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ISYS8020: Fix format of file

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This commit is contained in:
Bill Beech 2015-05-08 15:27:29 -07:00
parent 44e5c228c7
commit 06f9cbe41d
1 changed files with 65 additions and 55 deletions
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86
Intel-Systems/common/i8259.c
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@ -23,8 +23,14 @@
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from William A. Beech.
These functions support a simulated i8259 interface device on an iSBC.
24 Jan 13 - Original file.
NOTES:
This software was written by Bill Beech, 24 Jan 13, to allow emulation of
more complex Multibus Computer Systems.
This program simulates up to 2 i8259 devices. It handles 1 i8259
device on the iSBC 80/20 and iSBC 80/30 SBCs. Other devices could be on
other multibus boards in the simulated system.
*/
#include "system_defs.h" /* system header in system dir */
@ -59,8 +65,8 @@ int32 icw_num0 = 1, icw_num1 = 1;
/* i8255 Standard I/O Data Structures */
UNIT i8259_unit[] = {
{ UDATA (0, 0, 0) },
{ UDATA (0, 0, 0) }
{ UDATA (0, 0, 0) }, /* i8259 0 */
{ UDATA (0, 0, 0) } /* i8259 1 */
};
DEBTAB i8259_debug[] = {
@ -75,10 +81,10 @@ DEBTAB i8259_debug[] = {
};
REG i8259_reg[] = {
{ HRDATA (IRR0, i8259_unit[0].u3, 8) },
{ HRDATA (IRR0, i8259_unit[0].u3, 8) }, /* i8259 0 */
{ HRDATA (ISR0, i8259_unit[0].u4, 8) },
{ HRDATA (IMR0, i8259_unit[0].u5, 8) },
{ HRDATA (IRR1, i8259_unit[1].u3, 8) },
{ HRDATA (IRR1, i8259_unit[1].u3, 8) }, /* i8259 0 */
{ HRDATA (ISR1, i8259_unit[1].u4, 8) },
{ HRDATA (IMR1, i8259_unit[1].u5, 8) },
{ NULL }
@ -114,6 +120,8 @@ DEVICE i8259_dev = {
IN or OUT instruction is issued.
*/
/* i8259 0 functions */
int32 i8259a0(int32 io, int32 data)
{
int32 bit;
@ -151,38 +159,6 @@ int32 i8259a0(int32 io, int32 data)
return 0;
}
int32 i8259b0(int32 io, int32 data)
{
if (io == 0) { /* read data port */
return (i8259_unit[0].u5); /* IMR */
} else { /* write data port */
if (icw_num0 >= 2 && icw_num0 < 5) { /* ICW mode */
switch (icw_num0) {
case 2: /* ICW2 */
i8259_icw2[0] = data;
break;
case 3: /* ICW3 */
i8259_icw3[0] = data;
break;
case 4: /* ICW4 */
if (i8259_icw1[0] & 0x01)
i8259_icw4[0] = data;
else
sim_printf("8259b-0: ICW4 not enabled - data=%02X\n", data);
break;
default:
sim_printf("8259b-0: ICW Error %02X\n", data);
break;
}
icw_num0++;
} else {
i8259_ocw1[0] = data; /* OCW0 */
}
}
i8259_dump(0);
return 0;
}
int32 i8259a1(int32 io, int32 data)
{
int32 bit;
@ -220,6 +196,40 @@ int32 i8259a1(int32 io, int32 data)
return 0;
}
/* i8259 1 functions */
int32 i8259b0(int32 io, int32 data)
{
if (io == 0) { /* read data port */
return (i8259_unit[0].u5); /* IMR */
} else { /* write data port */
if (icw_num0 >= 2 && icw_num0 < 5) { /* ICW mode */
switch (icw_num0) {
case 2: /* ICW2 */
i8259_icw2[0] = data;
break;
case 3: /* ICW3 */
i8259_icw3[0] = data;
break;
case 4: /* ICW4 */
if (i8259_icw1[0] & 0x01)
i8259_icw4[0] = data;
else
sim_printf("8259b-0: ICW4 not enabled - data=%02X\n", data);
break;
default:
sim_printf("8259b-0: ICW Error %02X\n", data);
break;
}
icw_num0++;
} else {
i8259_ocw1[0] = data; /* OCW0 */
}
}
i8259_dump(0);
return 0;
}
int32 i8259b1(int32 io, int32 data)
{
if (io == 0) { /* read data port */