Northstar Horizon boot disks

Steven Hirsch snhirsch at
Fri Apr 2 16:24:43 CDT 2010

On Mon, 29 Mar 2010, Dave Dunfield wrote:

> Bootstrapping a Horizon if you don't have a working boot disk is tricky, but
> it can be done - the main issue with a Horizon is "how to I get the code into
> the system" - because there is no front panel or ROM monitor. Fortunately
> there is a 1K ROM socket on the NorthStar CPU card. I can provide a little
> (500 byte) monitor which will provide basic read/write memory commands, and
> the tool mentioned above can be configured to "type" data into this monitor
> as well - I have pre-configured in-ram images of both single and double
> density NorthStar DOS with my client which can be transferred into the system
> and launched using this little ROM monitor. Then you use the PC "NST" tool
> to transfer a boot disk image to physical media.


Where can I get ahold of the image for that ROM monitor?  I have a Horizon 
here that came with 9 boxes of hard-sectored diskettes.  Unfortunately all 
of them are blank :-).  Any tips on bootstrapping my way into a functional 
system would be greatly appreciated.



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