| /* mp-8m.c: SWTP 8K Byte Memory Card emulator | |
| Copyright (c) 2011-2012, 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: | |
| 24 Apr 15 -- Modified to use simh_debug | |
| NOTES: | |
| These functions support 6 simulated MP-8M memory cards on an SS-50 system. | |
| Each unit uses a dynamically allocated 8192 byte buffer to hold the data. | |
| Each unit contains the base address in mp_8m_unit.u3. The unit capacity is | |
| held in mp_8m_unit.capac. Each unit can be enabled or disabled to reconfigure | |
| the RAM for the system. | |
| */ | |
| #include <stdio.h> | |
| #include "swtp_defs.h" | |
| #define MP_8M_NUM 6 /* number of MP-*m boards */ | |
| /* prototypes */ | |
| t_stat mp_8m_reset (DEVICE *dptr); | |
| int32 mp_8m_get_mbyte(int32 addr); | |
| int32 mp_8m_get_mword(int32 addr); | |
| void mp_8m_put_mbyte(int32 addr, int32 val); | |
| void mp_8m_put_mword(int32 addr, int32 val); | |
| /* isbc064 Standard I/O Data Structures */ | |
| UNIT mp_8m_unit[] = { | |
| { UDATA (NULL, UNIT_FIX+UNIT_BINK+UNIT_DISABLE, 0),0 }, | |
| { UDATA (NULL, UNIT_FIX+UNIT_BINK+UNIT_DISABLE, 0),0 }, | |
| { UDATA (NULL, UNIT_FIX+UNIT_BINK+UNIT_DISABLE, 0),0 }, | |
| { UDATA (NULL, UNIT_FIX+UNIT_BINK+UNIT_DISABLE, 0),0 }, | |
| { UDATA (NULL, UNIT_FIX+UNIT_BINK+UNIT_DISABLE, 0),0 }, | |
| { UDATA (NULL, UNIT_FIX+UNIT_BINK+UNIT_DISABLE, 0),0 } | |
| }; | |
| MTAB mp_8m_mod[] = { | |
| { 0 } | |
| }; | |
| DEBTAB mp_8m_debug[] = { | |
| { "ALL", DEBUG_all }, | |
| { "FLOW", DEBUG_flow }, | |
| { "READ", DEBUG_read }, | |
| { "WRITE", DEBUG_write }, | |
| { "LEV1", DEBUG_level1 }, | |
| { "LEV2", DEBUG_level2 }, | |
| { NULL } | |
| }; | |
| DEVICE mp_8m_dev = { | |
| "MP-8M", //name | |
| mp_8m_unit, //units | |
| NULL, //registers | |
| mp_8m_mod, //modifiers | |
| MP_8M_NUM, //numunits | |
| 16, //aradix | |
| 8, //awidth | |
| 1, //aincr | |
| 16, //dradix | |
| 8, //dwidth | |
| NULL, //examine | |
| NULL, //deposite | |
| &mp_8m_reset, //reset | |
| NULL, //boot | |
| NULL, //attach | |
| NULL, //detach | |
| NULL, //ctxt | |
| DEV_DEBUG, //flags | |
| 0, //dctrl | |
| mp_8m_debug, //debflags | |
| NULL, //msize | |
| NULL //lname | |
| }; | |
| /* Reset routine */ | |
| t_stat mp_8m_reset (DEVICE *dptr) | |
| { | |
| int32 i, j, val; | |
| UNIT *uptr; | |
| sim_debug (DEBUG_flow, &mp_8m_dev, "mp_8m_reset: \n"); | |
| for (i = 0; i < MP_8M_NUM; i++) { /* init all units */ | |
| uptr = mp_8m_dev.units + i; | |
| sim_debug (DEBUG_flow, &mp_8m_dev, "MP-8M %d unit.flags=%08X\n", | |
| i, uptr->flags); | |
| uptr->capac = 0x2000; | |
| if (i < 4) | |
| uptr->u3 = 0x2000 * i; | |
| else | |
| uptr->u3 = 0x2000 * (i + 1); | |
| if (uptr->filebuf == NULL) { | |
| uptr->filebuf = malloc(0x2000); | |
| if (uptr->filebuf == NULL) { | |
| printf("mp_8m_reset: Malloc error\n"); | |
| return SCPE_MEM; | |
| } | |
| for (j=0; j<8192; j++) { /* fill pattern for testing */ | |
| val = (0xA0 | i); | |
| *((uint8 *)(uptr->filebuf) + j) = val & 0xFF; | |
| } | |
| } | |
| sim_debug (DEBUG_flow, &mp_8m_dev, "MP-8M %d initialized at [%04X-%04XH]\n", | |
| i, uptr->u3, uptr->u3 + uptr->capac - 1); | |
| } | |
| sim_debug (DEBUG_flow, &mp_8m_dev, "mp_8m_reset: Done\n"); | |
| return SCPE_OK; | |
| } | |
| /* I/O instruction handlers, called from the mp-b2 module when an | |
| external memory read or write is issued. | |
| */ | |
| /* get a byte from memory */ | |
| int32 mp_8m_get_mbyte(int32 addr) | |
| { | |
| int32 val, org, len; | |
| int32 i; | |
| UNIT *uptr; | |
| sim_debug (DEBUG_read, &mp_8m_dev, "mp_8m_get_mbyte: addr=%04X", addr); | |
| for (i = 0; i < MP_8M_NUM; i++) { /* find addressed unit */ | |
| uptr = mp_8m_dev.units + i; | |
| org = uptr->u3; | |
| len = uptr->capac - 1; | |
| if ((addr >= org) && (addr <= org + len)) { | |
| val = *((uint8 *)(uptr->filebuf) + (addr - org)); | |
| sim_debug (DEBUG_read, &mp_8m_dev, " val=%04X\n", val); | |
| return (val & 0xFF); | |
| } | |
| } | |
| sim_debug (DEBUG_read, &mp_8m_dev, "mp_8m_get_mbyte: Out of range\n"); | |
| return 0xFF; /* multibus has active high pullups */ | |
| } | |
| /* get a word from memory */ | |
| int32 mp_8m_get_mword(int32 addr) | |
| { | |
| int32 val; | |
| val = (mp_8m_get_mbyte(addr) << 8); | |
| val |= mp_8m_get_mbyte(addr+1); | |
| return val; | |
| } | |
| /* put a byte into memory */ | |
| void mp_8m_put_mbyte(int32 addr, int32 val) | |
| { | |
| int32 org, len; | |
| int32 i; | |
| UNIT *uptr; | |
| sim_debug (DEBUG_write, &mp_8m_dev, "mp_8m_put_mbyte: addr=%04X, val=%02X", | |
| addr, val); | |
| for (i = 0; i < MP_8M_NUM; i++) { /* find addressed unit */ | |
| uptr = mp_8m_dev.units + i; | |
| org = uptr->u3; | |
| len = uptr->capac - 1; | |
| if ((addr >= org) && (addr < org + len)) { | |
| *((uint8 *)(uptr->filebuf) + (addr - org)) = val & 0xFF; | |
| sim_debug (DEBUG_write, &mp_8m_dev, "\n"); | |
| return; | |
| } | |
| } | |
| sim_debug (DEBUG_write, &mp_8m_dev, "mp_8m_put_mbyte: Out of range\n"); | |
| } | |
| /* put a word into memory */ | |
| void mp_8m_put_mword(int32 addr, int32 val) | |
| { | |
| mp_8m_put_mbyte(addr, val >> 8); | |
| mp_8m_put_mbyte(addr+1, val); | |
| } | |
| /* end of mp-8m.c */ |