| /* 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); |
| int32 isbc064_get_mbyte(int32 addr); |
| int32 isbc064_get_mword(int32 addr); |
| void isbc064_put_mbyte(int32 addr, int32 val); |
| void isbc064_put_mword(int32 addr, int32 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 |
| 8, //awidth |
| 1, //aincr |
| 16, //dradix |
| 8, //dwidth |
| NULL, //examine |
| NULL, //deposite |
| &isbc064_reset, //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("iSBC 064: Available[%04X-%04XH]\n", |
| isbc064_unit.u3, |
| isbc064_unit.u3 + isbc064_unit.capac - 1); |
| } |
| if (isbc064_unit.filebuf == NULL) { |
| isbc064_unit.filebuf = 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 */ |
| |
| int32 isbc064_get_mbyte(int32 addr) |
| { |
| int32 val, org, len; |
| int i = 0; |
| |
| 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); |
| return (val & 0xFF); |
| } else { |
| sim_debug (DEBUG_read, &isbc064_dev, " Out of range\n"); |
| return 0xFF; /* multibus has active high pullups */ |
| } |
| } |
| sim_debug (DEBUG_read, &isbc064_dev, " Disabled\n"); |
| return 0xFF; /* multibus has active high pullups */ |
| } |
| |
| /* get a word from memory */ |
| |
| int32 isbc064_get_mword(int32 addr) |
| { |
| int32 val; |
| |
| val = isbc064_get_mbyte(addr); |
| val |= (isbc064_get_mbyte(addr+1) << 8); |
| return val; |
| } |
| |
| /* put a byte into memory */ |
| |
| void isbc064_put_mbyte(int32 addr, int32 val) |
| { |
| int32 org, len; |
| int i = 0; |
| |
| if ((isbc064_dev.flags & DEV_DIS) == 0) { |
| org = isbc064_unit.u3; |
| len = isbc064_unit.capac; |
| 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, " Out of range\n"); |
| return; |
| } |
| } |
| sim_debug (DEBUG_write, &isbc064_dev, "isbc064_put_mbyte: Disabled\n"); |
| } |
| |
| /* put a word into memory */ |
| |
| void isbc064_put_mword(int32 addr, int32 val) |
| { |
| isbc064_put_mbyte(addr, val); |
| isbc064_put_mbyte(addr+1, val << 8); |
| } |
| |
| /* end of isbc064.c */ |