/* emdev.h, Jim Wilcoxson, April 17, 2005 Device handlers for pio instructions. Use devnull as a template for new handlers. NOTES: OCP instructions never skip SKS instructions skip on specified conditions INA/OTA instructions skip if they succeed (data was read/written) Device numbers: '01 = paper tape reader '02 = paper tape punch '03 = 1st MPC (line printer/card reader/card punch) '04 = SOC board (system console/user terminal) '05 = 2nd MPC (line printer/card reader/card punch) '06 = card punch? (RTOS User Guide, A-1) / IPC (Engr Handbook p.101) '07 = PNC '12 = diskette '13 = 2nd magtape controller '14 = 1st magtape controller '20 = control panel / real-time clock '21 = 1st 4002 disk controller '22 = obsolete: fixed head disk '23 = obsolete: 30MB disk '24 = tag monitor (tmain.pma) / writable control store '25 = obsolete: moving head disk '26 = 1st disk controller '27 = 2nd disk controller '30-32 = BPIOC #1-3 (RTOS User Guide, A-1) '33 = 1st Versatec (verdim) '34 = 2nd Versatec '35 = 4th AMLC '36-37 = ELFBUS #1 & 2 '40 = A/D converter type 6000 '41 = digital input type 6020 '42 = digital input #2 '43 = digital output type 6040 '44 = digital output #2 '45 = D/A converter type 6060 (analog output) '50 = 1st HSSMLC (cs/slcdim.pma) '51 = 2nd HSSMLC '52 = 3rd AMLC '53 = 2nd AMLC '54 = 1st AMLC '55 = MACI autocall unit '56 = old SMLC (RTOS User Guide, A-1) '60-67 = reserved for user devices '70-'73 = Megatek graphics terminals Devices emulated by Primos in ks/ptrap.ftn: '04 = console, '01 = paper tape reader, '02 = paper tape punch, '20 = control panel */ #include #include void devnull (short class, short func, short device) { switch (class) { case 0: fprintf(stderr," OCP '%02o%02o\n", func, device); if (func == 0) { ; } else { fprintf(stderr," unimplemented OCP device '%02o function\n", device); exit(1); } break; case 1: fprintf(stderr," SKS '%02o%02o\n", func, device); if (func == 0) RPL++; /* assume it's always ready */ else { fprintf(stderr," unimplemented SKS device '%02o function\n", device); exit(1); } break; case 2: fprintf(stderr," INA '%02o%02o\n", func, device); if (func == 0) { ; } else { fprintf(stderr," unimplemented INA device '%02o function\n", device); exit(1); } break; case 3: fprintf(stderr," OTA '%02o%02o\n", func, device); if (func == 0 | func == 1) { RPL++; /* OTA '0004 always works on Unix */ } else { fprintf(stderr," unimplemented OTA device '%02o function\n", device); exit(1); } break; } } /* Device '4: system console OCP '0004 = initialize for input only, echoplex, 110 baud, 8-bit, no parity OCP '0104 = same, but for output only OCP '1004 = Full duplex; software must echo OCP '1204 = Prime normal, independent xmit and recv w/echoplex OCP '1304 = Self test mode (internally connects transmitter to receiver) OCP '1704 = same as above, but clears interrupt masks and dma/c enables */ void devasr (short class, short func, short device) { static int ttydev=-1; unsigned char ch; int ttyflags, newflags; int n; if (ttydev < 0) { ttydev = open("/dev/tty", O_RDWR, 0); if (ttydev < 0) { perror(" error opening /dev/tty"); exit(1); } } switch (class) { case 0: fprintf(stderr," OCP '%02o%02o\n", func, device); break; case 1: fprintf(stderr," SKS '%02o%02o\n", func, device); if (func <= 7) RPL++; /* assume it's always ready */ else { fprintf(stderr," unimplemented SKS '04 function\n"); exit(1); } break; case 2: fprintf(stderr," INA '%02o%02o\n", func, device); if (func == 0 || func == 010) { if (fcntl(ttydev, F_GETFL, ttyflags) == -1) { perror(" unable to get tty flags"); exit(1); } if (get16(RPL) == 03776) /* JMP *-1 -> blocking read */ newflags = ttyflags & ~O_NONBLOCK; else newflags = ttyflags | O_NONBLOCK; if (fcntl(ttydev, F_SETFL, newflags) == -1) { perror(" unable to set tty flags"); exit(1); } n = read(ttydev, &ch, 1); if (n < 0) { if (errno != EAGAIN) { perror(" error reading from tty"); exit(1); } } else if (n == 1) { if (func >= 010) crs[A] = 0; crs[A] = crs[A] | ch | 0x80; RPL++; } else if (n != 0) { fprintf(stderr," unexpected error reading from tty, n=%d", n); exit(1); } } else if (func == 011) { /* read device id? */ crs[A] = 4; RPL++; } else if (func == 012) { /* read control word */ crs[A] = 04110; RPL++; } else { fprintf(stderr," unimplemented INA '04 function\n"); exit(1); } break; case 3: fprintf(stderr," OTA '%02o%02o\n", func, device); if (func == 0) { fprintf(stderr," char to write=%o\n", crs[A]); putchar(crs[A] & 0x7f); fflush(stdout); RPL++; /* OTA '0004 always works on Unix */ } else if (func == 1) { /* write control word */ RPL++; } else { fprintf(stderr," unimplemented OTA '04 function\n"); exit(1); } break; } } /* Device '14 - magtape controller #1 */ void devmt (short class, short func, short device) { switch (class) { case 0: fprintf(stderr," OCP '%02o%02o\n", func, device); break; case 1: fprintf(stderr," SKS '%02o%02o\n", func, device); break; case 2: fprintf(stderr," INA '%02o%02o\n", func, device); if (get16(RPL) == 03776) { /* JMP *-1 -> blocking read */ fprintf(stderr," Device not supported, so I/O hangs\n"); exit(1); } break; case 3: fprintf(stderr," OTA '%02o%02o\n", func, device); if (get16(RPL) == 03776) { /* JMP *-1 -> blocking read */ fprintf(stderr," Device not supported, so I/O hangs\n"); exit(1); } break; } } /* Device '20: control panel switches and lights OTA '1720 = write to lights (sets CP fetch address) INA '1420 = read location from CP ROM (not implemented, used to boot) INA '1620 = read control panel switches */ void devcp (short class, short func, short device) { switch (class) { case 0: fprintf(stderr," OCP '%02o%02o\n", func, device); fprintf(stderr," unimplemented OCP device '%02o function\n", device); exit(1); break; case 1: fprintf(stderr," SKS '%02o%02o\n", func, device); fprintf(stderr," unimplemented SKS device '%02o function\n", device); exit(1); break; case 2: fprintf(stderr," INA '%02o%02o\n", func, device); if (func == 016) { crs[A] = 014114; } else { fprintf(stderr," unimplemented INA device '%02o function\n", device); exit(1); } break; case 3: fprintf(stderr," OTA '%02o%02o\n", func, device); if (func == 017) { /* write lights */ RPL++; } else { fprintf(stderr," unimplemented OTA device '%02o function\n", device); exit(1); } break; } } /* disk controller at '26 and '27 NOTES: - in the DSEL disk channel program command, unit number is a 4-bit field, with these binary values: 0001 = unit 0 (pdev 460/461) 0010 = unit 1 (pdev 462/463) 0100 = unit 2 (pdev 464/465) 1000 = unit 3 (pdev 466/467) OCP '1626 = reset interrupt OCP '1726 = reset controller INA '1126 = input ID, don't clear A first, fails if no controller INA '1726 = read status (or something), fails if controller busy OTA '1726 = load OAR (Order Address Register), ie, run channel program, address is in A */ void devdisk (short class, short func, short device) { unsigned short m; unsigned short oar; unsigned short status; /* actual status */ unsigned short teststatus; /* status for order testing */ unsigned short memaddr; unsigned short order; short halt; short unit; short head, track, rec, recsize, nwords; unsigned short dmachan, dmanch, dmaaddr; short dmanw; char ordertext[8]; char devfile[8]; char devopened[8]; /* device file that is open on devfd */ static int devfd=-1; /* device file descriptor */ int theads, spt, phyra; switch (class) { case 0: fprintf(stderr," OCP '%2o%2o\n", func, device); break; case 1: fprintf(stderr," SKS '%2o%2o\n", func, device); break; case 2: fprintf(stderr," INA '%2o%2o\n", func, device); if (func == 01) /* read device id, clear A first */ crs[A] = device; else if (func == 011) /* read device id, don't clear A */ crs[A] |= device; else if (func == 017) /* read status */ crs[A] = 0100000; RPL++; break; case 3: fprintf(stderr," OTA '%02o%02o\n", func, device); if (func == 017) { /* set OAR (order address register) */ oar = crs[A]; halt = 0; status = 0100000; unit = -1; while (!halt) { order = mem[oar]>>12; fprintf(stderr,"\n %o: %o %o %o\n", oar, mem[oar], mem[oar+1], mem[oar+2]); if (mem[oar] & 04000) { /* "execute if ..." */ if (order == 2 || order == 5 || order == 6) oar += 3; else oar += 2; continue; } switch (order) { case 0: /* DHLT = Halt */ halt = 1; fprintf(stderr," channel program halt at '%o\n", oar); break; case 2: /* SFORM = Format */ case 5: /* SREAD = Read */ case 6: /* SWRITE = Write */ recsize = mem[oar] & 017; track = mem[oar+1] & 01777; rec = mem[oar+2] >> 8; /* # records for format, rec # for R/W */ head = mem[oar+2] & 077; if (order == 2) strcpy(ordertext,"Format"); else if (order == 5) strcpy(ordertext,"Read"); else if (order == 6) strcpy(ordertext,"Write"); fprintf(stderr," %s, head=%d, track=%d, rec=%d, recsize=%d\n", ordertext, head, track, rec, recsize); dmanw = get16(dmachan); dmanw = -(dmanw>>4); dmaaddr = get16(dmachan+1); fprintf(stderr, " DMA channels: nch-1=%d, ['%o]='%o, ['%o]='%o, nwords=%d\n", dmanch, dmachan, get16(dmachan), dmachan+1, dmaaddr, dmanw); if (devfd == -1) { fprintf(stderr," Unit not selected or not ready\n"); status = 0100001; } else if (order == 2) fprintf(stderr," Format order not implemented\n"); else if (order == 5) { /* translate head/track/sector to drive record address */ theads = 40; /* should get total heads from a config file */ spt = 9; /* and sectors per track too */ phyra = (track*theads*spt) + head*9 + rec; fprintf(stderr, " phyra=%d, byte offset=%d\n", phyra, phyra*2080); if (lseek(devfd, phyra*2080, SEEK_SET) == -1) { perror("Unable to seek drive file"); exit(1); } if (read(devfd, mem+dmaaddr, dmanw*2) != dmanw*2) { perror("Unable to read drive file"); exit(1); } put16(0,dmachan); m = get16(dmachan+1); m += dmanw; put16(m,dmachan+1); } else if (order == 6) fprintf(stderr," Write order not implemented\n"); oar += 3; break; case 3: /* SSEEK = Seek */ track = mem[oar+1] & 01777; fprintf(stderr," seek track %d, restore=%d, clear=%d\n", track, (mem[oar+1] & 0100000) != 0, (mem[oar+1] & 040000) != 0); oar += 2; break; case 4: /* DSEL = Select unit */ unit = (mem[oar+1] & 017) >> 1; /* unit = 0/1/2/4 */ if (unit == 4) unit = 3; /* unit = 0/1/2/3 */ snprintf(devfile,sizeof(devfile),"dev%ou%d", device, unit); fprintf(stderr," select unit %d, filename %s\n", unit, devfile); if (strcmp(devfile,devopened) != 0 || devfd == -1) { if (devfd != -1) { close(devfd); devfd = -1; } if ((devfd = open(devfile, O_RDONLY, 0)) == -1) status = 0100001; /* not ready */ else strcpy(devopened, devfile); } oar += 2; break; case 7: /* DSTALL = Stall */ fprintf(stderr," stall\n"); oar += 2; break; case 9: /* DSTAT = Store status to memory */ memaddr = mem[oar+1]; fprintf(stderr, " store status='%o to '%o\n", status, memaddr); mem[memaddr] = status; oar += 2; break; case 11: /* DOAR = Store OAR to memory (2 words) */ memaddr = mem[oar+1]; fprintf(stderr, " store OAR='%o to '%o\n", oar, memaddr); mem[memaddr] = oar; oar += 2; break; case 13: /* SDMA = select DMA channel(s) to use */ dmanch = mem[oar] & 017; dmachan = mem[oar+1]; fprintf(stderr, " set DMA channels, nch-1=%d, channel='%o\n", dmanch, dmachan); oar += 2; break; case 14: /* DINT = generate interrupt through vector address */ memaddr = mem[oar+1]; fprintf(stderr, " interrupt through '%o\n", memaddr); exit(1); oar += 2; break; case 15: /* DTRAN = channel program jump */ oar = mem[oar+1]; fprintf(stderr, " jump to '%o\n", oar); break; default: fprintf(stderr, " unrecognized channel order = %d\n", order); exit(1); } } RPL++; } else { fprintf(stderr," unimplemented OTA device '%02o function\n", device); exit(1); } break; } }