15 Aug
2008
15 Aug
'08
2:55 p.m.
On 15 Aug 2008 at 17:13, Dave McGuire wrote:
Remember, there were quite a few years between the
10/20MB
Bernoullis and the 90MB units. I've seen gazillions of those ISA
controller cards at surplus yards years ago, but I don't know where
one would find them now. There wasn't much logic on them; maybe
10-12 TTL chips.
If, as one of the posters has suggested, the controller card for the
20MB BBox is the PC-2/50:
http://stason.org/TULARC/pc/hard-disk-floppy-controllers/I-L/IOMEGA-
CORPORATION-None-PC2-50-PC2B-50.html
then the same 8 bit ISA card shipped with the 90MB units. Mine has
the same layout as described above, with mostly jellybean TTL logic
and a 2Kx8 Sony SRAM and a boot UV EPROM. A total of 5 PALs on the
card labeled 129703, 134880, 129501, 129400 and 128602.
Manufacturing date is 12/12/91. I recall being mildly surprised at
the retro-ness of the card; not just the 8 bit part, but the use of
SSI LSTTL logic when the rest of the world was using LSI CMOS.
Cheers,
Chuck