| /* i1620_defs.h: IBM 1620 simulator definitions | |
| Copyright (c) 2002-2005, 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. | |
| This simulator is based on the 1620 simulator written by Geoff Kuenning. | |
| I am grateful to Al Kossow, the Computer History Museum, and the IBM Corporate | |
| Archives for their help in gathering documentation about the IBM 1620. | |
| 18-Oct-02 RMS Fixed bug in ADDR_S macro (found by Hans Pufal) | |
| */ | |
| #ifndef _I1620_DEFS_H_ | |
| #define _I1620_DEFS_H_ 0 | |
| #include "sim_defs.h" /* simulator defns */ | |
| /* Simulator stop codes */ | |
| #define STOP_HALT 1 /* HALT */ | |
| #define STOP_IBKPT 2 /* breakpoint */ | |
| #define STOP_INVINS 3 /* invalid instruction */ | |
| #define STOP_INVDIG 4 /* invalid digit */ | |
| #define STOP_INVCHR 5 /* invalid char */ | |
| #define STOP_INVIND 6 /* invalid indicator */ | |
| #define STOP_INVPDG 7 /* invalid P addr digit */ | |
| #define STOP_INVPAD 8 /* invalid P addr */ | |
| #define STOP_INVPIA 9 /* invalid P indir addr */ | |
| #define STOP_INVQDG 10 /* invalid Q addr digits */ | |
| #define STOP_INVQAD 11 /* invalid Q addr */ | |
| #define STOP_INVQIA 12 /* invalid Q indir addr */ | |
| #define STOP_INVIO 13 /* invalid IO address */ | |
| #define STOP_INVRTN 14 /* invalid return */ | |
| #define STOP_INVFNC 15 /* invalid function */ | |
| #define STOP_INVIAD 16 /* invalid instr addr */ | |
| #define STOP_INVSEL 17 /* invalid select */ | |
| #define STOP_INVIDX 18 /* invalid index instr */ | |
| #define STOP_INVEAD 19 /* invalid even addr */ | |
| #define STOP_INVDCF 20 /* invalid DCF addr */ | |
| #define STOP_INVDRV 21 /* invalid disk drive */ | |
| #define STOP_INVDSC 22 /* invalid disk sector */ | |
| #define STOP_INVDCN 23 /* invalid disk count */ | |
| #define STOP_INVDBA 24 /* invalid disk buf addr */ | |
| #define STOP_DACERR 25 /* disk addr comp err */ | |
| #define STOP_DWCERR 26 /* disk wr check err */ | |
| #define STOP_CYOERR 27 /* cylinder ovflo err */ | |
| #define STOP_WRLERR 28 /* wrong rec lnt err */ | |
| #define STOP_CCT 29 /* runaway CCT */ | |
| #define STOP_FWRAP 30 /* field wrap */ | |
| #define STOP_RWRAP 31 /* record wrap */ | |
| #define STOP_NOCD 32 /* no card in reader */ | |
| #define STOP_OVERFL 33 /* overflow */ | |
| #define STOP_EXPCHK 34 /* exponent error */ | |
| #define STOP_WRADIS 35 /* write addr disabled */ | |
| #define STOP_FPLNT 36 /* invalid fp length */ | |
| #define STOP_FPUNL 37 /* fp lengths unequal */ | |
| #define STOP_FPMF 38 /* no flag on exp */ | |
| #define STOP_FPDVZ 39 /* divide by zero */ | |
| /* Memory */ | |
| #define MAXMEMSIZE 60000 /* max mem size */ | |
| #define MEMSIZE (cpu_unit.capac) /* act memory size */ | |
| /* Processor parameters */ | |
| #define INST_LEN 12 /* inst length */ | |
| #define ADDR_LEN 5 /* addr length */ | |
| #define MUL_TABLE 100 /* multiply table */ | |
| #define MUL_TABLE_LEN 200 | |
| #define ADD_TABLE 300 /* add table */ | |
| #define ADD_TABLE_LEN 100 | |
| #define IDX_A 300 /* index A base */ | |
| #define IDX_B 340 /* index B base */ | |
| #define PROD_AREA 80 /* product area */ | |
| #define PROD_AREA_LEN 20 /* product area */ | |
| #define PROD_AREA_END (PROD_AREA + PROD_AREA_LEN) | |
| /* Branch indicator codes */ | |
| #define NUM_IND 100 /* number of indicators */ | |
| #define IN_SW1 1 /* sense switch 1 */ | |
| #define IN_SW2 2 /* sense switch 2 */ | |
| #define IN_SW3 3 /* sense switch 3 */ | |
| #define IN_SW4 4 /* sense switch 4 */ | |
| #define IN_RDCHK 6 /* read check (I/O error) */ | |
| #define IN_WRCHK 7 /* write check (I/O error) */ | |
| #define IN_LAST 9 /* last card was just read */ | |
| #define IN_HP 11 /* high or positive result */ | |
| #define IN_EZ 12 /* equal or zero result */ | |
| #define IN_HPEZ 13 /* high/positive or equal/zero */ | |
| #define IN_OVF 14 /* overflow */ | |
| #define IN_EXPCHK 15 /* floating exponent check */ | |
| #define IN_MBREVEN 16 /* even parity check */ | |
| #define IN_MBRODD 17 /* odd parity check */ | |
| #define IN_ANYCHK 19 /* any of read, write, even/odd */ | |
| #define IN_PRCHK 25 /* printer check */ | |
| #define IN_IXN 30 /* IX neither */ | |
| #define IN_IXA 31 /* IX A band */ | |
| #define IN_IXB 32 /* IX B band */ | |
| #define IN_PRCH9 33 /* printer chan 9 */ | |
| #define IN_PRCH12 34 /* printer chan 12 */ | |
| #define IN_PRBSY 35 /* printer busy */ | |
| #define IN_DACH 36 /* disk addr/data check */ | |
| #define IN_DWLR 37 /* disk rec length */ | |
| #define IN_DCYO 38 /* disk cyl overflow */ | |
| #define IN_DERR 39 /* disk any error */ | |
| /* I/O channel codes */ | |
| #define NUM_IO 100 /* number of IO chan */ | |
| #define IO_TTY 1 /* console typewriter */ | |
| #define IO_PTP 2 /* paper-tape punch */ | |
| #define IO_PTR 3 /* paper-tape reader */ | |
| #define IO_CDP 4 /* card punch */ | |
| #define IO_CDR 5 /* card reader */ | |
| #define IO_DSK 7 /* disk */ | |
| #define IO_LPT 9 /* line printer */ | |
| #define IO_BTP 32 /* binary ptp */ | |
| #define IO_BTR 33 /* binary ptr */ | |
| #define LPT_WIDTH 120 /* line print width */ | |
| #define CCT_LNT 132 /* car ctrl length */ | |
| #define CRETIOE(f,c) return ((f)? (c): SCPE_OK) | |
| /* Memory representation: flag + BCD digit per byte */ | |
| #define FLAG 0x10 | |
| #define DIGIT 0x0F | |
| #define REC_MARK 0xA | |
| #define NUM_BLANK 0xC | |
| #define GRP_MARK 0xF | |
| #define BAD_DIGIT(x) ((x) > 9) | |
| /* Instruction format */ | |
| #define I_OP 0 /* opcode */ | |
| #define I_P 2 /* P start */ | |
| #define I_PL 6 /* P end */ | |
| #define I_Q 7 /* Q start */ | |
| #define I_QL 11 /* Q end */ | |
| #define I_IO 8 /* IO select */ | |
| #define I_BR 8 /* indicator select */ | |
| #define I_CTL 10 /* control select */ | |
| #define I_SEL 11 /* BS select */ | |
| #define ADDR_A(x,a) ((((x) + (a)) >= MEMSIZE)? ((x) + (a) - MEMSIZE): ((x) + (a))) | |
| #define ADDR_S(x,a) (((x) < (a))? ((x) - (a) + MEMSIZE): ((x) - (a))) | |
| #define PP(x) x = ADDR_A(x,1) | |
| #define MM(x) x = ADDR_S(x,1) | |
| /* CPU options, stored in cpu_unit.flags */ | |
| /* Decoding flags must be part of the same definition set */ | |
| #define UNIT_SCP ((1 << UNIT_V_UF) - 1) /* mask of SCP flags */ | |
| #define IF_MII (1 << (UNIT_V_UF + 0)) /* model 2 */ | |
| #define IF_DIV (1 << (UNIT_V_UF + 1)) /* automatic divide */ | |
| #define IF_IA (1 << (UNIT_V_UF + 2)) /* indirect addressing */ | |
| #define IF_EDT (1 << (UNIT_V_UF + 3)) /* edit */ | |
| #define IF_FP (1 << (UNIT_V_UF + 4)) /* floating point */ | |
| #define IF_BIN (1 << (UNIT_V_UF + 5)) /* binary */ | |
| #define IF_IDX (1 << (UNIT_V_UF + 6)) /* indexing */ | |
| #define IF_VPA (1 << (UNIT_V_UF + 7)) /* valid P addr */ | |
| #define IF_VQA (1 << (UNIT_V_UF + 8)) /* valid Q addr */ | |
| #define IF_4QA (1 << (UNIT_V_UF + 9)) /* 4 char Q addr */ | |
| #define IF_NQX (1 << (UNIT_V_UF + 10)) /* no Q indexing */ | |
| #define IF_IMM (1 << (UNIT_V_UF + 11)) /* immediate */ | |
| #define UNIT_BCD (1 << (UNIT_V_UF + 12)) /* BCD coded */ | |
| #define UNIT_MSIZE (1 << (UNIT_V_UF + 13)) /* fake flag */ | |
| #define ALLOPT (IF_DIV + IF_IA + IF_EDT + IF_FP + IF_BIN + IF_IDX) | |
| #define MI_OPT (IF_DIV + IF_IA + IF_EDT + IF_FP) | |
| #define MI_STD (IF_DIV + IF_IA + IF_EDT) | |
| #define MII_OPT (ALLOPT) | |
| #define MII_STD (IF_DIV + IF_IA + IF_EDT + IF_BIN + IF_IDX) | |
| /* Add status codes */ | |
| #define ADD_NOCRY 0 /* no carry out */ | |
| #define ADD_CARRY 1 /* carry out */ | |
| #define ADD_SIGNC 2 /* sign change */ | |
| /* Opcodes */ | |
| enum opcodes { | |
| OP_FADD = 1, OP_FSUB, OP_FMUL, /* 00 - 09 */ | |
| OP_FSL = 5, OP_TFL, OP_BTFL, OP_FSR, OP_FDIV, | |
| OP_BTAM = 10, OP_AM, OP_SM, OP_MM, OP_CM, /* 10 - 19 */ | |
| OP_TDM, OP_TFM, OP_BTM, OP_LDM, OP_DM, | |
| OP_BTA = 20, OP_A, OP_S, OP_M, OP_C, /* 20 - 29 */ | |
| OP_TD, OP_TF, OP_BT, OP_LD, OP_D, | |
| OP_TRNM = 30, OP_TR, OP_SF, OP_CF, OP_K, /* 30 - 39 */ | |
| OP_DN, OP_RN, OP_RA, OP_WN, OP_WA, | |
| OP_NOP = 41, OP_BB, OP_BD, OP_BNF, /* 40 - 49 */ | |
| OP_BNR, OP_BI, OP_BNI, OP_H, OP_B, | |
| OP_BNG = 55, | |
| OP_BS = 60, OP_BX, OP_BXM, OP_BCX, OP_BCXM, /* 60 - 69 */ | |
| OP_BLX, OP_BLXM, OP_BSX, | |
| OP_MA = 70, OP_MF, OP_TNS, OP_TNF, /* 70 - 79 */ | |
| /* 80 - 89 */ | |
| OP_BBT = 90, OP_BMK, OP_ORF, OP_ANDF, OP_CPLF, /* 90 - 99 */ | |
| OP_EORF, OP_OTD, OP_DTO }; | |
| #endif |