Bernoulli Box controller?
cclist at sydex.com
Fri Aug 15 16:55:17 CDT 2008
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:
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.
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