5 Jan
2015
5 Jan
'15
7:04 p.m.
On Mon, Jan 5, 2015 at 7:52 PM, Al Kossow <aek at bitsavers.org> wrote:
Has anyone ever noticed a pattern to the numbering on
the underside of MMI PALs?
I think those are packaging lot numbers, so they may not have a 1:1
correspondence with part numbers.
Next thing to do is trace the pinouts and see if the
house-marked 6809
memory mapper is a MC6829.
The Motorola SC67476 is apparently an MC6829. The SC prefix indicates
that it was sold as a custom (or semi-custom) part, so it could have
functional, electrical, or timing differences from the MC6829
specifications.