mirror of
https://github.com/open-simh/simh.git
synced 2026-05-05 15:43:58 +00:00
Merge of Bob's simh-v3.9-0-rc3
This commit is contained in:
Mark Pizzolato
211
swtp6800/common/mp-a.c
Normal file
211
swtp6800/common/mp-a.c
Normal file
@@ -0,0 +1,211 @@
|
||||
/* mp-a.c: SWTP MP-A M6800 CPU simulator
|
||||
|
||||
Copyright (c) 2011, William 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.
|
||||
|
||||
The MP-A CPU Board contains the following devices [mp-a.c]:
|
||||
M6800 processor [m6800.c].
|
||||
M6810 128 byte RAM at 0xA000 [m6810.c].
|
||||
M6830, SWTBUG, or custom boot ROM at 0xE000 [bootrom.c].
|
||||
Interface to the SS-50 bus and the MP-B2 Mother Board for I/O
|
||||
and memory boards [mp-b2.c].
|
||||
Note: The file names of the emulator source programs for each device are
|
||||
contained in "[]".
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include "swtp_defs.h"
|
||||
|
||||
#define UNIT_V_SWT (UNIT_V_UF) /* on SWTBUG, off MIKBUG */
|
||||
#define UNIT_SWT (1 << UNIT_V_SWT)
|
||||
#define UNIT_V_RAM (UNIT_V_UF+1) /* off disables 6810 RAM */
|
||||
#define UNIT_RAM (1 << UNIT_V_RAM)
|
||||
|
||||
/* local global variables */
|
||||
|
||||
/* function prototypes */
|
||||
|
||||
int32 CPU_BD_get_mbyte(int32 addr);
|
||||
int32 CPU_BD_get_mword(int32 addr);
|
||||
void CPU_BD_put_mbyte(int32 addr, int32 val);
|
||||
void CPU_BD_put_mword(int32 addr, int32 val);
|
||||
|
||||
/* external routines */
|
||||
|
||||
/* MP-B2 bus routines */
|
||||
extern int32 MB_get_mbyte(int32 addr);
|
||||
extern int32 MB_get_mword(int32 addr);
|
||||
extern void MB_put_mbyte(int32 addr, int32 val);
|
||||
extern void MB_put_mword(int32 addr, int32 val);
|
||||
|
||||
/* M6810 bus routines */
|
||||
extern int32 m6810_get_mbyte(int32 addr);
|
||||
extern void m6810_put_mbyte(int32 addr, int32 val);
|
||||
|
||||
/* BOOTROM bus routines */
|
||||
extern UNIT BOOTROM_unit;
|
||||
extern int32 BOOTROM_get_mbyte(int32 offset);
|
||||
|
||||
/* MP-A data structures
|
||||
|
||||
CPU_BD_dev MP-A2 device descriptor
|
||||
CPU_BD_unit MP-A2 unit descriptor
|
||||
CPU_BD_reg MP-A2 register list
|
||||
CPU_BD_mod MP-A2 modifiers list */
|
||||
|
||||
UNIT CPU_BD_unit = { UDATA (NULL, 0, 0) };
|
||||
|
||||
REG CPU_BD_reg[] = {
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
MTAB CPU_BD_mod[] = {
|
||||
{ UNIT_SWT, UNIT_SWT, "SWT", "SWT", NULL },
|
||||
{ UNIT_SWT, 0, "NOSWT", "NOSWT", NULL },
|
||||
{ UNIT_RAM, UNIT_RAM, "RAM", "RAM", NULL },
|
||||
{ UNIT_RAM, 0, "NORAM", "NORAM", NULL },
|
||||
{ 0 }
|
||||
};
|
||||
|
||||
DEBTAB CPU_BD_debug[] = {
|
||||
{ "ALL", DEBUG_all },
|
||||
{ "FLOW", DEBUG_flow },
|
||||
{ "READ", DEBUG_read },
|
||||
{ "WRITE", DEBUG_write },
|
||||
{ "LEV1", DEBUG_level1 },
|
||||
{ "LEV2", DEBUG_level2 },
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
DEVICE CPU_BD_dev = {
|
||||
"MP-A", //name
|
||||
&CPU_BD_unit, //units
|
||||
CPU_BD_reg, //registers
|
||||
CPU_BD_mod, //modifiers
|
||||
1, //numunits
|
||||
16, //aradix
|
||||
16, //awidth
|
||||
1, //aincr
|
||||
16, //dradix
|
||||
8, //dwidth
|
||||
NULL, //examine
|
||||
NULL, //deposit
|
||||
NULL, //reset
|
||||
NULL, //boot
|
||||
NULL, //attach
|
||||
NULL, //detach
|
||||
NULL, //ctxt
|
||||
DEV_DEBUG, //flags
|
||||
0, //dctrl
|
||||
CPU_BD_debug, /* debflags */
|
||||
NULL, //msize
|
||||
NULL //lname
|
||||
};
|
||||
|
||||
/* get a byte from memory */
|
||||
|
||||
int32 CPU_BD_get_mbyte(int32 addr)
|
||||
{
|
||||
int32 val;
|
||||
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mbyte: addr=%04X\n", addr);
|
||||
switch(addr & 0xF000) {
|
||||
case 0xA000:
|
||||
if (CPU_BD_unit.flags & UNIT_RAM) {
|
||||
val = m6810_get_mbyte(addr - 0xA000) & 0xFF;
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mbyte: m6810 val=%02X\n", val);
|
||||
return val;
|
||||
} else {
|
||||
val = MB_get_mbyte(addr) & 0xFF;
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mbyte: m6810 val=%02X\n", val);
|
||||
return val;
|
||||
}
|
||||
case 0xE000:
|
||||
val = BOOTROM_get_mbyte(addr - 0xE000) & 0xFF;
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mbyte: EPROM=%02X\n", val);
|
||||
return val;
|
||||
case 0xF000:
|
||||
val = BOOTROM_get_mbyte(addr - (0x10000 - BOOTROM_unit.capac)) & 0xFF;
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mbyte: EPROM=%02X\n", val);
|
||||
return val;
|
||||
default:
|
||||
val = MB_get_mbyte(addr) & 0xFF;
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mbyte: mp_b2 val=%02X\n", val);
|
||||
return val;
|
||||
}
|
||||
}
|
||||
|
||||
/* get a word from memory */
|
||||
|
||||
int32 CPU_BD_get_mword(int32 addr)
|
||||
{
|
||||
int32 val;
|
||||
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mword: addr=%04X\n", addr);
|
||||
val = (CPU_BD_get_mbyte(addr) << 8);
|
||||
val |= CPU_BD_get_mbyte(addr+1);
|
||||
val &= 0xFFFF;
|
||||
if (CPU_BD_dev.dctrl & DEBUG_read)
|
||||
printf("CPU_BD_get_mword: val=%04X\n", val);
|
||||
return val;
|
||||
}
|
||||
|
||||
/* put a byte to memory */
|
||||
|
||||
void CPU_BD_put_mbyte(int32 addr, int32 val)
|
||||
{
|
||||
if (CPU_BD_dev.dctrl & DEBUG_write)
|
||||
printf("CPU_BD_put_mbyte: addr=%04X, val=%02X\n", addr, val);
|
||||
switch(addr & 0xF000) {
|
||||
case 0xA000:
|
||||
if (CPU_BD_unit.flags & UNIT_RAM) {
|
||||
m6810_put_mbyte(addr - 0xA000, val);
|
||||
return;
|
||||
} else {
|
||||
MB_put_mbyte(addr, val);
|
||||
return;
|
||||
}
|
||||
default:
|
||||
MB_put_mbyte(addr, val);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/* put a word to memory */
|
||||
|
||||
void CPU_BD_put_mword(int32 addr, int32 val)
|
||||
{
|
||||
if (CPU_BD_dev.dctrl & DEBUG_write)
|
||||
printf("CPU_BD_put_mword: addr=%04X, val=%04X\n", addr, val);
|
||||
CPU_BD_put_mbyte(addr, val >> 8);
|
||||
CPU_BD_put_mbyte(addr+1, val);
|
||||
}
|
||||
|
||||
/* end of mp-a.c */
|
||||
Reference in New Issue
Block a user