blob: 11b7b6af4927d9459655ebd1886c04299bb371dd [file] [log] [blame] [raw]
/* ibmpcxt_sys.c: IBM 5160 simulator
Copyright (c) 2016, William A. Beech
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
William A. Beech BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of William A. Beech shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from William A. Beech.
11 Jul 16 - Original file.
*/
#include "system_defs.h"
extern DEVICE i8088_dev;
extern REG i8088_reg[];
extern DEVICE i8237_dev;
extern DEVICE i8253_dev;
extern DEVICE i8255_dev;
extern DEVICE i8259_dev;
extern DEVICE EPROM_dev;
extern DEVICE RAM_dev;
extern DEVICE xtbus_dev;
/* bit patterns to manipulate 8-bit ports */
#define i82XX_bit_0 0x01 //bit 0 of a port
#define i82XX_bit_1 0x02 //bit 1 of a port
#define i82XX_bit_2 0x04 //bit 2 of a port
#define i82XX_bit_3 0x08 //bit 3 of a port
#define i82XX_bit_4 0x10 //bit 4 of a port
#define i82XX_bit_5 0x20 //bit 5 of a port
#define i82XX_bit_6 0x40 //bit 6 of a port
#define i82XX_bit_7 0x80 //bit 7 of a port
#define i82XX_nbit_0 ~i8255_bit_0 //bit 0 of a port
#define i82XX_nbit_1 ~i8255_bit_1 //bit 1 of a port
#define i82XX_nbit_2 ~i8255_bit_3 //bit 2 of a port
#define i82XX_nbit_3 ~i8255_bit_3 //bit 3 of a port
#define i82XX_nbit_4 ~i8255_bit_4 //bit 4 of a port
#define i82XX_nbit_5 ~i8255_bit_5 //bit 5 of a port
#define i82XX_nbit_6 ~i8255_bit_6 //bit 6 of a port
#define i82XX_nbit_7 ~i8255_bit_7 //bit 7 of a port
/* SCP data structures
sim_name simulator name string
sim_PC pointer to saved PC register descriptor
sim_emax number of words needed for examine
sim_devices array of pointers to simulated devices
sim_stop_messages array of pointers to stop messages
*/
char sim_name[] = "IBM PC XT";
REG *sim_PC = &i8088_reg[0];
int32 sim_emax = 4;
DEVICE *sim_devices[] = {
&i8088_dev,
&EPROM_dev,
&RAM_dev,
&i8237_dev,
&i8253_dev,
&i8255_dev,
&i8259_dev,
&xtbus_dev,
NULL
};
const char *sim_stop_messages[] = {
"Unknown error",
"Unknown I/O Instruction",
"HALT instruction",
"Breakpoint",
"Invalid Opcode",
"Invalid Memory",
};