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Re: Run of Dual CF-Card/Hard Disk IDE S-100 Boards

Ok, armed with the correct schematic...

O34,0  lights D18/Select Drive A
O34,1  lights D19/Select Drive B

MyIDE flashes D18A for a brief moment, then lights D19/B.  At that point the program "thinks" it's accessing "A" but remains on the P40/left CF disk.

- Gary

On Saturday, May 10, 2014 9:26:34 AM UTC-4, David Fry wrote:
Hi Gary,
I'll try to go through this in a step by step logical fashion.
I had problems when I first brought my version 02 card up because the schematic didn't match the screenprint and board behaviour, it turned out that this was purely a schematic labelling issue and so the schematic was corrected in KiCad but because some 'net' labels had their names changed KiCad forced a re-route of the board, hence v02a.
Let me first say that the changes were purely label changes within the schematic not connectivity related i.e Pin 8 of U18C still goes to P40 pin 25, and pin 11 of U18D still goes to P41 pin 25 etc...
Let's first try to establish correct drive labelling and selection, so here goes,
The correct schematic for IDE ver02a should be dated 23rd March 2014 in the bottom right corner of the drawing. the one you have downloaded from John's website is one of the intermediate diagrams where some labels are still wrong. I have let John know and I'm sure he will correct this.
Referring to the diagrams in KiCad as uploaded by Andrew (S100 IDE-002.ZIP) not sure if you have KiCad loaded ??
From left to right on the PCB your LEDs should be screenprint labelled D20 (Activity B), D21 (Activity A), D19 (Select B), D18 (Select A)
The CF slots themselves match this pattern, P40 (Left Connector) is Drive B, and P41 (Right Connector) is Drive A
Now using your CPU monitor output the following values to ports, can you confirm the following is true (this assumes you are using the default port settings)
QO34,0        (D18 should be lit indicating Drive A)
QO34,1        (D19 should be lit indicating Drive B)
David Fry

On Tuesday, March 18, 2014 10:27:41 PM UTC, Edward Snider wrote:
Hi everybody,

I'd like to do a board distribution project of Dual CF-Card/Hard Disk IDE S-100 Boards.

Is anyone interested in getting one or more of these?

Just post here and I'll get a list started.