Re: Rev. C SCSI v2 from GSE-Reactive.com

["Henry" <apl2research(at)comcast.net>]

Hello Michael.

I'm not 100% sure how I fried the terminator.  When our version of the Rev. 
C was laid out we included the Power Termination mod built in and selectable 
via the DIP.  I tired the DIP and I could hear a sizzling noise from the 
Power Supply, I think.  After that I couldn't see the drive from the 
original Rev. C card.

The idea is if the our version of the Rev. C worked then we could sell or 
give away the prototypes.  Maybe we'll rename the Power Termination mod to 
the Terminator Termination mod. ;-)  Can't see how 5v to Pin 24 of the 
header would damage anything though.

> The first question has to be:  Did the boot sector get read into memory?
> My guess is it didn't, but the boot ROM "thought" that it did and
> branched to where it would be.

I don't think it's even getting that far.  It looks like there's some kind 
of emulation issue with the 74LS133 IC from what I've been told.  I'm not 
100% sure though.  In order to really find out it would be weeks of timing 
checks and simulations.  Can't wait to start synthesizing with the next 
project.  Altera all the way next time.  That iseLEVER gives me a headache.


-- 
Henry S. Courbis
www.GSE-Reactive.com
Apple II Series Legacy Hardware - Come take a look at what we have to offer!