From: Davison, Lee (Lee.Davison_at_merlincommunications.com)
Date: 2004-02-07 14:07:44
So it didn't work first time and I couldn't figure it so I borrowed a logic analyser to fault find and that didn't work properly so I took the lid off and it has a 6502 inside so I've been a bit distracted. 8^)= (If anyone on the list has a Thandar Thurlby LA-160, or the destruction manual, please get in touch) Status now is I (seem) to have a reliable ISA card port, there were some timing issues that I wouldn't have expected from a 1MHz machine driving a 4.77MHz (min) bus. The really good news is it will talk to other 8 and 16 bit cards. (only those 16 bit cards that support 8 bit I/O accesses) The software works under WinVice, at least as far as you'd expect, but on my Vic the damn machine keeps falling over if I enable the RESTORE key interrupt (which I want for test purposes). Is this a known problem? I think I'm overflowing the stack due to multiple NMIs (from a possibly flakey RESTORE key) but am just guessing at this stage. Full description, pictures, diagrams, source etc will be posted on my site when it's done (16 new pages written but not posted so far, probably more before it's done). Next project I think will be a logic analyser. 8^)= Lee. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________ Message was sent through the cbm-hackers mailing list
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