| /* pdp8_defs.h: PDP-8 simulator definitions | |
| Copyright (c) 1993-2005, Robert M Supnik | |
| 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 | |
| ROBERT M SUPNIK 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 Robert M Supnik shall not be | |
| used in advertising or otherwise to promote the sale, use or other dealings | |
| in this Software without prior written authorization from Robert M Supnik. | |
| 13-Oct-03 RMS Added TSC8-75 support | |
| 04-Oct-02 RMS Added variable device number support | |
| 20-Jan-02 RMS Fixed bug in TTx interrupt enable initialization | |
| 25-Nov-01 RMS Added RL8A support | |
| 16-Sep-01 RMS Added multiple KL support | |
| 18-Mar-01 RMS Added DF32 support | |
| 15-Feb-01 RMS Added DECtape support | |
| 14-Apr-99 RMS Changed t_addr to unsigned | |
| 19-Mar-95 RMS Added dynamic memory size | |
| 02-May-94 RMS Added non-existent memory handling | |
| The author gratefully acknowledges the help of Max Burnet, Richie Lary, | |
| and Bill Haygood in resolving questions about the PDP-8 | |
| */ | |
| #ifndef _PDP8_DEFS_H_ | |
| #define _PDP8_DEFS_H_ 0 | |
| #include "sim_defs.h" /* simulator defns */ | |
| /* Simulator stop codes */ | |
| #define STOP_RSRV 1 /* must be 1 */ | |
| #define STOP_HALT 2 /* HALT */ | |
| #define STOP_IBKPT 3 /* breakpoint */ | |
| #define STOP_NOTSTD 4 /* non-std devno */ | |
| #define STOP_DTOFF 5 /* DECtape off reel */ | |
| /* Memory */ | |
| #define MAXMEMSIZE 32768 /* max memory size */ | |
| #define MEMSIZE (cpu_unit.capac) /* actual memory size */ | |
| #define ADDRMASK (MAXMEMSIZE - 1) /* address mask */ | |
| #define MEM_ADDR_OK(x) (((uint32) (x)) < MEMSIZE) | |
| /* IOT subroutine return codes */ | |
| #define IOT_V_SKP 12 /* skip */ | |
| #define IOT_V_REASON 13 /* reason */ | |
| #define IOT_SKP (1 << IOT_V_SKP) | |
| #define IOT_REASON (1 << IOT_V_REASON) | |
| #define IORETURN(f,v) ((f)? (v): SCPE_OK) /* stop on error */ | |
| /* Timers */ | |
| #define TMR_CLK 0 /* timer 0 = clock */ | |
| #define TMR_TTX 1 /* timer 1 = TTx */ | |
| /* Device information block */ | |
| #define DEV_MAXBLK 8 /* max dev block */ | |
| #define DEV_MAX 64 /* total devices */ | |
| typedef struct { | |
| uint32 dev; /* base dev number */ | |
| uint32 num; /* number of slots */ | |
| int32 (*dsp[DEV_MAXBLK])(int32 IR, int32 dat); | |
| } DIB; | |
| /* Standard device numbers */ | |
| #define DEV_PTR 001 /* paper tape reader */ | |
| #define DEV_PTP 002 /* paper tape punch */ | |
| #define DEV_TTI 003 /* console input */ | |
| #define DEV_TTO 004 /* console output */ | |
| #define DEV_CLK 013 /* clock */ | |
| #define DEV_TSC 036 | |
| #define DEV_KJ8 040 /* extra terminals */ | |
| #define DEV_DF 060 /* DF32 */ | |
| #define DEV_RF 060 /* RF08 */ | |
| #define DEV_RL 060 /* RL8A */ | |
| #define DEV_LPT 066 /* line printer */ | |
| #define DEV_MT 070 /* TM8E */ | |
| #define DEV_RK 074 /* RK8E */ | |
| #define DEV_RX 075 /* RX8E/RX28 */ | |
| #define DEV_DTA 076 /* TC08 */ | |
| #define DEV_TD8E 077 /* TD8E */ | |
| /* Interrupt flags | |
| The interrupt flags consist of three groups: | |
| 1. Devices with individual interrupt enables. These record | |
| their interrupt requests in device_done and their enables | |
| in device_enable, and must occupy the low bit positions. | |
| 2. Devices without interrupt enables. These record their | |
| interrupt requests directly in int_req, and must occupy | |
| the middle bit positions. | |
| 3. Overhead. These exist only in int_req and must occupy the | |
| high bit positions. | |
| Because the PDP-8 does not have priority interrupts, the order | |
| of devices within groups does not matter. | |
| Note: all extra KL input and output interrupts must be assigned | |
| to contiguous bits. | |
| */ | |
| #define INT_V_START 0 /* enable start */ | |
| #define INT_V_LPT (INT_V_START+0) /* line printer */ | |
| #define INT_V_PTP (INT_V_START+1) /* tape punch */ | |
| #define INT_V_PTR (INT_V_START+2) /* tape reader */ | |
| #define INT_V_TTO (INT_V_START+3) /* terminal */ | |
| #define INT_V_TTI (INT_V_START+4) /* keyboard */ | |
| #define INT_V_CLK (INT_V_START+5) /* clock */ | |
| #define INT_V_TTO1 (INT_V_START+6) /* tto1 */ | |
| #define INT_V_TTO2 (INT_V_START+7) /* tto2 */ | |
| #define INT_V_TTO3 (INT_V_START+8) /* tto3 */ | |
| #define INT_V_TTO4 (INT_V_START+9) /* tto4 */ | |
| #define INT_V_TTI1 (INT_V_START+10) /* tti1 */ | |
| #define INT_V_TTI2 (INT_V_START+11) /* tti2 */ | |
| #define INT_V_TTI3 (INT_V_START+12) /* tti3 */ | |
| #define INT_V_TTI4 (INT_V_START+13) /* tti4 */ | |
| #define INT_V_DIRECT (INT_V_START+14) /* direct start */ | |
| #define INT_V_RX (INT_V_DIRECT+0) /* RX8E */ | |
| #define INT_V_RK (INT_V_DIRECT+1) /* RK8E */ | |
| #define INT_V_RF (INT_V_DIRECT+2) /* RF08 */ | |
| #define INT_V_DF (INT_V_DIRECT+3) /* DF32 */ | |
| #define INT_V_MT (INT_V_DIRECT+4) /* TM8E */ | |
| #define INT_V_DTA (INT_V_DIRECT+5) /* TC08 */ | |
| #define INT_V_RL (INT_V_DIRECT+6) /* RL8A */ | |
| #define INT_V_PWR (INT_V_DIRECT+7) /* power int */ | |
| #define INT_V_UF (INT_V_DIRECT+8) /* user int */ | |
| #define INT_V_TSC (INT_V_DIRECT+9) /* TSC8-75 int */ | |
| #define INT_V_OVHD (INT_V_DIRECT+10) /* overhead start */ | |
| #define INT_V_NO_ION_PENDING (INT_V_OVHD+0) /* ion pending */ | |
| #define INT_V_NO_CIF_PENDING (INT_V_OVHD+1) /* cif pending */ | |
| #define INT_V_ION (INT_V_OVHD+2) /* interrupts on */ | |
| #define INT_LPT (1 << INT_V_LPT) | |
| #define INT_PTP (1 << INT_V_PTP) | |
| #define INT_PTR (1 << INT_V_PTR) | |
| #define INT_TTO (1 << INT_V_TTO) | |
| #define INT_TTI (1 << INT_V_TTI) | |
| #define INT_CLK (1 << INT_V_CLK) | |
| #define INT_TTO1 (1 << INT_V_TTO1) | |
| #define INT_TTO2 (1 << INT_V_TTO2) | |
| #define INT_TTO3 (1 << INT_V_TTO3) | |
| #define INT_TTO4 (1 << INT_V_TTO4) | |
| #define INT_TTI1 (1 << INT_V_TTI1) | |
| #define INT_TTI2 (1 << INT_V_TTI2) | |
| #define INT_TTI3 (1 << INT_V_TTI3) | |
| #define INT_TTI4 (1 << INT_V_TTI4) | |
| #define INT_RX (1 << INT_V_RX) | |
| #define INT_RK (1 << INT_V_RK) | |
| #define INT_RF (1 << INT_V_RF) | |
| #define INT_DF (1 << INT_V_DF) | |
| #define INT_MT (1 << INT_V_MT) | |
| #define INT_DTA (1 << INT_V_DTA) | |
| #define INT_RL (1 << INT_V_RL) | |
| #define INT_PWR (1 << INT_V_PWR) | |
| #define INT_UF (1 << INT_V_UF) | |
| #define INT_TSC (1 << INT_V_TSC) | |
| #define INT_NO_ION_PENDING (1 << INT_V_NO_ION_PENDING) | |
| #define INT_NO_CIF_PENDING (1 << INT_V_NO_CIF_PENDING) | |
| #define INT_ION (1 << INT_V_ION) | |
| #define INT_DEV_ENABLE ((1 << INT_V_DIRECT) - 1) /* devices w/enables */ | |
| #define INT_ALL ((1 << INT_V_OVHD) - 1) /* all interrupts */ | |
| #define INT_INIT_ENABLE (INT_TTI+INT_TTO+INT_PTR+INT_PTP+INT_LPT) | \ | |
| (INT_TTI1+INT_TTI2+INT_TTI3+INT_TTI4) | \ | |
| (INT_TTO1+INT_TTO2+INT_TTO3+INT_TTO4) | |
| #define INT_PENDING (INT_ION+INT_NO_CIF_PENDING+INT_NO_ION_PENDING) | |
| #define INT_UPDATE ((int_req & ~INT_DEV_ENABLE) | (dev_done & int_enable)) | |
| /* Function prototypes */ | |
| t_stat set_dev (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat show_dev (FILE *st, UNIT *uptr, int32 val, void *desc); | |
| #endif |