Re: Different ROM 3 ROM chips ?????

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <3to2pi$n8h@agate.berkeley.edu>,
Kevin Lee Miller <kevinm@uclink.berkeley.edu> wrote:
> 
> I also have the same chips that is in UJ9 it's 341-0149 and UJ11 it's 
> 341-0128.

I think you mean -0749 and -0728.  Assuming the numbers were allocated
in chronological order (which seems to be true in most cases), then
341-0728 (the rare version) is older than 341-0737 (the common
version).  However, 341-0749 (the other half of the rare version,
which I thought was 341-0729) would be newer than 341-0748 (the other
half of the common version, and the one with the bugs fixed).

This is probably an exception: maybe two versions of the ROMs were
done, and the wrong ones (prototypes) got shipped in some machines
(particularly dealer demo machines) or the numbers were swapped at
some point.


Now, it is possible that 341-0749 is yet another version.  My
comparison (see my earlier posting on this thread) was with a ROM that
I was told was labelled "341-0729".  This could have been misread.

The only way to be sure would be for someone to send me a copy of the
contents of 341-0749, and I can do a comparison against the other
versions.

(If anyone wants to do this, please E-Mail me first.  I can tell you
how to save a copy of the ROM to disk.)
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand