I've looked at a few reports on the error codes that you have listed and it looks as if they all refer to the dual processors. As yours is an old Option 51, the problem might be due to your floppy disk causing them. Perhaps you have a spare floppy disk that you can try out?.
All the best
Firebird Scrambler
Meridian 1 / Succession and BCM / Norstar Programmer in the UK
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