On 11/11/10 9:53 AM, Richard wrote:
but there was
a local source ($100 minimum though)
Ouch.
The shells will be used for another project.
I've started designing a board to do Diablo 31 disk simulation
and experimental to standard ethernet conversion for the Alto,
(along with a bunch of other useful things).
It will bolt onto the back of the first drive, and get power from
the +5v terminator power pin.
A high density 68 pin cable replaces the cable from the drive
interface board to the first drive, and also brings across the
tx,rx, and collision signals from the ethernet board.
The new board can either source or sink the command lines on the
drive bus, so it can also be used as a tester or drive reader/writer
so it will be possible to read and copy 2315 packs in any format. I
have a bunch of Burroughs B1700 packs in the CHM collection I've been
dying to try to recover.
This all started yesterday when I stumbled upon these on eBay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130453759896
which are 200MHz ARM 9 boards with a user-programmable Cyclone II FPGA
for $35 (I bought 10..)
Hopefully, they'll be the base for a couple of different 14" drive
recovery designs.