North Star Horizon

From: Allison J Parent <>
Date: Fri May 15 22:52:51 1998

<[NS* terminal .vs. video board]
<Oh, agreed. The original Horizon configuration was to have a serial
<terminal. I seem to recall a pair of 8251-based serial ports on the
<motherboard, one of which was used for this.

There was exactly that, two serial ports, a hearbeat interrupt and a
parallel port. In the 78-81 time frame, most video cards were 64char
and only some had decenders. Terminals onthe other hand were 80char,
full upper/lowercase and generally required less software than a memory
mapped display.

<a serial port (and a standard MDA card), etc), I wondered if a Horizon co
<be set up with an S100 video card as well. I guess it can.

Most s100 crates could be...even a SOL could ahve more than one!

<YEs, it does look to be a nice machine. One day, when I've got a few
<minuts spare, I'll dig mine out again and look at it more seriously.

After working with the Altairs noisy bus and toggling boot loaders
it was a pleasure to see good signals and boot on reset. The IMSAI
was a better machine than altair but when I moved up I really didn't want
a front pannel and I needed more serial IO, the NS* box, CPU and the MDS I
had in the altair solved most of my problems.

CCS, compupro, altos, Vector and a few others had S100 boxen that were
equal or better (compupro was really good!).

Received on Fri May 15 1998 - 22:52:51 BST

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