It's the V2a board that Ed just mailed out this week. I've also tried decreasing the pull up resistors on the 7403's to 330 ohm.
I noticed that David Fry has suggested using a 74S03 in his notes, unfortunately I don't have any here to try. - Gary On Saturday, May 10, 2014 12:36:15 AM UTC-4, monahanz wrote: > > Is this the older V2 board or the newer V2a board > > John > > > > > > > > *From:* [email protected] <javascript:> [mailto: > [email protected] <javascript:>] *On Behalf Of > *[email protected]<javascript:> > *Sent:* Friday, May 9, 2014 9:24 PM > *To:* [email protected] <javascript:> > *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 [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
