Northstar Horizon Question

From: Wirehead Prime <wirehead_at_retrocomputing.com>
Date: Fri Apr 10 19:46:10 1998

> The behavior is this. When I hook the drive up to the controller and
> power the box on, the light stays on and the disk spins and spins forever
> but the head never loads. I've tried a couple different drives so it's
> not the drive. Out of curiosity I flipped over the drive cable to make
> sure I didn't have it on backwards and the light doesn't come on on the
> drive and the drive doesn't spin in that case.

Oh I get it. The deal is that the Northstar controller isn't being
jumped to on power on like it's supposed to and so it's going to sit
turned off...when I flip the cable over the right way it sits, when I
flip it the wrong way it turns on. Aha. So the POJ header on the cpu
card is wired up maybe to jump to the Thinkertoys board?

I don't seem to have a manual for the CPU card though I do for the
general system, NDOS, NBASIC etc.

Can someone tell me what that POJ jumpered should be wired as to jump to
our friend the Northstar Disk controller? I think the address is E800 or
E900?

Thanks in advance...

Anthony Clifton - Wirehead

PS: Sometimes I ask questions while I'm working on answering them myself
so that, in case I can't answer them myself, I still learn something and
also don't waste time. Plus, alot of times when I think I know the
answer, I find I don't know the ENTIRE answer...just a specific subset.
Received on Fri Apr 10 1998 - 19:46:10 BST