Imsai Vdp 40

From: Sam Ismail <dastar_at_ncal.verio.com>
Date: Sun Aug 16 14:50:47 1998

On Sun, 16 Aug 1998, Jack Peacock wrote:

> >Has anybody heard of the Imsai Vdp 40 machine? What is it, and
> how many have been made?
>
> Not sure how many were made, but the VDPs came out in the late 70's,
> around '78 or '79 as I remember. I bought several to use as special
> purpose POS terminals in a casino. They were in a "standard" size
> IMSAI/S-100 case, but they had a short motherboard (8 slot? have to
> look) and bays for two full height 5.25" floppies. Typically they came
> with an IMSAI 8085 CPU card, a two board floppy controller (not very
> reliable), PerSci floppies, and a 64K DRAM memory board. The power
> supply was scaled down from the big 500 watt version, plus it had an
> extra regulator board for the floppy power. There was no front panel,
> just two buttons, RESET and INT (I think this was connected to one of
> the S-100 interrupt lines), and a power switch.

That's interesting. I've got two of these but always referred to them as
"turn-key" IMSAIs. I thought the VDP-40 was that all-in-one computer that
IMSAI came out with in the same timeframe that was so bug-ridden that most
were returned to IMSAI and hardly any are in existence anymore?

Is my information wrong?

Sam Alternate e-mail: dastar_at_siconic.com
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Received on Sun Aug 16 1998 - 14:50:47 BST

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