 6ede5e436f
commit 90d6d74f99
5 changed files with 91 additions and 46 deletions
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17
src/hardware/pic.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: pic.cpp,v 1.31 2005-04-21 21:06:27 qbix79 Exp $ */
/* $Id: pic.cpp,v 1.32 2005-12-04 21:17:29 c2woody Exp $ */
#include <list>
@ -47,6 +47,7 @@ struct PIC_Controller {
bool special;
bool auto_eoi;
bool rotate_on_auto_eoi;
bool single;
bool request_issr;
Bit8u vector_base;
};
@ -79,11 +80,11 @@ static void write_command(Bitu port,Bitu val,Bitu iolen) {
static Bit16u IRQ_priority_table[16] =
{ 0,1,2,8,9,10,11,12,13,14,15,3,4,5,6,7 };
if (GCC_UNLIKELY(val&0x10)) { // ICW1 issued
if (val&0x02) E_Exit("PIC: single mode not handled"); // (would have to skip ICW3)
if (val&0x04) E_Exit("PIC: 4 byte interval not handled");
if (val&0x08) E_Exit("PIC: level triggered mode not handled");
if (val&0xe0) E_Exit("PIC: 8080/8085 mode not handled");
pic->icw_index=1; // next is ICW3
pic->single=val&0x02;
pic->icw_index=1; // next is ICW2
pic->icw_words=2 + (val&0x01); // =3 if ICW4 needed
} else if (GCC_UNLIKELY(val&0x08)) { // OCW3 issued
if (val&0x04) E_Exit("PIC: poll command not handled");
@ -160,6 +161,10 @@ static void write_data(Bitu port,Bitu val,Bitu iolen) {
else PIC_IRQCheck&=~(1 << (i+irq_base));
}
}
if (machine==MCH_PCJR) {
/* irq6 cannot be disabled as it serves as pseudo-NMI */
irqs[6].masked=false;
}
if(irqs[2].masked != old_irq2_mask) {
/* Irq 2 mask has changed recheck second pic */
for(i=8;i<=15;i++) {
@ -178,6 +183,7 @@ static void write_data(Bitu port,Bitu val,Bitu iolen) {
irqs[i+irq_base].vector=(val&0xf8)+i;
};
if(pic->icw_index++ >= pic->icw_words) pic->icw_index=0;
else if(pic->single) pic->icw_index=3; /* skip ICW3 in single mode */
break;
case 2: /* icw 3 */
LOG(LOG_PIC,LOG_NORMAL)("%d:ICW 3 %X",port==0x21 ? 0 : 1,val);
@ -525,6 +531,7 @@ public:
pics[i].rotate_on_auto_eoi=false;
pics[i].request_issr=false;
pics[i].special=false;
pics[i].single=false;
pics[i].icw_index=0;
pics[i].icw_words=0;
}
@ -542,6 +549,10 @@ public:
irqs[1].masked=false; /* Enable Keyboard IRQ */
irqs[2].masked=false; /* Enable second pic */
irqs[8].masked=false; /* Enable RTC IRQ */
if (machine==MCH_PCJR) {
/* Enable IRQ6 (replacement for the NMI for PCJr) */
irqs[6].masked=false;
}
ReadHandler[0].Install(0x20,read_command,IO_MB);
ReadHandler[1].Install(0x21,read_data,IO_MB);
WriteHandler[0].Install(0x20,write_command,IO_MB);