Posted By
Csabo
on 2018-01-31
16:16:02
|  Re: SD2IEC Issue
Hi Marc,
Have you eliminated the possibility that your Plus/4's RAM might be faulty? If not, I have a little program which will check the memory. (I wrote it for Baz a while back when he had a somewhat similar issue.) It would take a few minutes of typing, I guess; if you're up for it, here it is:
MONITOR
>600 78 8D 3F FF A9 55 8D 19
>608 FF A0 00 AD 5C 06 20 45
>610 06 AD 5B 06 20 45 06 A9
>618 FF 20 59 06 A9 AA 20 59
>620 06 A9 55 20 59 06 A9 00
>628 20 59 06 EE 5B 06 D0 03
>630 EE 5C 06 AD 5B 06 8D 63
>638 06 AD 5C 06 8D 64 06 C9
>640 FD D0 C6 F0 28 48 4A 4A
>648 4A 4A 20 50 06 68 29 0F
>650 AA BD 74 06 99 00 0C C8
>658 60 48 8D 00 08 A9 C9 8A
>660 98 68 CD 00 08 D0 01 60
>668 A9 32 8D 19 FF 8D 3E FF
>670 58 4C 45 F4 30 31 32 33
>678 34 35 36 37 38 39 01 02
>680 03 04 05 06
G600
When you run it, it will check pretty much the entire RAM. If any problems are found, the offending address will be left on screen and the border will turn red (otherwise it will be green). Maybe it's worth a shot.
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