| /* isbc064.c: Intel iSBC064 64K Byte Memory 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: | |
| ?? ??? 11 - Original file. | |
| 16 Dec 12 - Modified to use isbc_80_10.cfg file to set base and size. | |
| 24 Apr 15 -- Modified to use simh_debug | |
| NOTES: | |
| These functions support a simulated isbc016, isbc032, isbc048 and isbc064 | |
| memory card on an Intel multibus system. | |
| */ | |
| #include "system_defs.h" | |
| #define SET_XACK(VAL) (xack = VAL) | |
| /* prototypes */ | |
| t_stat isbc064_reset (DEVICE *dptr); | |
| uint8 isbc064_get_mbyte(uint16 addr); | |
| void isbc064_put_mbyte(uint16 addr, uint8 val); | |
| extern uint8 xack; /* XACK signal */ | |
| /* isbc064 Standard I/O Data Structures */ | |
| UNIT isbc064_unit = { | |
| UDATA (NULL, UNIT_FIX+UNIT_DISABLE+UNIT_BINK, 65536), KBD_POLL_WAIT | |
| }; | |
| DEBTAB isbc064_debug[] = { | |
| { "ALL", DEBUG_all }, | |
| { "FLOW", DEBUG_flow }, | |
| { "READ", DEBUG_read }, | |
| { "WRITE", DEBUG_write }, | |
| { "XACK", DEBUG_xack }, | |
| { "LEV1", DEBUG_level1 }, | |
| { "LEV2", DEBUG_level2 }, | |
| { NULL } | |
| }; | |
| DEVICE isbc064_dev = { | |
| "SBC064", //name | |
| &isbc064_unit, //units | |
| NULL, //registers | |
| NULL, //modifiers | |
| 1, //numunits | |
| 16, //aradix | |
| 16, //awidth | |
| 1, //aincr | |
| 16, //dradix | |
| 8, //dwidth | |
| NULL, //examine | |
| NULL, //deposite | |
| // &isbc064_reset, //reset | |
| NULL, //reset | |
| NULL, //boot | |
| NULL, //attach | |
| NULL, //detach | |
| NULL, //ctxt | |
| DEV_DEBUG+DEV_DISABLE+DEV_DIS, //flags | |
| 0, //dctrl | |
| isbc064_debug, //debflags | |
| NULL, //msize | |
| NULL //lname | |
| }; | |
| /* iSBC064 globals */ | |
| /* Reset routine */ | |
| t_stat isbc064_reset (DEVICE *dptr) | |
| { | |
| sim_debug (DEBUG_flow, &isbc064_dev, "isbc064_reset: "); | |
| if ((isbc064_dev.flags & DEV_DIS) == 0) { | |
| isbc064_unit.capac = SBC064_SIZE; | |
| isbc064_unit.u3 = SBC064_BASE; | |
| sim_printf("Initializing iSBC-064 RAM Board\n"); | |
| sim_printf(" Available[%04X-%04XH]\n", | |
| isbc064_unit.u3, | |
| isbc064_unit.u3 + isbc064_unit.capac - 1); | |
| } | |
| if (isbc064_unit.filebuf == NULL) { | |
| isbc064_unit.filebuf = (uint8 *)malloc(isbc064_unit.capac); | |
| if (isbc064_unit.filebuf == NULL) { | |
| sim_debug (DEBUG_flow, &isbc064_dev, "isbc064_reset: Malloc error\n"); | |
| return SCPE_MEM; | |
| } | |
| } | |
| sim_debug (DEBUG_flow, &isbc064_dev, "isbc064_reset: Done\n"); | |
| return SCPE_OK; | |
| } | |
| /* get a byte from memory */ | |
| uint8 isbc064_get_mbyte(uint16 addr) | |
| { | |
| uint32 val, org, len; | |
| if ((isbc064_dev.flags & DEV_DIS) == 0) { | |
| org = isbc064_unit.u3; | |
| len = isbc064_unit.capac; | |
| sim_debug (DEBUG_read, &isbc064_dev, "isbc064_get_mbyte: addr=%04X", addr); | |
| sim_debug (DEBUG_read, &isbc064_dev, "isbc064_get_mbyte: org=%04X, len=%04X\n", org, len); | |
| if ((addr >= org) && (addr < (org + len))) { | |
| SET_XACK(1); /* good memory address */ | |
| sim_debug (DEBUG_xack, &isbc064_dev, "isbc064_get_mbyte: Set XACK for %04X\n", addr); | |
| val = *((uint8 *)isbc064_unit.filebuf + (addr - org)); | |
| sim_debug (DEBUG_read, &isbc064_dev, " val=%04X\n", val); | |
| // sim_printf ("isbc064_get_mbyte: addr=%04X, val=%02X\n", addr, val); | |
| return (val & 0xFF); | |
| } else { | |
| sim_debug (DEBUG_read, &isbc064_dev, "isbc064_get_mbyte: Out of range\n"); | |
| return 0; /* multibus has active high pullups and inversion */ | |
| } | |
| } | |
| sim_debug (DEBUG_read, &isbc064_dev, "isbc064_get_mbyte: Disabled\n"); | |
| // sim_printf ("isbc064_get_mbyte: Disabled\n"); | |
| return 0; /* multibus has active high pullups and inversion */ | |
| } | |
| /* put a byte into memory */ | |
| void isbc064_put_mbyte(uint16 addr, uint8 val) | |
| { | |
| uint32 org, len; | |
| if ((isbc064_dev.flags & DEV_DIS) == 0) { | |
| org = isbc064_unit.u3; | |
| len = isbc064_unit.capac; | |
| // sim_printf ("isbc064_put_mbyte: addr=%04X, val=%02X\n", addr, val); | |
| sim_debug (DEBUG_write, &isbc064_dev, "isbc064_put_mbyte: addr=%04X, val=%02X\n", addr, val); | |
| sim_debug (DEBUG_write, &isbc064_dev, "isbc064_put_mbyte: org=%04X, len=%04X\n", org, len); | |
| if ((addr >= org) && (addr < (org + len))) { | |
| SET_XACK(1); /* good memory address */ | |
| sim_debug (DEBUG_write, &isbc064_dev, "isbc064_put_mbyte: Set XACK for %04X\n", addr); | |
| *((uint8 *)isbc064_unit.filebuf + (addr - org)) = val & 0xFF; | |
| sim_debug (DEBUG_write, &isbc064_dev, "isbc064_put_mbyte: Return\n"); | |
| return; | |
| } else { | |
| sim_debug (DEBUG_write, &isbc064_dev, "isbc064_put_mbyte: Out of range\n"); | |
| return; | |
| } | |
| } | |
| sim_debug (DEBUG_write, &isbc064_dev, "isbc064_put_mbyte: Disabled\n"); | |
| // sim_printf ("isbc064_put_mbyte: Disabled\n"); | |
| } | |
| /* end of isbc064.c */ |