253 lines
8.3 KiB
C
253 lines
8.3 KiB
C
/* isbc064.c: Intel iSBC064 64K Byte Memory Card
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Copyright (c) 2011, William A. Beech
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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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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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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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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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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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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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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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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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in this Software without prior written authorization from William A. Beech.
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MODIFICATIONS:
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?? ??? 11 -- Original file.
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16 Dec 12 -- Modified to use isbc_80_10.cfg file to set base and size.
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24 Apr 15 -- Modified to use simh_debug
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NOTES:
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These functions support a simulated isbc016, isbc032, isbc048 and isbc064
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memory card on an Intel multibus system.
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*/
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#include "system_defs.h"
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#define BASE_ADDR u3
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#define isbc064_NAME "Intel iSBC 064 RAM Board"
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/* prototypes */
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t_stat isbc064_cfg(uint16 base, uint16 size, uint8 dummy);
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t_stat isbc064_clr(void);
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t_stat isbc064_set_size(UNIT *uptr, int32 val, CONST char *cptr, void *desc);
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t_stat isbc064_set_base(UNIT *uptr, int32 val, CONST char *cptr, void *desc);
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t_stat isbc064_show_param (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
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t_stat isbc064_reset(DEVICE *dptr);
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uint8 isbc064_get_mbyte(uint16 addr);
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void isbc064_put_mbyte(uint16 addr, uint8 val);
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/* external function prototypes */
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/* local globals */
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static const char* isbc064_desc(DEVICE *dptr) {
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return isbc064_NAME;
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}
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/* external globals */
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extern uint8 xack;
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/* isbc064 Standard SIMH Device Data Structures */
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UNIT isbc064_unit = {
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UDATA (NULL, 0, 0)
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};
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MTAB isbc064_mod[] = {
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{ MTAB_XTD | MTAB_VDV, /* mask */
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0, /* match */
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NULL, /* print string */
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"SIZE", /* match string */
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&isbc064_set_size, /* validation routine */
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NULL, /* display routine */
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NULL, /* location descriptor */
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"Sets the RAM size for iSBC 064" /* help string */
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},
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{ MTAB_XTD | MTAB_VDV, /* mask */
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0 /* match */,
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NULL, /* print string */
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"BASE", /* match string */
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&isbc064_set_base, /* validation routine */
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NULL, /* display routine */
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NULL, /* location descriptor */
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"Sets the RAM base for iSBC 064" /* help string */
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},
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{ MTAB_XTD|MTAB_VDV, /* mask */
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0, /* match */
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"PARAM", /* print string */
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NULL, /* match string */
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NULL, /* validation routine */
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&isbc064_show_param, /* display routine */
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NULL, /* location descriptor */
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"Show current Parameters for iSBC 064" /* help string */
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},
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{ 0 }
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};
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DEBTAB isbc064_debug[] = {
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{ "ALL", DEBUG_all },
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{ "FLOW", DEBUG_flow },
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{ "READ", DEBUG_read },
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{ "WRITE", DEBUG_write },
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{ "XACK", DEBUG_xack },
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{ "LEV1", DEBUG_level1 },
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{ "LEV2", DEBUG_level2 },
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{ NULL }
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};
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DEVICE isbc064_dev = {
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"SBC064", //name
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&isbc064_unit, //units
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NULL, //registers
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isbc064_mod, //modifiers
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1, //numunits
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16, //aradix
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16, //awidth
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1, //aincr
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16, //dradix
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8, //dwidth
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NULL, //examine
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NULL, //deposit
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&isbc064_reset, //reset
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NULL, //boot
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NULL, //attach
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NULL, //detach
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NULL, //ctxt
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DEV_DEBUG+DEV_DISABLE+DEV_DIS, //flags
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0, //dctrl
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isbc064_debug, //debflags
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NULL, //msize
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NULL, //lname
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NULL, //help routine
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NULL, //attach help routine
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NULL, //help context
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&isbc064_desc //device description
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};
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/* Service routines to handle simulator functions */
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// isbc064 configuration
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t_stat isbc064_cfg(uint16 base, uint16 size, uint8 dummy)
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{
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isbc064_unit.capac = size;
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isbc064_unit.u3 = base;
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isbc064_dev.units->filebuf = (uint8 *)calloc(isbc064_unit.capac, sizeof(uint8)); //alloc buffer
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if (isbc064_dev.units->filebuf == NULL) { //CALLOC error
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sim_printf (" SBC064: Calloc error\n");
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return SCPE_MEM;
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}
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sim_printf(" SBC064: Enabled 0%04XH bytes at base 0%04XH\n",
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isbc064_dev.units->capac, isbc064_dev.units->BASE_ADDR);
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return SCPE_OK;
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}
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t_stat isbc064_clr(void)
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{
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isbc064_unit.capac = 0;
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isbc064_unit.u3 = 0;
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free(isbc064_unit.filebuf);
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return SCPE_OK;
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}
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// set size parameter
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t_stat isbc064_set_size(UNIT *uptr, int32 val, CONST char *cptr, void *desc)
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{
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uint32 size, result, i;
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if (cptr == NULL)
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return SCPE_ARG;
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result = sscanf(cptr, "%i%n", &size, &i);
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if ((result == 1) && (cptr[i] == 'K') && ((cptr[i + 1] == 0) ||
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((cptr[i + 1] == 'B') && (cptr[i + 2] == 0)))) {
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if (size & 0xff8f) {
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sim_printf("SBC064: Size error\n");
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return SCPE_ARG;
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} else {
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isbc064_unit.capac = (size * 1024) - 1;
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sim_printf("SBC064: Size=%04XH\n", isbc064_unit.capac);
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return SCPE_OK;
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}
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}
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return SCPE_ARG;
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}
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// set base address parameter
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t_stat isbc064_set_base(UNIT *uptr, int32 val, CONST char *cptr, void *desc)
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{
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uint32 size, result, i;
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if (cptr == NULL)
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return SCPE_ARG;
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result = sscanf(cptr, "%i%n", &size, &i);
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if ((result == 1) && (cptr[i] == 'K') && ((cptr[i + 1] == 0) ||
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((cptr[i + 1] == 'B') && (cptr[i + 2] == 0)))) {
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if (size & 0xff8f) {
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sim_printf("SBC064: Base error\n");
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return SCPE_ARG;
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} else {
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isbc064_unit.BASE_ADDR = size * 1024;
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sim_printf("SBC064: Base=%04XH\n", isbc064_unit.BASE_ADDR);
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return SCPE_OK;
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}
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}
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return SCPE_ARG;
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}
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// show configuration parameters
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t_stat isbc064_show_param (FILE *st, UNIT *uptr, int32 val, CONST void *desc)
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{
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fprintf(st, "Device %s, Base address=0%04XH, Size=0%04XH ",
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((isbc064_dev.flags & DEV_DIS) == 0) ? "Enabled" : "Disabled",
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isbc064_unit.BASE_ADDR, isbc064_unit.capac);
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return SCPE_OK;
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}
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/* Reset routine */
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t_stat isbc064_reset (DEVICE *dptr)
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{
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if (dptr == NULL)
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return SCPE_ARG;
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return SCPE_OK;
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}
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/* get a byte from memory */
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uint8 isbc064_get_mbyte(uint16 addr)
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{
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uint8 val;
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val = *((uint8 *)isbc064_unit.filebuf + (addr - isbc064_unit.BASE_ADDR));
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return (val & 0xFF);
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}
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/* put a byte into memory */
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void isbc064_put_mbyte(uint16 addr, uint8 val)
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{
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*((uint8 *)isbc064_unit.filebuf + (addr - isbc064_unit.BASE_ADDR)) = val & 0xFF;
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return;
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}
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/* end of isbc064.c */
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