1: / tape boot program to load and transfer 2: / to a 'tp' entry 3: 4: / entry is made by jsr pc,*$0 5: / so return can be rts pc 6: / jsr pc,(r5) is putc 7: / jsr pc,2(r5) is getc 8: / jsr pc,4(r5) is mesg 9: 10: core = 24. 11: .mt. = 1 12: .. = [core*2048.]-512. 13: start: 14: mov $..,sp 15: mov $name,r4 16: mov sp,r1 17: cmp pc,r1 18: bhis 2f 19: clr r0 20: cmp (r0),$407 21: bne 1f 22: mov $20,r0 23: 1: 24: mov (r0)+,(r1)+ 25: cmp r1,$end 26: blo 1b 27: jmp (sp) 28: 29: 2: 30: jsr pc,rew 31: mov $tvec,r5 32: mov $'=,r0 33: jsr pc,(r5) 34: 2: 35: mov r4,r1 36: 1: 37: jsr pc,2(r5) 38: cmp r0,$'\n 39: beq 1f 40: cmp r0,$'@ 41: beq 2b 42: movb r0,(r1)+ 43: cmp r0,$'# 44: bne 1b 45: sub $2,r1 46: cmp r1,r4 47: blo 2b 48: br 1b 49: 1: 50: clrb (r1) 51: cmp r1,r4 52: blos start 53: mov $1,tapa 54: mov $-6144.,wc 55: jsr pc,taper 56: clr r1 57: 1: 58: mov r1,r2 59: mov r4,r0 60: 2: 61: cmpb (r0)+,(r1) 62: bne 2f 63: tstb (r1)+ 64: bne 2b 65: br 1f 66: 2: 67: mov r2,r1 68: add $64.,r1 69: cmp r1,$12288. 70: blo 1b 71: jsr pc,rew 72: br start 73: 1: 74: mov 44.(r2),tapa 75: mov 38.(r2),r0 76: inc r0 77: clc 78: ror r0 79: neg r0 80: mov r0,wc 81: clr r0 82: 1: 83: clr (r0)+ 84: cmp r0,sp 85: blo 1b 86: jsr pc,taper 87: jsr pc,rew 88: clr r0 89: cmp (r0),$407 / unix a.out? 90: bne 2f 91: 1: 92: mov 20(r0),(r0)+ 93: cmp r0,sp 94: blo 1b 95: 2: 96: jsr pc,*$0 97: br start 98: 99: .if .mt. 100: mts = 172520 101: mtc = 172522 102: mtbrc = 172524 103: mtcma = 172526 104: 105: taper: 106: clr mtma 107: cmp mtapa,tapa 108: beq 1f 109: bhi 2f 110: jsr pc,rrec 111: br taper 112: 2: 113: jsr pc,rew 114: br taper 115: 1: 116: mov wc,r1 117: 1: 118: jsr pc,rrec 119: add $256.,r1 120: bmi 1b 121: rts pc 122: 123: rrec: 124: bit $2,*$mts 125: bne rrec 126: tstb *$mtc 127: bge rrec 128: mov $-512.,*$mtbrc 129: mov mtma,*$mtcma 130: mov $60003,*$mtc 131: 1: 132: tstb *$mtc 133: bge 1b 134: tst *$mtc 135: bge 1f 136: mov $-1,*$mtbrc 137: mov $60013,*$mtc 138: br rrec 139: 1: 140: add $512.,mtma 141: inc mtapa 142: rts pc 143: 144: rew: 145: mov $60017,*$mtc 146: clr mtapa 147: rts pc 148: .endif 149: 150: .if .mt.-1 151: tcdt = 177350 152: tccm = 177342 153: taper: 154: mov $tcdt,r0 155: mov $tccm,r1 156: for: 157: mov $3,(r1) / rbn for 158: 1: 159: tstb (r1) 160: bge 1b 161: tst (r1) 162: blt rev 163: cmp tapa,(r0) 164: beq rd 165: bgt for 166: 167: rev: 168: mov $4003,(r1) / rbn bac 169: 1: 170: tstb (r1) 171: bge 1b 172: tst (r1) 173: blt for 174: mov (r0),r2 175: add $5,r2 176: cmp tapa,r2 177: blt rev 178: br for 179: 180: rd: 181: clr -(r0) / bus addr 182: mov wc,-(r0) / wc 183: mov $5,-(r0) / read 184: 1: 185: tstb (r1) 186: bge 1b 187: tst (r1) 188: blt taper 189: rts pc 190: 191: rew: 192: mov $4003,tccm 193: rts pc 194: .endif 195: 196: tvec: 197: br putc 198: br getc 199: br mesg 200: 201: tks = 177560 202: tkb = 177562 203: getc: 204: mov $tks,r0 205: inc (r0) 206: 1: 207: tstb (r0) 208: bge 1b 209: mov tkb,r0 210: bic $!177,r0 211: cmp r0,$'A 212: blo 1f 213: cmp r0,$'Z 214: bhi 1f 215: add $40,r0 216: 1: 217: cmp r0,$'\r 218: bne putc 219: mov $'\n,r0 220: 221: tps = 177564 222: tpb = 177566 223: putc: 224: tstb tps 225: bge putc 226: cmp r0,$'\n 227: bne 1f 228: mov $'\r,r0 229: jsr pc,(r5) 230: mov $'\n+200,r0 231: jsr pc,(r5) 232: clr r0 233: jsr pc,(r5) 234: mov $'\n,r0 235: rts pc 236: 1: 237: mov r0,tpb 238: rts pc 239: 240: mesg: 241: movb *(sp),r0 242: beq 1f 243: jsr pc,(r5) 244: inc (sp) 245: br mesg 246: 1: 247: add $2,(sp) 248: bic $1,(sp) 249: rts pc 250: 251: end: 252: tapa: .=.+2 253: mtapa: .=.+2 254: mtma: .=.+2 255: wc: .=.+2 256: name: .=.+32.
Defined functions
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