276 lines
8.7 KiB
C
276 lines
8.7 KiB
C
/* isbc464.c: Intel iSBC 464 32K Byte ROM Card
|
|
|
|
Copyright (c) 2011, 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.
|
|
|
|
MODIFICATIONS:
|
|
|
|
29 Oct 17 - Original file.
|
|
|
|
NOTES:
|
|
|
|
TO DO:
|
|
Set up for actual ROM sizes 2708-...
|
|
|
|
*/
|
|
|
|
#include "system_defs.h"
|
|
|
|
#define BASE_ADDR u3
|
|
|
|
#define isbc464_NAME "Intel iSBC 464 ROM Board"
|
|
|
|
/* prototypes */
|
|
|
|
t_stat isbc464_cfg(uint16 base, uint16 size, uint8 dummy);
|
|
t_stat isbc464_clr(void);
|
|
t_stat isbc464_set_base(UNIT *uptr, int32 val, CONST char *cptr, void *desc);
|
|
t_stat isbc464_set_size(UNIT *uptr, int32 val, CONST char *cptr, void *desc);
|
|
t_stat isbc464_show_param (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
|
|
t_stat isbc464_reset (DEVICE *dptr);
|
|
t_stat isbc464_attach (UNIT *uptr, CONST char *cptr);
|
|
uint8 isbc464_get_mbyte(uint16 addr);
|
|
|
|
/* external function prototypes */
|
|
|
|
/* external globals */
|
|
|
|
extern uint8 xack; /* XACK signal */
|
|
|
|
/* local globals */
|
|
|
|
int isbc464_onetime = 1;
|
|
static const char* isbc464_desc(DEVICE *dptr) {
|
|
return isbc464_NAME;
|
|
}
|
|
|
|
/* isbc464 Standard I/O Data Structures */
|
|
|
|
UNIT isbc464_unit = {
|
|
UDATA (NULL, UNIT_ATTABLE+UNIT_BINK+UNIT_ROABLE+UNIT_RO+UNIT_BUFABLE+UNIT_MUSTBUF, 0)
|
|
};
|
|
|
|
MTAB isbc464_mod[] = {
|
|
{ MTAB_XTD | MTAB_VDV, 0, NULL, "SIZE", &isbc464_set_size,
|
|
NULL, NULL, "Sets the ROM size for iSBC464" },
|
|
{ MTAB_XTD | MTAB_VDV, 0, NULL, "BASE", &isbc464_set_base,
|
|
NULL, NULL, "Sets the ROM base for iSBC464" },
|
|
{ MTAB_XTD|MTAB_VDV, 0, "PARAM", NULL, NULL, &isbc464_show_param, NULL,
|
|
"show configured parameters for SBC 464" },
|
|
{ 0 }
|
|
};
|
|
|
|
DEBTAB isbc464_debug[] = {
|
|
{ "ALL", DEBUG_all },
|
|
{ "FLOW", DEBUG_flow },
|
|
{ "READ", DEBUG_read },
|
|
{ "WRITE", DEBUG_write },
|
|
{ "XACK", DEBUG_xack },
|
|
{ NULL }
|
|
};
|
|
|
|
DEVICE isbc464_dev = {
|
|
"SBC464", //name
|
|
&isbc464_unit, //units
|
|
NULL, //registers
|
|
isbc464_mod, //modifiers
|
|
1, //numunits
|
|
16, //aradix
|
|
16, //awidth
|
|
1, //aincr
|
|
16, //dradix
|
|
8, //dwidth
|
|
NULL, //examine
|
|
NULL, //deposite
|
|
&isbc464_reset, //reset
|
|
NULL, //boot
|
|
isbc464_attach, //attach
|
|
NULL, //detach
|
|
NULL, //ctxt
|
|
DEV_DEBUG+DEV_DISABLE+DEV_DIS, //flags
|
|
0, //dctrl
|
|
isbc464_debug, //debflags
|
|
NULL, //msize
|
|
NULL, //lname
|
|
NULL, //help routine
|
|
NULL, //attach help routine
|
|
NULL, //help context
|
|
&isbc464_desc //device description
|
|
};
|
|
|
|
/* isbc464 globals */
|
|
|
|
// isbc464 configuration
|
|
|
|
t_stat isbc464_cfg(uint16 base, uint16 size, uint8 dummy)
|
|
{
|
|
isbc464_unit.capac = size;
|
|
isbc464_unit.u3 = base;
|
|
isbc464_unit.filebuf = (uint8 *)calloc(size, sizeof(uint8));
|
|
if (isbc464_unit.filebuf == NULL) {
|
|
sim_printf (" isbc464: Calloc error\n");
|
|
return SCPE_MEM;
|
|
}
|
|
sim_printf(" isbc464: 0%04XH bytes at base address 0%04XH\n",
|
|
isbc464_unit.capac, isbc464_unit.u3);
|
|
return SCPE_OK;
|
|
}
|
|
|
|
t_stat isbc464_clr(void)
|
|
{
|
|
isbc464_unit.capac = 0;
|
|
isbc464_unit.u3 = 0;
|
|
free(isbc464_unit.filebuf);
|
|
return SCPE_OK;
|
|
}
|
|
|
|
// set size parameter
|
|
|
|
t_stat isbc464_set_size(UNIT *uptr, int32 val, CONST char *cptr, void *desc)
|
|
{
|
|
uint32 size, result, i;
|
|
|
|
if (cptr == NULL)
|
|
return SCPE_ARG;
|
|
result = sscanf(cptr, "%i%n", &size, &i);
|
|
if ((result == 1) && (cptr[i] == 'K') && ((cptr[i + 1] == 0) ||
|
|
((cptr[i + 1] == 'B') && (cptr[i + 2] == 0)))) {
|
|
switch (size) {
|
|
case 0x10: //16K
|
|
uptr->capac = 16384;
|
|
break;
|
|
case 0x20: //32K
|
|
uptr->capac = 32768;
|
|
break;
|
|
case 0x30: //48K
|
|
uptr->capac = 49152;
|
|
break;
|
|
case 0x40: //64K
|
|
uptr->capac = 65536;
|
|
break;
|
|
default:
|
|
sim_printf("SBC464: Size error\n");
|
|
return SCPE_ARG;
|
|
}
|
|
sim_printf("SBC464: Size=%04X\n", uptr->capac);
|
|
return SCPE_OK;
|
|
}
|
|
return SCPE_ARG;
|
|
}
|
|
|
|
// set base address parameter
|
|
|
|
t_stat isbc464_set_base(UNIT *uptr, int32 val, CONST char *cptr, void *desc)
|
|
{
|
|
uint32 size, result, i;
|
|
|
|
if (cptr == NULL)
|
|
return SCPE_ARG;
|
|
result = sscanf(cptr, "%i%n", &size, &i);
|
|
if ((result == 1) && (cptr[i] == 'K') && ((cptr[i + 1] == 0) ||
|
|
((cptr[i + 1] == 'B') && (cptr[i + 2] == 0)))) {
|
|
switch (size) {
|
|
case 0x00: //0K
|
|
uptr->BASE_ADDR = 0;
|
|
break;
|
|
case 0x10: //16K
|
|
uptr->BASE_ADDR = 16384;
|
|
break;
|
|
case 0x20: //32K
|
|
uptr->BASE_ADDR = 32768;
|
|
break;
|
|
case 0x30: //48K
|
|
uptr->BASE_ADDR = 49152;
|
|
break;
|
|
default:
|
|
sim_printf("SBC464: Base error\n");
|
|
return SCPE_ARG;
|
|
}
|
|
sim_printf("SBC464: Base=%04X\n", uptr->BASE_ADDR);
|
|
return SCPE_OK;
|
|
}
|
|
return SCPE_ARG;
|
|
}
|
|
|
|
// show configuration parameters
|
|
|
|
t_stat isbc464_show_param (FILE *st, UNIT *uptr, int32 val, CONST void *desc)
|
|
{
|
|
fprintf(st, "%s, Size=%04X, Base=%04X ",
|
|
((isbc464_dev.flags & DEV_DIS) == 0) ? "Enabled" : "Disabled",
|
|
uptr->capac, uptr->BASE_ADDR);
|
|
return SCPE_OK;
|
|
}
|
|
|
|
/* Reset routine */
|
|
|
|
t_stat isbc464_reset (DEVICE *dptr)
|
|
{
|
|
if (dptr == NULL)
|
|
return SCPE_ARG;
|
|
if (isbc464_onetime) {
|
|
// isbc464_dev.units->capac = SBC464_SIZE; //set default size
|
|
// isbc464_dev.units->BASE_ADDR = SBC464_BASE; //set default base
|
|
isbc464_onetime = 0;
|
|
}
|
|
if ((dptr->flags & DEV_DIS) == 0) { //already enabled
|
|
isbc464_dev.units->filebuf = (uint8 *)calloc(isbc464_dev.units->capac, sizeof(uint8)); //alloc buffer
|
|
if (isbc464_dev.units->filebuf == NULL) { //CALLOC error
|
|
sim_printf (" sbc464: Calloc error\n");
|
|
return SCPE_MEM;
|
|
}
|
|
sim_printf(" sbc464: Enabled 0%04XH bytes at base 0%04XH\n",
|
|
isbc464_dev.units->capac, isbc464_dev.units->BASE_ADDR);
|
|
} else { //disabled
|
|
if (isbc464_dev.units->filebuf)
|
|
free(isbc464_dev.units->filebuf); //return allocated memory
|
|
// sim_printf(" sbc464: Disabled\n");
|
|
}
|
|
return SCPE_OK;
|
|
}
|
|
|
|
/* isbc464 attach */
|
|
|
|
t_stat isbc464_attach (UNIT *uptr, CONST char *cptr)
|
|
{
|
|
t_stat r;
|
|
|
|
isbc464_reset(NULL); //odd fix, but it works
|
|
if ((r = attach_unit (uptr, cptr)) != SCPE_OK) {
|
|
sim_printf ("isbc464_attach: Error %d\n", r);
|
|
return r;
|
|
}
|
|
return SCPE_OK;
|
|
}
|
|
|
|
/* get a byte from memory */
|
|
|
|
uint8 isbc464_get_mbyte(uint16 addr)
|
|
{
|
|
uint8 val;
|
|
|
|
val = *((uint8 *)isbc464_unit.filebuf + (addr - isbc464_unit.BASE_ADDR));
|
|
return (val & BYTEMASK);
|
|
}
|
|
|
|
/* end of isbc464.c */
|