Very interesting Rob! AMD calls their GALS PALCExxx. Looking at the pinouts, the NS, AMD and Lattice PAL and GAL 16V8's all look the same.
But based on your observation I set the Wellon VP-290 to think it was programming National Semi GAL's and would you believe it programmed OK! Interestingly, if I add the "verify" option, it fails to program correctly. But at least the pins in hardware behave as expected. Clearly a very simple set of equations, will obviously have to do more. But I may have a solution, thanks for the pointer. Will also see what Wellon says (they are quite helpful with e-mails BTW). John -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rob Doyle Sent: Saturday, March 22, 2014 11:54 AM To: [email protected] Subject: Re: [N8VEM-S100:2870] Help Programming PAL's/GAL's On 3/21/2014 9:31 PM, monahanz wrote: > Has anybody in this group had experience in the past programming > simple GAL’s. I helped some of the folks recreating the Heathkit H89 with more modern parts a few months ago. The original H89 used fusable link PROMs as decoders - which are mostly unobtainable or expensive. I redesigned the logic so that we could use a bunch of GAL16V8s. I uses the PALASM4 Ver 1.5 from: http://www.engr.uky.edu/~melham01/ee481/software.htm I also used DOSBOX. I don't see anything wrong with your design. I don't think PALASM4 supports GALS. Somehow the person that built the board converted from 16L8 format to 16V8 format. I wouldn't assume that a .JED file for a 16L8 would work with a 16V8. The JED file is a fusemap. Also different manufacturers have different programming algorithms. What part are you using, exactly? Rob. -- 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. -- 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.
