Re: Odd behavior of Disk II in a GS

[David A Lyons <dlyons@apple.com>]

In article <CHu2wu.C86@news2.cis.umn.edu> Tim Savage,
sava0017@gold.tc.umn.edu writes:
> Anyways, I plugged the controller into slot 6, and typed PR#6 from a
basic
> prompt. The computer locked up. So, I shutdown and moved the card to
slot
> 7. Again, from a basic prompt, I type PR#7, and it works. Now I'm bummed
> out because I figure something is wrong with my GS. But here's the
> completely weird part. The next time I go to boot the drive, I type
PR#6,
> out of habit, and say 'oops' as a hit return, but to my amazement, the
> drive boots anyhow!
> 
> So it appears as if my slot 6 has mapped itself to slot 7, or something
> like that, anyhow.

Since slot 6 is empty+"your card", the bytes at $00/C6xx are undefined. 
Sounds like you got "lucky" during the PR#6 and flew right through to
$C700, where it booted slot 7.

You -should- be able to boot the Disk II card just fine (by typing the
slot number it's actually in).  Note that the cart must be in slot 4, 5,
6, or 7 to run at speeds higher than 1 MHz.  (That is, if you put it in
1, 2, or 3, you must run at "Slow" speed to use the Disk II card.)

Dave Lyons, dlyons@apple.com
Mr Tangent

My opinions are my own, not Apple's.