7 Apr
2010
7 Apr
'10
10:01 a.m.
I may be asked to handle some Terak 8500-series "variable density"
floppies. The documentation isn't very specific about these and
since I don't have them in hand, I'm guessing that they're really
just FM+MFM and not actually zoned bit density floppies.
Do I assume correctly?
Thanks all,
Chuck
12:56 p.m.
On 7 Apr 2010 at 13:35, John Foust wrote:
Yes, that's right. RX02.
Is the photo of the disk controller board on bitsavers:
http://bitsavers.informatik.uni-
stuttgart.de/pdf/terak/PCBs/8510_FLP_T.jpg
of the variable-density or the single-density variety? I can't see
how it could possibly be standard "funny MFM" RX02, however with the
NEC 765 controller onboard. It would seem that a real RX02 format
board would involve quite a bit more logic to get the DEC RX02 format
right.
Thanks,
Chuck
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