| /* hp2100_sys.c: HP 2100 simulator interface | |
| Copyright (c) 1993-2013, 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. | |
| 05-Feb-13 JDB Added hp_fprint_stopped to handle HLT instruction message | |
| 18-Mar-13 JDB Moved CPU state variable declarations to hp2100_cpu.h | |
| 09-May-12 JDB Quieted warnings for assignments in conditional expressions | |
| 10-Feb-12 JDB Deprecated DEVNO in favor of SC | |
| Added hp_setsc, hp_showsc functions to support SC modifier | |
| 15-Dec-11 JDB Added DA and dummy DC devices | |
| 29-Oct-10 JDB DMA channels renamed from 0,1 to 1,2 to match documentation | |
| 26-Oct-10 JDB Changed DIB access for revised signal model | |
| 03-Sep-08 JDB Fixed IAK instruction dual-use mnemonic display | |
| 07-Aug-08 JDB Moved hp_setdev, hp_showdev from hp2100_cpu.c | |
| Changed sim_load to use WritePW instead of direct M[] access | |
| 18-Jun-08 JDB Added PIF device | |
| 17-Jun-08 JDB Moved fmt_char() function from hp2100_baci.c | |
| 26-May-08 JDB Added MPX device | |
| 24-Apr-08 JDB Changed fprint_sym to handle step with irq pending | |
| 07-Dec-07 JDB Added BACI device | |
| 27-Nov-07 JDB Added RTE OS/VMA/EMA mnemonics | |
| 21-Dec-06 JDB Added "fwanxm" external for sim_load check | |
| 19-Nov-04 JDB Added STOP_OFFLINE, STOP_PWROFF messages | |
| 25-Sep-04 JDB Added memory protect device | |
| Fixed display of CCA/CCB/CCE instructions | |
| 01-Jun-04 RMS Added latent 13037 support | |
| 19-Apr-04 RMS Recognize SFS x,C and SFC x,C | |
| 22-Mar-02 RMS Revised for dynamically allocated memory | |
| 14-Feb-02 RMS Added DMS instructions | |
| 04-Feb-02 RMS Fixed bugs in alter/skip display and parsing | |
| 01-Feb-02 RMS Added terminal multiplexor support | |
| 16-Jan-02 RMS Added additional device support | |
| 17-Sep-01 RMS Removed multiconsole support | |
| 27-May-01 RMS Added multiconsole support | |
| 14-Mar-01 RMS Revised load/dump interface (again) | |
| 30-Oct-00 RMS Added examine to file support | |
| 15-Oct-00 RMS Added dynamic device number support | |
| 27-Oct-98 RMS V2.4 load interface | |
| */ | |
| #include "hp2100_defs.h" | |
| #include "hp2100_cpu.h" | |
| #include <ctype.h> | |
| extern DEVICE mp_dev; | |
| extern DEVICE dma1_dev, dma2_dev; | |
| extern DEVICE ptr_dev, ptp_dev; | |
| extern DEVICE tty_dev, clk_dev; | |
| extern DEVICE lps_dev; | |
| extern DEVICE lpt_dev; | |
| extern DEVICE baci_dev; | |
| extern DEVICE mpx_dev; | |
| extern DEVICE mtd_dev, mtc_dev; | |
| extern DEVICE msd_dev, msc_dev; | |
| extern DEVICE dpd_dev, dpc_dev; | |
| extern DEVICE dqd_dev, dqc_dev; | |
| extern DEVICE drd_dev, drc_dev; | |
| extern DEVICE ds_dev; | |
| extern DEVICE muxl_dev, muxu_dev, muxc_dev; | |
| extern DEVICE ipli_dev, iplo_dev; | |
| extern DEVICE pif_dev; | |
| extern DEVICE da_dev, dc_dev; | |
| /* SCP data structures and interface routines | |
| sim_name simulator name string | |
| sim_PC pointer to saved PC register descriptor | |
| sim_emax maximum number of words for examine/deposit | |
| sim_devices array of pointers to simulated devices | |
| sim_stop_messages array of pointers to stop messages | |
| sim_load binary loader | |
| */ | |
| char sim_name[] = "HP 2100"; | |
| REG *sim_PC = &cpu_reg[0]; | |
| int32 sim_emax = 3; | |
| DEVICE *sim_devices[] = { | |
| &cpu_dev, | |
| &mp_dev, | |
| &dma1_dev, &dma2_dev, | |
| &ptr_dev, | |
| &ptp_dev, | |
| &tty_dev, | |
| &clk_dev, | |
| &lps_dev, | |
| &lpt_dev, | |
| &baci_dev, | |
| &mpx_dev, | |
| &dpd_dev, &dpc_dev, | |
| &dqd_dev, &dqc_dev, | |
| &drd_dev, &drc_dev, | |
| &ds_dev, | |
| &mtd_dev, &mtc_dev, | |
| &msd_dev, &msc_dev, | |
| &muxl_dev, &muxu_dev, &muxc_dev, | |
| &ipli_dev, &iplo_dev, | |
| &pif_dev, | |
| &da_dev, &dc_dev, | |
| NULL | |
| }; | |
| const char *sim_stop_messages[] = { | |
| "Unknown error", | |
| "Unimplemented instruction", | |
| "Non-existent I/O device", | |
| "HALT instruction", | |
| "Breakpoint", | |
| "Indirect address loop", | |
| "Indirect address interrupt (should not happen!)", | |
| "No connection on interprocessor link", | |
| "Device/unit offline", | |
| "Device/unit powered off" | |
| }; | |
| /* Print additional information for simulator stops. | |
| The HP 21xx/1000 halt instruction ("HLT") opcode includes select code and | |
| device flag hold/clear bit fields. In practice, these are not used to affect | |
| the device interface; rather, they communicate to the operator the | |
| significance of the particular halt encountered. | |
| Under simulation, the halt opcode must be communicated to the user as part of | |
| the stop message. To so do, we define a sim_vm_fprint_stopped handler that | |
| is called for all VM stops. When called for a STOP_HALT, the halt message | |
| has been printed, and we add the opcode value in the T register before | |
| returning TRUE, so that SCP will add the program counter value. For example: | |
| HALT instruction 102077, P: 00101 (NOP) | |
| Reasons other than STOP_HALT need no additional information. | |
| Implementation notes: | |
| 1. The octal halt instruction will always be of the form 10x0xx. We take | |
| advantage of this to request 19 bits printed with leading spaces. This | |
| adds a leading space to separate the value from the message. | |
| */ | |
| t_bool hp_fprint_stopped (FILE *st, t_stat reason) | |
| { | |
| if (reason == STOP_HALT) | |
| fprint_val (st, TR, 8, 19, PV_RSPC); | |
| return TRUE; | |
| } | |
| /* Binary loader | |
| The binary loader consists of blocks preceded and trailed by zero frames. | |
| A block consists of 16b words (punched big endian), as follows: | |
| count'xxx | |
| origin | |
| word 0 | |
| : | |
| word count-1 | |
| checksum | |
| The checksum includes the origin but not the count. | |
| */ | |
| int32 fgetw (FILE *fileref) | |
| { | |
| int c1, c2; | |
| if ((c1 = fgetc (fileref)) == EOF) return -1; | |
| if ((c2 = fgetc (fileref)) == EOF) return -1; | |
| return ((c1 & 0377) << 8) | (c2 & 0377); | |
| } | |
| t_stat sim_load (FILE *fileref, char *cptr, char *fnam, int flag) | |
| { | |
| int32 origin, csum, zerocnt, count, word, i; | |
| if ((*cptr != 0) || (flag != 0)) return SCPE_ARG; | |
| for (zerocnt = 1;; zerocnt = -10) { /* block loop */ | |
| for (;; zerocnt++) { /* skip 0's */ | |
| if ((count = fgetc (fileref)) == EOF) return SCPE_OK; | |
| else if (count) break; | |
| else if (zerocnt == 0) return SCPE_OK; | |
| } | |
| if (fgetc (fileref) == EOF) return SCPE_FMT; | |
| if ((origin = fgetw (fileref)) < 0) return SCPE_FMT; | |
| csum = origin; /* seed checksum */ | |
| for (i = 0; i < count; i++) { /* get data words */ | |
| if ((word = fgetw (fileref)) < 0) return SCPE_FMT; | |
| WritePW (origin, word); | |
| origin = origin + 1; | |
| csum = csum + word; | |
| } | |
| if ((word = fgetw (fileref)) < 0) return SCPE_FMT; | |
| if ((word ^ csum) & DMASK) return SCPE_CSUM; | |
| } | |
| } | |
| /* Symbol tables */ | |
| #define I_V_FL 16 /* flag start */ | |
| #define I_M_FL 017 /* flag mask */ | |
| #define I_V_NPN 0 /* no operand */ | |
| #define I_V_NPC 1 /* no operand + C */ | |
| #define I_V_MRF 2 /* mem ref */ | |
| #define I_V_ASH 3 /* alter/skip, shift */ | |
| #define I_V_ESH 4 /* extended shift */ | |
| #define I_V_EMR 5 /* extended mem ref */ | |
| #define I_V_IO1 6 /* I/O + HC */ | |
| #define I_V_IO2 7 /* I/O only */ | |
| #define I_V_EGZ 010 /* ext grp, 1 op + 0 */ | |
| #define I_V_EG2 011 /* ext grp, 2 op */ | |
| #define I_V_ALT 012 /* alternate use instr */ | |
| #define I_NPN (I_V_NPN << I_V_FL) | |
| #define I_NPC (I_V_NPC << I_V_FL) | |
| #define I_MRF (I_V_MRF << I_V_FL) | |
| #define I_ASH (I_V_ASH << I_V_FL) | |
| #define I_ESH (I_V_ESH << I_V_FL) | |
| #define I_EMR (I_V_EMR << I_V_FL) | |
| #define I_IO1 (I_V_IO1 << I_V_FL) | |
| #define I_IO2 (I_V_IO2 << I_V_FL) | |
| #define I_EGZ (I_V_EGZ << I_V_FL) | |
| #define I_EG2 (I_V_EG2 << I_V_FL) | |
| #define I_ALT (I_V_ALT << I_V_FL) | |
| static const int32 masks[] = { | |
| 0177777, 0176777, 0074000, 0170000, | |
| 0177760, 0177777, 0176700, 0177700, | |
| 0177777, 0177777, 0177777 | |
| }; | |
| static const char *opcode[] = { | |
| /* These mnemonics are used by debug printouts, so put them first. */ | |
| "$LIBR", "$LIBX", ".TICK", ".TNAM", /* RTE-6/VM OS firmware */ | |
| ".STIO", ".FNW", ".IRT", ".LLS", | |
| ".SIP", ".YLD", ".CPM", ".ETEQ", | |
| ".ENTN", "$OTST", ".ENTC", ".DSPI", | |
| "$DCPC", "$MPV", "$DEV", "$TBG", /* alternates for dual-use */ | |
| ".PMAP", "$LOC", "$VTST",/* --- */ /* RTE-6/VM VMA firmware */ | |
| /* --- --- --- --- */ | |
| ".IMAP", ".IMAR", ".JMAP", ".JMAR", | |
| ".LPXR", ".LPX", ".LBPR", ".LBP", | |
| ".EMIO", "MMAP", "$ETST",/* --- */ /* RTE-IV EMA firmware */ | |
| /* --- --- --- --- */ | |
| /* --- --- --- --- */ | |
| /* --- --- --- */ ".EMAP", | |
| /* Regular mnemonics. */ | |
| "NOP", "NOP", "AND", "JSB", | |
| "XOR", "JMP", "IOR", "ISZ", | |
| "ADA", "ADB" ,"CPA", "CPB", | |
| "LDA", "LDB", "STA", "STB", | |
| "DIAG", "ASL", "LSL", "TIMER", | |
| "RRL", "ASR", "LSR", "RRR", | |
| "MPY", "DIV", "DLD", "DST", | |
| "FAD", "FSB", "FMP", "FDV", | |
| "FIX", "FLT", | |
| "STO", "CLO", "SOC", "SOS", | |
| "HLT", "STF", "CLF", | |
| "SFC", "SFS", "MIA", "MIB", | |
| "LIA", "LIB", "OTA", "OTB", | |
| "STC", "CLC", | |
| "SYA", "USA", "PAA", "PBA", | |
| "XMA", | |
| "XLA", "XSA", "XCA", "LFA", | |
| "RSA", "RVA", | |
| "MBI", "MBF", | |
| "MBW", "MWI", "MWF", "MWW", | |
| "SYB", "USB", "PAB", "PBB", | |
| "SSM", "JRS", | |
| "XMM", "XMS", "XMB", | |
| "XLB", "XSB", "XCB", "LFB", | |
| "RSB", "RVB", "DJP", "DJS", | |
| "SJP", "SJS", "UJP", "UJS", | |
| "SAX", "SBX", "CAX", "CBX", | |
| "LAX", "LBX", "STX", | |
| "CXA", "CXB", "LDX", | |
| "ADX", "XAX", "XBX", | |
| "SAY", "SBY", "CAY", "CBY", | |
| "LAY", "LBY", "STY", | |
| "CYA", "CYB", "LDY", | |
| "ADY", "XAY", "XBY", | |
| "ISX", "DSX", "JLY", "LBT", | |
| "SBT", "MBT", "CBT", "SBT", | |
| "ISY", "DSY", "JPY", "SBS", | |
| "CBS", "TBS", "CMW", "MVW", | |
| NULL, /* decode only */ | |
| NULL | |
| }; | |
| static const int32 opc_val[] = { | |
| 0105340+I_NPN, 0105341+I_NPN, 0105342+I_NPN, 0105343+I_NPN, /* RTE-6/VM OS */ | |
| 0105344+I_NPN, 0105345+I_NPN, 0105346+I_NPN, 0105347+I_NPN, | |
| 0105350+I_NPN, 0105351+I_NPN, 0105352+I_NPN, 0105353+I_NPN, | |
| 0105354+I_ALT, 0105355+I_ALT, 0105356+I_ALT, 0105357+I_ALT, | |
| 0105354+I_NPN, 0105355+I_NPN, 0105356+I_NPN, 0105357+I_NPN, /* alternates */ | |
| 0105240+I_ALT, 0105241+I_ALT, 0105242+I_ALT, /* --- */ /* RTE-6/VM VMA */ | |
| /* --- --- --- --- */ | |
| 0105250+I_NPN, 0105251+I_NPN, 0105252+I_NPN, 0105253+I_NPN, | |
| 0105254+I_NPN, 0105255+I_NPN, 0105256+I_NPN, 0105257+I_ALT, | |
| 0105240+I_NPN, 0105241+I_NPN, 0105242+I_NPN, /* RTE-IV EMA */ | |
| /* --- --- --- --- */ | |
| /* --- --- --- --- */ | |
| /* --- --- --- */ 0105257+I_NPN, | |
| 0000000+I_NPN, 0002000+I_NPN, 0010000+I_MRF, 0014000+I_MRF, | |
| 0020000+I_MRF, 0024000+I_MRF, 0030000+I_MRF, 0034000+I_MRF, | |
| 0040000+I_MRF, 0044000+I_MRF, 0050000+I_MRF, 0054000+I_MRF, | |
| 0060000+I_MRF, 0064000+I_MRF, 0070000+I_MRF, 0074000+I_MRF, | |
| 0100000+I_NPN, 0100020+I_ESH, 0100040+I_ESH, 0100060+I_NPN, | |
| 0100100+I_ESH, 0101020+I_ESH, 0101040+I_ESH, 0101100+I_ESH, | |
| 0100200+I_EMR, 0100400+I_EMR, 0104200+I_EMR, 0104400+I_EMR, | |
| 0105000+I_EMR, 0105020+I_EMR, 0105040+I_EMR, 0105060+I_EMR, | |
| 0105100+I_NPN, 0105120+I_NPN, | |
| 0102101+I_NPN, 0103101+I_NPN, 0102201+I_NPC, 0102301+I_NPC, | |
| 0102000+I_IO1, 0102100+I_IO2, 0103100+I_IO2, | |
| 0102200+I_IO1, 0102300+I_IO1, 0102400+I_IO1, 0106400+I_IO1, | |
| 0102500+I_IO1, 0106500+I_IO1, 0102600+I_IO1, 0106600+I_IO1, | |
| 0102700+I_IO1, 0106700+I_IO1, | |
| 0101710+I_NPN, 0101711+I_NPN, 0101712+I_NPN, 0101713+I_NPN, | |
| 0101722+I_NPN, | |
| 0101724+I_EMR, 0101725+I_EMR, 0101726+I_EMR, 0101727+I_NPN, | |
| 0101730+I_NPN, 0101731+I_NPN, | |
| 0105702+I_NPN, 0105703+I_NPN, | |
| 0105704+I_NPN, 0105705+I_NPN, 0105706+I_NPN, 0105707+I_NPN, | |
| 0105710+I_NPN, 0105711+I_NPN, 0105712+I_NPN, 0105713+I_NPN, | |
| 0105714+I_EMR, 0105715+I_EG2, | |
| 0105720+I_NPN, 0105721+I_NPN, 0105722+I_NPN, | |
| 0105724+I_EMR, 0105725+I_EMR, 0105726+I_EMR, 0105727+I_NPN, | |
| 0105730+I_NPN, 0105731+I_NPN, 0105732+I_EMR, 0105733+I_EMR, | |
| 0105734+I_EMR, 0105735+I_EMR, 0105736+I_EMR, 0105737+I_EMR, | |
| 0101740+I_EMR, 0105740+I_EMR, 0101741+I_NPN, 0105741+I_NPN, | |
| 0101742+I_EMR, 0105742+I_EMR, 0105743+I_EMR, | |
| 0101744+I_NPN, 0105744+I_NPN, 0105745+I_EMR, | |
| 0105746+I_EMR, 0101747+I_NPN, 0105747+I_NPN, | |
| 0101750+I_EMR, 0105750+I_EMR, 0101751+I_NPN, 0105751+I_NPN, | |
| 0101752+I_EMR, 0105752+I_EMR, 0105753+I_EMR, | |
| 0101754+I_NPN, 0105754+I_NPN, 0105755+I_EMR, | |
| 0105756+I_EMR, 0101757+I_NPN, 0105757+I_NPN, | |
| 0105760+I_NPN, 0105761+I_NPN, 0105762+I_EMR, 0105763+I_NPN, | |
| 0105764+I_NPN, 0105765+I_EGZ, 0105766+I_EGZ, 0105767+I_NPN, | |
| 0105770+I_NPN, 0105771+I_NPN, 0105772+I_EMR, 0105773+I_EG2, | |
| 0105774+I_EG2, 0105775+I_EG2, 0105776+I_EGZ, 0105777+I_EGZ, | |
| 0000000+I_ASH, /* decode only */ | |
| -1 | |
| }; | |
| /* Decode tables for shift and alter/skip groups */ | |
| static const char *stab[] = { | |
| "ALS", "ARS", "RAL", "RAR", "ALR", "ERA", "ELA", "ALF", | |
| "BLS", "BRS", "RBL", "RBR", "BLR", "ERB", "ELB", "BLF", | |
| "CLA", "CMA", "CCA", "CLB", "CMB", "CCB", | |
| "SEZ", "CLE", "CLE", "CME", "CCE", | |
| "SSA", "SSB", "SLA", "SLB", | |
| "ALS", "ARS", "RAL", "RAR", "ALR", "ERA", "ELA", "ALF", | |
| "BLS", "BRS", "RBL", "RBR", "BLR", "ERB", "ELB", "BLF", | |
| "INA", "INB", "SZA", "SZB", "RSS", | |
| NULL | |
| }; | |
| static const int32 mtab[] = { | |
| 0007700, 0007700, 0007700, 0007700, 0007700, 0007700, 0007700, 0007700, | |
| 0007700, 0007700, 0007700, 0007700, 0007700, 0007700, 0007700, 0007700, | |
| 0007400, 0007400, 0007400, 0007400, 0007400, 0007400, | |
| 0002040, 0002040, 0002300, 0002300, 0002300, | |
| 0006020, 0006020, 0004010, 0004010, | |
| 0006027, 0006027, 0006027, 0006027, 0006027, 0006027, 0006027, 0006027, | |
| 0006027, 0006027, 0006027, 0006027, 0006027, 0006027, 0006027, 0006027, | |
| 0006004, 0006004, 0006002, 0006002, 0002001, | |
| 0 | |
| }; | |
| static const int32 vtab[] = { | |
| 0001000, 0001100, 0001200, 0001300, 0001400, 0001500, 0001600, 0001700, | |
| 0005000, 0005100, 0005200, 0005300, 0005400, 0005500, 0005600, 0005700, | |
| 0002400, 0003000, 0003400, 0006400, 0007000, 0007400, | |
| 0002040, 0000040, 0002100, 0002200, 0002300, | |
| 0002020, 0006020, 0000010, 0004010, | |
| 0000020, 0000021, 0000022, 0000023, 0000024, 0000025, 0000026, 0000027, | |
| 0004020, 0004021, 0004022, 0004023, 0004024, 0004025, 0004026, 0004027, | |
| 0002004, 0006004, 0002002, 0006002, 0002001, | |
| -1 | |
| }; | |
| /* Symbolic decode | |
| Inputs: | |
| *of = output stream | |
| addr = current PC | |
| *val = pointer to data | |
| *uptr = pointer to unit | |
| sw = switches | |
| Outputs: | |
| return = status code | |
| */ | |
| #define FMTASC(x) ((x) < 040)? "<%03o>": "%c", (x) | |
| t_stat fprint_sym (FILE *of, t_addr addr, t_value *val, | |
| UNIT *uptr, int32 sw) | |
| { | |
| int32 cflag, cm, i, j, inst, disp; | |
| uint32 irq; | |
| cflag = (uptr == NULL) || (uptr == &cpu_unit); | |
| inst = val[0]; | |
| if (sw & SWMASK ('A')) { /* ASCII? */ | |
| if (inst > 0377) return SCPE_ARG; | |
| fprintf (of, FMTASC (inst & 0177)); | |
| return SCPE_OK; | |
| } | |
| if (sw & SWMASK ('C')) { /* characters? */ | |
| fprintf (of, FMTASC ((inst >> 8) & 0177)); | |
| fprintf (of, FMTASC (inst & 0177)); | |
| return SCPE_OK; | |
| } | |
| if (!(sw & SWMASK ('M'))) return SCPE_ARG; | |
| /* If we are being called as a result of a VM stop to display the next | |
| instruction to be executed, check to see if an interrupt is pending and not | |
| deferred. If so, then display the interrupt source and the trap cell | |
| instruction as the instruction to be executed, rather than the instruction at | |
| the current PC. | |
| */ | |
| if (sw & SIM_SW_STOP) { /* simulator stop? */ | |
| irq = calc_int (); /* check interrupt */ | |
| if (irq && (!ion_defer || !calc_defer())) { /* pending interrupt and not deferred? */ | |
| addr = irq; /* set display address to trap cell */ | |
| inst = val[0] = ReadIO (irq, SMAP); /* load trap cell instruction */ | |
| val[1] = ReadIO (irq + 1, SMAP); /* might be multi-word */ | |
| val[2] = ReadIO (irq + 2, SMAP); /* although it's unlikely */ | |
| fprintf (of, "IAK %2o: ", irq); /* report acknowledged interrupt */ | |
| } | |
| } | |
| for (i = 0; opc_val[i] >= 0; i++) { /* loop thru ops */ | |
| j = (opc_val[i] >> I_V_FL) & I_M_FL; /* get class */ | |
| if ((opc_val[i] & DMASK) == (inst & masks[j])) { /* match? */ | |
| switch (j) { /* case on class */ | |
| case I_V_NPN: /* no operands */ | |
| fprintf (of, "%s", opcode[i]); /* opcode */ | |
| break; | |
| case I_V_NPC: /* no operands + C */ | |
| fprintf (of, "%s", opcode[i]); | |
| if (inst & I_HC) fprintf (of, " C"); | |
| break; | |
| case I_V_MRF: /* mem ref */ | |
| disp = inst & I_DISP; /* displacement */ | |
| fprintf (of, "%s ", opcode[i]); /* opcode */ | |
| if (inst & I_CP) { /* current page? */ | |
| if (cflag) fprintf (of, "%-o", (addr & I_PAGENO) | disp); | |
| else fprintf (of, "C %-o", disp); | |
| } | |
| else fprintf (of, "%-o", disp); /* page zero */ | |
| if (inst & I_IA) fprintf (of, ",I"); | |
| break; | |
| case I_V_ASH: /* shift, alter-skip */ | |
| cm = FALSE; | |
| for (i = 0; mtab[i] != 0; i++) { | |
| if ((inst & mtab[i]) == vtab[i]) { | |
| inst = inst & ~(vtab[i] & 01777); | |
| if (cm) fprintf (of, ","); | |
| cm = TRUE; | |
| fprintf (of, "%s", stab[i]); | |
| } | |
| } | |
| if (!cm) return SCPE_ARG; /* nothing decoded? */ | |
| break; | |
| case I_V_ESH: /* extended shift */ | |
| disp = inst & 017; /* shift count */ | |
| if (disp == 0) disp = 16; | |
| fprintf (of, "%s %d", opcode[i], disp); | |
| break; | |
| case I_V_EMR: /* extended mem ref */ | |
| fprintf (of, "%s %-o", opcode[i], val[1] & VAMASK); | |
| if (val[1] & I_IA) fprintf (of, ",I"); | |
| return -1; /* extra word */ | |
| case I_V_IO1: /* IOT with H/C */ | |
| fprintf (of, "%s %-o", opcode[i], inst & I_DEVMASK); | |
| if (inst & I_HC) fprintf (of, ",C"); | |
| break; | |
| case I_V_IO2: /* IOT */ | |
| fprintf (of, "%s %-o", opcode[i], inst & I_DEVMASK); | |
| break; | |
| case I_V_EGZ: /* ext grp 1 op + 0 */ | |
| fprintf (of, "%s %-o", opcode[i], val[1] & VAMASK); | |
| if (val[1] & I_IA) fprintf (of, ",I"); | |
| return -2; /* extra words */ | |
| case I_V_EG2: /* ext grp 2 op */ | |
| fprintf (of, "%s %-o", opcode[i], val[1] & VAMASK); | |
| if (val[1] & I_IA) fprintf (of, ",I"); | |
| fprintf (of, " %-o", val[2] & VAMASK); | |
| if (val[2] & I_IA) fprintf (of, ",I"); | |
| return -2; /* extra words */ | |
| case I_V_ALT: /* alternate use instr */ | |
| if ((inst >= 0105354) && | |
| (inst <= 0105357) && /* RTE-6/VM OS range? */ | |
| (addr >= 2) && | |
| (addr <= 077)) /* in trap cell? */ | |
| continue; /* use alternate mnemonic */ | |
| else if ((inst >= 0105240) && /* RTE-6/VM VMA range? */ | |
| (inst <= 0105257) && | |
| (cpu_unit.flags & UNIT_EMA)) /* EMA enabled? */ | |
| continue; /* use EMA mnemonics */ | |
| else | |
| fprintf (of, "%s", opcode[i]); /* print opcode */ | |
| break; | |
| } | |
| return SCPE_OK; | |
| } /* end if */ | |
| } /* end for */ | |
| return SCPE_ARG; | |
| } | |
| /* Get address with indirection | |
| Inputs: | |
| *cptr = pointer to input string | |
| Outputs: | |
| val = address | |
| -1 if error | |
| */ | |
| int32 get_addr (char *cptr) | |
| { | |
| int32 d; | |
| t_stat r; | |
| char gbuf[CBUFSIZE]; | |
| cptr = get_glyph (cptr, gbuf, ','); /* get next field */ | |
| d = get_uint (gbuf, 8, VAMASK, &r); /* construe as addr */ | |
| if (r != SCPE_OK) return -1; | |
| if (*cptr != 0) { /* more? */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* look for indirect */ | |
| if (*cptr != 0) return -1; /* should be done */ | |
| if (strcmp (gbuf, "I")) return -1; /* I? */ | |
| d = d | I_IA; | |
| } | |
| return d; | |
| } | |
| /* Symbolic input | |
| Inputs: | |
| *iptr = pointer to input string | |
| addr = current PC | |
| *uptr = pointer to unit | |
| *val = pointer to output values | |
| sw = switches | |
| Outputs: | |
| status = error status | |
| */ | |
| t_stat parse_sym (char *iptr, t_addr addr, UNIT *uptr, t_value *val, int32 sw) | |
| { | |
| int32 cflag, d, i, j, k, clef, tbits; | |
| t_stat r, ret; | |
| char *cptr, gbuf[CBUFSIZE]; | |
| cflag = (uptr == NULL) || (uptr == &cpu_unit); | |
| while (isspace (*iptr)) iptr++; /* absorb spaces */ | |
| if ((sw & SWMASK ('A')) || ((*iptr == '\'') && iptr++)) { /* ASCII char? */ | |
| if (iptr[0] == 0) return SCPE_ARG; /* must have 1 char */ | |
| val[0] = (t_value) iptr[0] & 0177; | |
| return SCPE_OK; | |
| } | |
| if ((sw & SWMASK ('C')) || ((*iptr == '"') && iptr++)) { /* char string? */ | |
| if (iptr[0] == 0) return SCPE_ARG; /* must have 1 char */ | |
| val[0] = (((t_value) iptr[0] & 0177) << 8) | | |
| ((t_value) iptr[1] & 0177); | |
| return SCPE_OK; | |
| } | |
| ret = SCPE_OK; | |
| cptr = get_glyph (iptr, gbuf, 0); /* get opcode */ | |
| for (i = 0; (opcode[i] != NULL) && (strcmp (opcode[i], gbuf) != 0) ; i++) ; | |
| if (opcode[i]) { /* found opcode? */ | |
| val[0] = opc_val[i] & DMASK; /* get value */ | |
| j = (opc_val[i] >> I_V_FL) & I_M_FL; /* get class */ | |
| switch (j) { /* case on class */ | |
| case I_V_NPN: /* no operand */ | |
| break; | |
| case I_V_NPC: /* no operand + C */ | |
| if (*cptr != 0) { | |
| cptr = get_glyph (cptr, gbuf, 0); | |
| if (strcmp (gbuf, "C")) return SCPE_ARG; | |
| val[0] = val[0] | I_HC; | |
| } | |
| break; | |
| case I_V_MRF: /* mem ref */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get next field */ | |
| if ((k = (strcmp (gbuf, "C") == 0))) { /* C specified? */ | |
| val[0] = val[0] | I_CP; | |
| cptr = get_glyph (cptr, gbuf, 0); | |
| } | |
| else if ((k = (strcmp (gbuf, "Z") == 0))) { /* Z specified? */ | |
| cptr = get_glyph (cptr, gbuf, ','); | |
| } | |
| if ((d = get_addr (gbuf)) < 0) return SCPE_ARG; | |
| if ((d & VAMASK) <= I_DISP) val[0] = val[0] | d; | |
| else if (cflag && !k && (((addr ^ d) & I_PAGENO) == 0)) | |
| val[0] = val[0] | (d & (I_IA | I_DISP)) | I_CP; | |
| else return SCPE_ARG; | |
| break; | |
| case I_V_ESH: /* extended shift */ | |
| cptr = get_glyph (cptr, gbuf, 0); | |
| d = get_uint (gbuf, 10, 16, &r); | |
| if ((r != SCPE_OK) || (d == 0)) return SCPE_ARG; | |
| val[0] = val[0] | (d & 017); | |
| break; | |
| case I_V_EMR: /* extended mem ref */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get next field */ | |
| if ((d = get_addr (gbuf)) < 0) return SCPE_ARG; | |
| val[1] = d; | |
| ret = -1; | |
| break; | |
| case I_V_IO1: /* IOT + optional C */ | |
| cptr = get_glyph (cptr, gbuf, ','); /* get device */ | |
| d = get_uint (gbuf, 8, I_DEVMASK, &r); | |
| if (r != SCPE_OK) return SCPE_ARG; | |
| val[0] = val[0] | d; | |
| if (*cptr != 0) { | |
| cptr = get_glyph (cptr, gbuf, 0); | |
| if (strcmp (gbuf, "C")) return SCPE_ARG; | |
| val[0] = val[0] | I_HC; | |
| } | |
| break; | |
| case I_V_IO2: /* IOT */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get device */ | |
| d = get_uint (gbuf, 8, I_DEVMASK, &r); | |
| if (r != SCPE_OK) return SCPE_ARG; | |
| val[0] = val[0] | d; | |
| break; | |
| case I_V_EGZ: /* ext grp 1 op + 0 */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get next field */ | |
| if ((d = get_addr (gbuf)) < 0) return SCPE_ARG; | |
| val[1] = d; | |
| val[2] = 0; | |
| ret = -2; | |
| break; | |
| case I_V_EG2: /* ext grp 2 op */ | |
| cptr = get_glyph (cptr, gbuf, 0); /* get next field */ | |
| if ((d = get_addr (gbuf)) < 0) return SCPE_ARG; | |
| cptr = get_glyph (cptr, gbuf, 0); /* get next field */ | |
| if ((k = get_addr (gbuf)) < 0) return SCPE_ARG; | |
| val[1] = d; | |
| val[2] = k; | |
| ret = -2; | |
| break; | |
| } /* end case */ | |
| if (*cptr != 0) return SCPE_ARG; /* junk at end? */ | |
| return ret; | |
| } /* end if opcode */ | |
| /* Shift or alter-skip | |
| Each opcode is matched by a mask, specifiying the bits affected, and | |
| the value, specifying the value. As opcodes are processed, the mask | |
| values are used to specify which fields have already been filled in. | |
| The mask has two subfields, the type bits (A/B and A/S), and the field | |
| bits. The type bits, once specified by any instruction, must be | |
| consistent in all other instructions. The mask bits assure that no | |
| field is filled in twice. | |
| Two special cases: | |
| 1. The dual shift field in shift requires checking how much of the | |
| target word has been filled in before assigning the shift value. | |
| To implement this, shifts are listed twice is the decode table. | |
| If the current subopcode is a shift in the first part of the table | |
| (entries 0..15), and CLE has been seen or the first shift field is | |
| filled in, the code forces a mismatch. The glyph will match in | |
| the second part of the table. | |
| 2. CLE processing must be deferred until the instruction can be | |
| classified as shift or alter-skip, since it has two different | |
| bit values in the two classes. To implement this, CLE seen is | |
| recorded as a flag and processed after all other subopcodes. | |
| */ | |
| clef = FALSE; | |
| tbits = 0; | |
| val[0] = 0; | |
| for (cptr = get_glyph (iptr, gbuf, ','); gbuf[0] != 0; | |
| cptr = get_glyph (cptr, gbuf, ',')) { /* loop thru glyphs */ | |
| if (strcmp (gbuf, "CLE") == 0) { /* CLE? */ | |
| if (clef) return SCPE_ARG; /* already seen? */ | |
| clef = TRUE; /* set flag */ | |
| continue; | |
| } | |
| for (i = 0; stab[i] != NULL; i++) { /* find subopcode */ | |
| if ((strcmp (gbuf, stab[i]) == 0) && | |
| ((i >= 16) || (!clef && ((val[0] & 001710) == 0)))) break; | |
| } | |
| if (stab[i] == NULL) return SCPE_ARG; | |
| if (tbits & mtab[i] & (I_AB | I_ASKP) & (vtab[i] ^ val[0])) | |
| return SCPE_ARG; | |
| if (tbits & mtab[i] & ~(I_AB | I_ASKP)) return SCPE_ARG; | |
| tbits = tbits | mtab[i]; /* fill type+mask */ | |
| val[0] = val[0] | vtab[i]; /* fill value */ | |
| } | |
| if (clef) { /* CLE seen? */ | |
| if (val[0] & I_ASKP) { /* alter-skip? */ | |
| if (tbits & 0100) return SCPE_ARG; /* already filled in? */ | |
| else val[0] = val[0] | 0100; | |
| } | |
| else val[0] = val[0] | 040; /* fill in shift */ | |
| } | |
| return ret; | |
| } | |
| /* Format a character into a printable string. | |
| Control characters are translated to readable strings. Printable characters | |
| retain their original form but are enclosed in single quotes. Characters | |
| outside of the ASCII range are represented as escaped octal values. | |
| */ | |
| const char *fmt_char (uint8 ch) | |
| { | |
| static const char *const ctl [] = { "NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL", | |
| "BS", "HT", "LF", "VT", "FF", "CR", "SO", "SI", | |
| "DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB", | |
| "CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US" }; | |
| static char rep [5]; | |
| if (ch <= '\037') /* ASCII control character? */ | |
| return ctl [ch]; /* return string representation */ | |
| else if (ch == '\177') /* ASCII delete? */ | |
| return "DEL"; /* return string representation */ | |
| else if (ch > '\177') { /* beyond printable range? */ | |
| sprintf (rep, "\\%03o", ch); /* format value */ | |
| return rep; /* return escaped octal code */ | |
| } | |
| else { /* printable character */ | |
| rep [0] = '\''; /* form string */ | |
| rep [1] = ch; /* containing character */ | |
| rep [2] = '\''; | |
| rep [3] = '\0'; | |
| return rep; /* return quoted character */ | |
| } | |
| } | |
| /* Set select code */ | |
| t_stat hp_setsc (UNIT *uptr, int32 num, char *cptr, void *desc) | |
| { | |
| DEVICE *dptr = (DEVICE *) desc; | |
| DIB *dibptr; | |
| int32 i, newdev; | |
| t_stat r; | |
| if (cptr == NULL) | |
| return SCPE_ARG; | |
| if ((desc == NULL) || (num > 1)) | |
| return SCPE_IERR; | |
| dibptr = (DIB *) dptr->ctxt; | |
| if (dibptr == NULL) | |
| return SCPE_IERR; | |
| newdev = get_uint (cptr, 8, I_DEVMASK - num, &r); | |
| if (r != SCPE_OK) | |
| return r; | |
| if (newdev < VARDEV) | |
| return SCPE_ARG; | |
| for (i = 0; i <= num; i++, dibptr++) | |
| dibptr->select_code = newdev + i; | |
| return SCPE_OK; | |
| } | |
| /* Show select code */ | |
| t_stat hp_showsc (FILE *st, UNIT *uptr, int32 num, void *desc) | |
| { | |
| DEVICE *dptr = (DEVICE *) desc; | |
| DIB *dibptr; | |
| int32 i; | |
| if ((desc == NULL) || (num > 1)) | |
| return SCPE_IERR; | |
| dibptr = (DIB *) dptr->ctxt; | |
| if (dibptr == NULL) | |
| return SCPE_IERR; | |
| fprintf (st, "select code=%o", dibptr->select_code); | |
| for (i = 1; i <= num; i++) | |
| fprintf (st, "/%o", dibptr->select_code + i); | |
| return SCPE_OK; | |
| } | |
| /* Set device number */ | |
| t_stat hp_setdev (UNIT *uptr, int32 num, char *cptr, void *desc) | |
| { | |
| return hp_setsc (uptr, num, cptr, desc); | |
| } | |
| /* Show device number */ | |
| t_stat hp_showdev (FILE *st, UNIT *uptr, int32 num, void *desc) | |
| { | |
| t_stat result; | |
| result = hp_showsc (st, uptr, num, desc); | |
| if (result == SCPE_OK) | |
| fputc ('\n', st); | |
| return result; | |
| } |