| /* pdp1_defs.h: 18b PDP 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. | |
| 22-Jul-05 RMS Fixed definition of CPLS_DPY | |
| 08-Feb-04 PLB Added support for display | |
| 08-Dec-03 RMS Added support for parallel drum | |
| 18-Oct-03 RMS Added DECtape off reel message | |
| 22-Jul-03 RMS Updated for "hardware" RIM loader | |
| Revised to detect I/O wait hang | |
| 05-Dec-02 RMS Added IOT skip support (required by drum) | |
| 14-Apr-99 RMS Changed t_addr to unsigned | |
| The PDP-1 was Digital's first computer. The system design evolved during | |
| its life, and as a result, specifications are sketchy or contradictory. | |
| This simulator is based on the 1962 maintenance manual. | |
| This simulator implements the following options: | |
| Automatic multiply/divide Type 10 | |
| Memory extension control Type 15 | |
| Parallel drum Type 23 | |
| Serial drum Type 24 | |
| Graphic display Type 30 | |
| Line printer control Type 62 | |
| Microtape (DECtape) control Type 550 | |
| */ | |
| #ifndef _PDP1_DEFS_H_ | |
| #define _PDP1_DEFS_H_ 0 | |
| #include "sim_defs.h" | |
| /* Simulator stop codes */ | |
| #define STOP_RSRV 1 /* must be 1 */ | |
| #define STOP_HALT 2 /* HALT */ | |
| #define STOP_IBKPT 3 /* breakpoint */ | |
| #define STOP_XCT 4 /* nested XCT's */ | |
| #define STOP_IND 5 /* nested indirects */ | |
| #define STOP_WAIT 6 /* IO wait hang */ | |
| #define STOP_DTOFF 7 /* DECtape off reel */ | |
| /* Memory */ | |
| #define ASIZE 16 /* address bits */ | |
| #define MAXMEMSIZE (1u << ASIZE) /* max mem size */ | |
| #define AMASK (MAXMEMSIZE - 1) /* address mask */ | |
| #define MEMSIZE (cpu_unit.capac) /* actual memory size */ | |
| #define MEM_ADDR_OK(x) (((uint32) (x)) < MEMSIZE) | |
| /* Architectural constants */ | |
| #define DMASK 0777777 /* data mask */ | |
| #define DAMASK 0007777 /* direct addr */ | |
| #define EPCMASK (AMASK & ~DAMASK) /* extended addr */ | |
| #define IA 0010000 /* indirect flag */ | |
| #define IO_WAIT 0010000 /* I/O sync wait */ | |
| #define IO_CPLS 0004000 /* completion pulse */ | |
| #define OP_DAC 0240000 /* DAC */ | |
| #define OP_DIO 0320000 /* DIO */ | |
| #define OP_JMP 0600000 /* JMP */ | |
| #define GEN_CPLS(x) (((x) ^ ((x) << 1)) & IO_WAIT) /* completion pulse? */ | |
| /* IOT subroutine return codes */ | |
| #define IOT_V_SKP 18 /* skip */ | |
| #define IOT_SKP (1 << IOT_V_SKP) | |
| #define IOT_V_REASON (IOT_V_SKP + 1) /* reason */ | |
| #define IOT_REASON (1 << IOT_V_REASON) | |
| #define IORETURN(f,v) ((f)? (v): SCPE_OK) /* stop on error */ | |
| /* I/O status flags */ | |
| #define IOS_V_LPN 17 /* light pen */ | |
| #define IOS_V_PTR 16 /* paper tape reader */ | |
| #define IOS_V_TTO 15 /* typewriter out */ | |
| #define IOS_V_TTI 14 /* typewriter in */ | |
| #define IOS_V_PTP 13 /* paper tape punch */ | |
| #define IOS_V_DRM 12 /* drum */ | |
| #define IOS_V_SQB 11 /* sequence break */ | |
| #define IOS_V_PNT 2 /* print done */ | |
| #define IOS_V_SPC 1 /* space done */ | |
| #define IOS_V_DRP 0 /* parallel drum busy */ | |
| #define IOS_LPN (1 << IOS_V_LPN) | |
| #define IOS_PTR (1 << IOS_V_PTR) | |
| #define IOS_TTO (1 << IOS_V_TTO) | |
| #define IOS_TTI (1 << IOS_V_TTI) | |
| #define IOS_PTP (1 << IOS_V_PTP) | |
| #define IOS_DRM (1 << IOS_V_DRM) | |
| #define IOS_SQB (1 << IOS_V_SQB) | |
| #define IOS_PNT (1 << IOS_V_PNT) | |
| #define IOS_SPC (1 << IOS_V_SPC) | |
| #define IOS_DRP (1 << IOS_V_DRP) | |
| /* Completion pulses */ | |
| #define CPLS_V_PTR 5 | |
| #define CPLS_V_PTP 4 | |
| #define CPLS_V_TTO 3 | |
| #define CPLS_V_LPT 2 | |
| #define CPLS_V_DPY 1 | |
| #define CPLS_PTR (1 << CPLS_V_PTR) | |
| #define CPLS_PTP (1 << CPLS_V_PTP) | |
| #define CPLS_TTO (1 << CPLS_V_TTO) | |
| #define CPLS_LPT (1 << CPLS_V_LPT) | |
| #define CPLS_DPY (1 << CPLS_V_DPY) | |
| /* Sequence break flags */ | |
| #define SB_V_IP 0 /* in progress */ | |
| #define SB_V_RQ 1 /* request */ | |
| #define SB_V_ON 2 /* enabled */ | |
| #define SB_IP (1 << SB_V_IP) | |
| #define SB_RQ (1 << SB_V_RQ) | |
| #define SB_ON (1 << SB_V_ON) | |
| #endif |