From: Ethan Dicks (erd_at_infinet.com)
Date: 2003-06-10 00:30:05
> Since some of the early C64's used the 82s100 instead of the MOS > 906114 can't this GAL/adapter fix work on most c64 boards (rev A-C)? The 82S100 is shipped as an unprogrammed programmable chip. The 906114 is manufactured to be the same as an 82S100 programmed for an early-rev C-64. The "906114" is just the Commodore part number for a masked-programmed PLA for those boards. Not that it's easy to find a blank 82S100 these days (nor a programmer that can blast one), with the logic equations on funet, it's possible to program the real thing, once you find the parts. As to the specific question, I can't comment on a GAL adapter, but in general, PLAs are more like ROMs than GALs... they are different internally and solve different design problems. It may be possible to convert a specific PLA map to a set of GAL equations, but only on a case-by-case basis. There's no general solution. -ethan -- Visit "The Seventh Continent" http://penguincentral.com/penguincentral.html Message was sent through the cbm-hackers mailing list
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