Spontaneous numlock

[ab1jx]

Anybody run this hex code through a disassembler?
http://plit.de/asem-51/dis51.html

Well ok, it disassembles to 95 k bytes, too much to post here. Try it. Just a sample:

Code:

L0358: MOV A, #82h ADD A, 37h MOV R0, A MOV A, @R0 MOV R7, A CLR C SUBB A, #90h JC L0359 LJMP L0360 L0359: MOV B, #2h MOV A, R7 MUL AB ADD A, #15h MOV DPL, A MOV A, B ADDC A, #8h MOV DPH, A CLR A MOVC A, @A+DPTR MOV 65h, A MOV B, #2h MOV A, R7 MUL AB ADD A, #16h MOV DPL, A MOV A, B ADDC A, #8h MOV DPH, A CLR A MOVC A, @A+DPTR MOV 64h, A MOV A, 65h JNZ L0361 LJMP L0360 L0361: LCALL L0362 MOV A, 65h CJNE A, #4h, L0363 JNB 0Ah, L0364 SETB 26h SJMP L0363 L0364: CLR 26h L0363: JB 0Ah, L0365 LJMP L0366 L0365: MOV A, 65h CJNE A, #2h, L0419 MOV A, 64h CJNE A, #8h, L0420 MOV R0, #15h MOV @R0, #1h L0420: LJMP L0368 L0419: MOV A, 65h CJNE A, #1h, L0421 LJMP L0422 L0421: MOV A, 65h CJNE A, #3h, L0423 LJMP L0424 L0423: MOV A, 65h CJNE A, #5h, L0425 LJMP L0426 L0425: MOV A, 65h XRL A, #6h JNZ L0427 JNB 26h, L0428 LCALL L0394 MOV DPH, A CLR A MOVC A, @A+DPTR MOV R5, A CJNE A, #0FEh, L0429 JNB 24h, L0430 CLR 24h RET L0430: SETB 24h RET L0429: LJMP L0431 L0428: LCALL L0396 LJMP L0431 L0427: MOV A, 65h XRL A, #7h JZ L0432 LJMP L0433 L0432: JNB 26h, L0447 LCALL L0398 MOV DPH, A CLR A MOVC A, @A+DPTR MOV R5, A LJMP L0431 L0447: MOV R0, #15h MOV A, @R0 JNZ L0448 LJMP L0449 L0448: LCALL L0399 CJNE A, #43h, L0450 MOV R7, #1h SJMP L0451 L0450: MOV R7, #0h L0451: MOV A, R7 JZ L0452 CLR A MOV R0, #14h MOV @R0, A MOV R0, #17h MOV A, @R0 MOV R7, A JNB ACC.0, L0453 LCALL L0454 ANL A, #0FEh MOV @R0, A MOV 12h, #4h SJMP L0455 L0453: LCALL L0467 ORL A, #1h MOV @R0, A MOV 12h, #6h L0455: SETB 0C0h SETB 0C1h LCALL L0456 LCALL L0138 L0452: LCALL L0399 CJNE A, #44h, L0457 MOV R7, #1h SJMP L0458 L0457: MOV R7, #0h L0458: MOV A, R7 JZ L0459 MOV R0, #14h MOV @R0, #1h MOV R0, #17h MOV A, @R0 MOV R7, A JNB ACC.1, L0460 LCALL L0454 ANL A, #0FDh MOV @R0, A MOV 12h, #4h SJMP L0461 L0460: LCALL L0467 ORL A, #2h MOV @R0, A MOV 12h, #6h L0461: SETB 0C0h SETB 0C1h LCALL L0456 LCALL L0138 L0459: LCALL L0399 CJNE A, #45h, L0462 MOV R7, #1h SJMP L0463 L0462: MOV R7, #0h L0463: MOV A, R7 JNZ L0464 LJMP L0360 L0464: MOV R0, #14h MOV @R0, #2h MOV R0, #17h MOV A, @R0 MOV R7, A JNB ACC.2, L0465 LCALL L0454 ANL A, #0FBh MOV @R0, A MOV 12h, #4h SJMP L0466 L0465: LCALL L0467 ORL A, #4h MOV @R0, A MOV 12h, #6h L0466: SETB 0C0h SETB 0C1h LCALL L0136 MOV R5, #1h MOV R7, #0A0h LCALL L0137 MOV R5, #1h CLR A MOV R7, A LCALL L0137 MOV R0, #17h MOV A, @R0 MOV R7, A MOV R5, #1h LCALL L0137 LJMP L0138 L0449: LCALL L0399 MOV R5, A LJMP L0431 L0433: MOV A, 65h XRL A, #0Ah JNZ L0434 JNB 26h, L0435 LCALL L0402 MOV DPH, A CLR A MOVC A, @A+DPTR MOV R5, A LJMP L0431 L0435: MOV A, 64h ADD A, ACC JNB 1Ah, L0436 LCALL L0437 SJMP L0438 L0436: ADD A, #57h MOV DPL, A CLR A ADDC A, #9h L0438: MOV DPH, A CLR A MOVC A, @A+DPTR MOV R5, A LJMP L0431 L0434: MOV A, 65h XRL A, #9h JNZ L0439 JNB 26h, L0440 MOV C, 0Ah LJMP L0441 L0440: SJMP L0422 L0439: MOV A, 65h XRL A, #0Ch JZ L0442 LJMP L0360 L0442: JNB 26h, L0443 L0444: MOV A, 0E4h JNB ACC.3, L0444 MOV A, 0E4h ANL A, #3h JNZ L0444 LCALL L0406 LCALL L0143 L0445: MOV A, 0E4h JNB ACC.3, L0445 MOV A, 0E4h ANL A, #3h JNZ L0445 LCALL L0404 LJMP L0446 L0443: SJMP L0422 L0366: MOV A, 65h CJNE A, #2h, L0367 MOV A, 64h CJNE A, #8h, L0368 CLR A MOV R0, #15h MOV @R0, A L0368: LCALL L0369 LJMP L0370 L0367: MOV A, 65h CJNE A, #1h, L0372 L0422: LCALL L0369 LJMP L0373 L0372: MOV A, 65h CJNE A, #3h, L0383 L0424: LCALL L0369 LJMP L0384 L0383: MOV A, 65h CJNE A, #5h, L0388 L0426: LCALL L0369 LJMP L0389 L0388: MOV A, 65h XRL A, #6h JNZ L0393 LCALL L0394 LCALL L0395 LCALL L0374 LCALL L0396 L0431: MOV C, 0Ah CLR A RLC A MOV R7, A LJMP L0373 L0393: MOV A, 65h XRL A, #7h JNZ L0397 LCALL L0398 LCALL L0395 LCALL L0374 LCALL L0399 LCALL L0400 SJMP L0373 L0397: MOV A, 65h XRL A, #0Ah JNZ L0401 LCALL L0402 LCALL L0395 LCALL L0374 MOV A, 64h ADD A, ACC ADD A, #57h MOV DPL, A CLR A ADDC A, #9h LCALL L0395 SJMP L0373 L0401: MOV A, 65h CJNE A, #9h, L0403 LCALL L0369 LCALL L0374 MOV C, 0Ah CLR A L0441: RLC A MOV R7, A MOV R5, #66h L0373: LJMP L0374 L0403: MOV A, 65h XRL A, #0Ch JNZ L0360 MOV C, 0Ah RLC A MOV R7, A MOV R5, 64h LCALL L0374 LCALL L0404 LCALL L0143 L0405: MOV A, 0E4h JNB ACC.3, L0405 MOV A, 0E4h ANL A, #3h JNZ L0405 LCALL L0406 L0446: LCALL L0143 L0360: RET L0456: LCALL L0136 MOV R5, #1h MOV R7, #0A0h LCALL L0137 MOV R5, #1h CLR A MOV R7, A LCALL L0137 MOV R0, #17h MOV A, @R0 MOV R7, A MOV R5, #1h LCALL L0137 RET L0406: MOV C, 0Ah CLR A RLC A MOV R7, A MOV R5, #8h LCALL L0370 RET L0404: MOV C, 0Ah CLR A RLC A MOV R7, A MOV R5, #13h LCALL L0374 RET

8051 instruction set summary http://ww1.microchip.com/downloads/en/De...oc0509.pdf