19 Jul
2016
19 Jul
'16
11:22 a.m.
On 2016-07-19 2:25 PM, tony duell wrote:
Yes I saw your schematic, it does not seem too big of a challenge, but
on the other hand it may be bank switched just because it supports both
diskette drives and both halve may not be required to support only 9895,
but without a dump that is only speculation.
Paul.
There was only
ever support for 8" diskette drives, and to support 9895
you need the second version of the Diskette ROM which appears to be very
rare. I t sure would be nice if someone who has one of these ROMs would
dump the contents or loan it to someone who could dump it, so that we
might be able to clone the ROM module.
It's not totally trivial. The later
version module is so large that part of the
ROM is bank-switched. So you would have to make sure you copied the
entire ROM and the copied the bank-switching circuitry in the cloned
module.
-tony