13 May
2014
13 May
'14
5:17 p.m.
On 13/05/14 7:21 PM, David Riley wrote:
On May 13, 2014, at 18:55, "drlegendre ."
<drlegendre at gmail.com> wrote:
IIRC there were a few third party upgrades - Levco, and others whose
names I forget.
--Toby
Back at the time, it was apparently common for folks to replace the ROMs in
a M0001 128K Mac with the ROMs from a 512 / FatMac. Some other enthusiast
might have snagged them for their own upgrade project.
Among other things, the swap allows the 128K machine to boot directly from
an external HD, like the SD20. It may have other changes and hooks, to
allow use of later MacOS versions - but on a 128K board, I'm not sure how
far that gets you.
Well, upgrading a 128k board to 512k is a relatively simple
operation, since they were the same actual board with a
different BOM. Getting beyond that is another question; I'm
interesting in finding out what was done to the 128k that
I grew up with (and still have) that has 1MB and definitely did
boot from an HD20 for much of its life, but wouldn't run
some games (notably, Prince of Persia) which needed
a Plus.
- Dave