From: Nicolas Welte (no_spam_at_x1541.de)
Date: 2006-04-30 11:15:10
Hi, Ruud@baltissen.org wrote: > All the brooken ones I had in my hands had failing PLA's. I checked that by > exchanging them with the PLA's of a working 8296. And Jens Schoenfeld can > deliver PLA replacements AFAIK. Unfortunately I believe he can't. I have some of his SuperPLA replacements, but they don't support the 8296 (yet). Of course he had access to all original PLAs for reading them out (8296, CBM-II, P500, ...), but he didn't implement those yet. And the Plus/4 PLA is said to have timing problems with the replacement, because there is an external feedback installed. I made a replacement for the "small" PLA with a GAL chip. The document can be found on Funet/Zimmers. And here you can read how to make replacements from EPROMs: http://www.vic20.de/html/eprom_pla_8296_und_c64.html In the 8296 the "small" PLA can be removed and disabled for test purposes, effectively downgrading it to a plain 8032. Nicolas Message was sent through the cbm-hackers mailing list
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