From: Anders Carlsson (anders.carlsson_at_sfks.se)
Date: 2008-09-08 19:00:33
Hello all,
I found it astonishing if Memory-Write would not work on a 8250,
and it took over 25 years to figure it out.
Thus when I came home this evening, I brought out a 8250LP and a
CBM 610. In theory I could test with a full-height 8250 and/or a
8032-SK or even a 3032, but I don't think the results would be
that more different, just more computers to lug around for me.
Anyway, see the linked photo which is a bit blurry but displays
both the computer, the drive and my 28" TV with this Basic program:
10 open1,8,15
15 rem print#1,"i0"
17 fori=0to15
20 print#1,"m-w"chr$(i)chr$(18)chr$(1)chr$(i+72)
22 next
23 fori=0to15:print#1,"m-r"chr$(i)chr$(18)chr$(1)
25 get#1,a$:printasc(a$+chr$(0));
27 next
30 close1
ready.
run
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
ready.
20print#1,"m-w"chr$(i)chr$(18)chr$(1)chr$(i+64)
run
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
ready.
http://www.geting.se/viewimage.php?image=123329-8250-test.jpg
Well, it looks like at least my 8250LP has the correct ROMs. Do you
think it is important for me to go down to the basement and pick up
a full-height 8250 to cross check? Can the type of PET/CBM computer
make a difference?
If this program does not work on Ruud's 8296D, it sounds like his
drive has some fault or a different ROM version. After all, from what
I remember a 8296D effectively contains a 8250LP - both boards and
drives being the same type, just the connecting cable twisted around.
Best regards
--
Anders Carlsson
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