Northstar Horizon

From: Richard Erlacher <>
Date: Tue Nov 2 09:13:48 1999

Yes, there were several ways in which the N* could be modified to work
better and meet the target of providing a full 64K TPA and handling CP/M
standard diskettes.

The easiest way, however, was to use hardware from other MFG's, which didn't
require modification. It happens that hardware from other MFG's was less
costly as well.


-----Original Message-----
From: <>
To: Discussion re-collecting of classic computers
Date: Tuesday, November 02, 1999 6:22 AM
Subject: Re: Northstar Horizon

>> The same thing was "wrong" (meaning that it irritated me and offended my
>> sense of how things should be) as with the N*, in that they used memory
>> space I wanted to use. Consequently, I never seriously used, nor did I
>> promote them. It was no big deal, but at the time I thought that it was.
>My solution was far more reasonable. Map it <VDM1> at 4000h and set a bit
>to enable it (small hack). That way it used no TPA space and was still
>faster than using a TTY. I later set up one of the NS* controllers that
>way for a full 64k space. Of course I had to write my own drivers but it
>was pretty trivial.
Received on Tue Nov 02 1999 - 09:13:48 GMT

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