On Thu, Oct 4, 2018 at 05:00 AM, lop pol wrote:
It has Mostek MK36694J-5 and MK36693J-5 ROMs. Are these something that in
order to do a proper restore need to be replaced?
IIRC the 468 ROM's came in three revisions, -00, -01 & -02, where
-00 and -01 were Mostek. The -02 had the same digital content as
the -01 but were CY7C264 EPROM's. The Mostek's are unreliable and
for that reason ought to be replaced although replacements could
be hard to find. With an adapter board common 27C64's could be used.
/H?kan
zenith5106