[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [N8VEM-S100:3592] Re: Run of Dual CF-Card/Hard Disk IDE S-100 Boards

Is this the older V2 board or the newer V2a board





From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of geka...@gmail.com
Sent: Friday, May 9, 2014 9:24 PM
To: n8vem...@googlegroups.com
Subject: [N8VEM-S100:3592] Re: Run of Dual CF-Card/Hard Disk IDE S-100 Boards


Assembled a dual IDE board this evening, and am having an interesting problem.

I'm using 2 Syba IDE-->CF cards with 128mb CF Flash (have also tried some 4mb Kingston types).

If I output directly to ports I can control the hex display and select drive "A" or "B", although the "A" and "B" drive LED's seem reversed.

Using MYIDE.COM it will only initialize if both drives are present, and then I can't select drive "B" from the program.  It will access and format drive "A" just fine.

I've tried swapping 74LS03's out, and changing them to 7403, 74LS38 and 7438 types with no improvement.  I've also swapped out every other chip on the board, and resoldered everything.

Any ideas of where to look?

- Gary

You received this message because you are subscribed to the Google Groups "N8VEM-S100" group.
To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s100+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.