HP-85A tape drive conversion

[Jay West]

Rik wrote...
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But this type of drive has issues about the running off the tape every once
in a while.
Somehow the tape end detection not always detects the end of a DC2000 etc.. 
It suspect the tape controller hardware, but I didn't researched it so it's
for the best an educated guess.
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A quick read through the assembler manual for the 85 throws up all kinds of
cautions specifically about assembly code causing issues with the tape
coming off the spool, seemed a known issue. Just saying - it may be a
software issue not a hardware issue.

J