ISYS8020: Fix format of file
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Bill Beech
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44e5c228c7
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06f9cbe41d
1 changed files with 65 additions and 55 deletions
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@ -2,29 +2,35 @@
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Copyright (c) 2010, William A. Beech
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Copyright (c) 2010, William A. Beech
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Permission is hereby granted, free of charge, to any person obtaining a
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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WILLIAM A. BEECH BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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WILLIAM A. BEECH BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of William A. Beech shall not be
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Except as contained in this notice, the name of William A. Beech shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from William A. Beech.
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in this Software without prior written authorization from William A. Beech.
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These functions support a simulated i8259 interface device on an iSBC.
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NOTES:
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24 Jan 13 - Original file.
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This software was written by Bill Beech, 24 Jan 13, to allow emulation of
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more complex Multibus Computer Systems.
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This program simulates up to 2 i8259 devices. It handles 1 i8259
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device on the iSBC 80/20 and iSBC 80/30 SBCs. Other devices could be on
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other multibus boards in the simulated system.
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*/
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*/
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#include "system_defs.h" /* system header in system dir */
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#include "system_defs.h" /* system header in system dir */
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@ -59,8 +65,8 @@ int32 icw_num0 = 1, icw_num1 = 1;
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/* i8255 Standard I/O Data Structures */
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/* i8255 Standard I/O Data Structures */
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UNIT i8259_unit[] = {
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UNIT i8259_unit[] = {
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{ UDATA (0, 0, 0) },
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{ UDATA (0, 0, 0) }, /* i8259 0 */
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{ UDATA (0, 0, 0) }
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{ UDATA (0, 0, 0) } /* i8259 1 */
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};
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};
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DEBTAB i8259_debug[] = {
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DEBTAB i8259_debug[] = {
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@ -75,10 +81,10 @@ DEBTAB i8259_debug[] = {
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};
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};
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REG i8259_reg[] = {
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REG i8259_reg[] = {
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{ HRDATA (IRR0, i8259_unit[0].u3, 8) },
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{ HRDATA (IRR0, i8259_unit[0].u3, 8) }, /* i8259 0 */
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{ HRDATA (ISR0, i8259_unit[0].u4, 8) },
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{ HRDATA (ISR0, i8259_unit[0].u4, 8) },
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{ HRDATA (IMR0, i8259_unit[0].u5, 8) },
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{ HRDATA (IMR0, i8259_unit[0].u5, 8) },
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{ HRDATA (IRR1, i8259_unit[1].u3, 8) },
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{ HRDATA (IRR1, i8259_unit[1].u3, 8) }, /* i8259 0 */
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{ HRDATA (ISR1, i8259_unit[1].u4, 8) },
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{ HRDATA (ISR1, i8259_unit[1].u4, 8) },
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{ HRDATA (IMR1, i8259_unit[1].u5, 8) },
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{ HRDATA (IMR1, i8259_unit[1].u5, 8) },
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{ NULL }
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{ NULL }
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@ -114,6 +120,8 @@ DEVICE i8259_dev = {
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IN or OUT instruction is issued.
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IN or OUT instruction is issued.
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*/
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*/
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/* i8259 0 functions */
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int32 i8259a0(int32 io, int32 data)
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int32 i8259a0(int32 io, int32 data)
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{
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{
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int32 bit;
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int32 bit;
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@ -151,38 +159,6 @@ int32 i8259a0(int32 io, int32 data)
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return 0;
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return 0;
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}
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}
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int32 i8259b0(int32 io, int32 data)
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{
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if (io == 0) { /* read data port */
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return (i8259_unit[0].u5); /* IMR */
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} else { /* write data port */
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if (icw_num0 >= 2 && icw_num0 < 5) { /* ICW mode */
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switch (icw_num0) {
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case 2: /* ICW2 */
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i8259_icw2[0] = data;
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break;
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case 3: /* ICW3 */
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i8259_icw3[0] = data;
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break;
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case 4: /* ICW4 */
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if (i8259_icw1[0] & 0x01)
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i8259_icw4[0] = data;
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else
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sim_printf("8259b-0: ICW4 not enabled - data=%02X\n", data);
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break;
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default:
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sim_printf("8259b-0: ICW Error %02X\n", data);
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break;
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}
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icw_num0++;
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} else {
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i8259_ocw1[0] = data; /* OCW0 */
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}
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}
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i8259_dump(0);
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return 0;
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}
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int32 i8259a1(int32 io, int32 data)
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int32 i8259a1(int32 io, int32 data)
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{
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{
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int32 bit;
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int32 bit;
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@ -220,6 +196,40 @@ int32 i8259a1(int32 io, int32 data)
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return 0;
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return 0;
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}
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}
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/* i8259 1 functions */
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int32 i8259b0(int32 io, int32 data)
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{
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if (io == 0) { /* read data port */
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return (i8259_unit[0].u5); /* IMR */
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} else { /* write data port */
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if (icw_num0 >= 2 && icw_num0 < 5) { /* ICW mode */
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switch (icw_num0) {
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case 2: /* ICW2 */
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i8259_icw2[0] = data;
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break;
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case 3: /* ICW3 */
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i8259_icw3[0] = data;
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break;
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case 4: /* ICW4 */
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if (i8259_icw1[0] & 0x01)
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i8259_icw4[0] = data;
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else
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sim_printf("8259b-0: ICW4 not enabled - data=%02X\n", data);
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break;
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default:
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sim_printf("8259b-0: ICW Error %02X\n", data);
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break;
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}
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icw_num0++;
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} else {
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i8259_ocw1[0] = data; /* OCW0 */
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}
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}
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i8259_dump(0);
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return 0;
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}
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int32 i8259b1(int32 io, int32 data)
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int32 i8259b1(int32 io, int32 data)
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{
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{
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if (io == 0) { /* read data port */
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if (io == 0) { /* read data port */
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