IIgs ROM versions (was Re: Overlay Revisions)

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

In article <41t8pg$ofu@opal.southwind.net>,
Randy Shackelford <shack@onyx.southwind.net> wrote:
> David Empson (dempson@atlantis.actrix.gen.nz) wrote:
> 
> : Incidentally, what is the part number written on the ROMs in each
> : machine?  I'm still trying to track down a copy of one of the rare ROM
> : 3 versions so that I can analyse what changed.  I don't have the
> : numbers handy right now.
> 
> The old ROM 3 has 341-0749 on the FF-FE chip and is the 32 pin chip with the
> extra pins added to the socket. The FC-FD chip has 341-0728. This machine has
> 28 pin sockets. The new ROM 3 has 341-0748 on FF-FE and 341-0728 on FC-FD.
> It has 32 pin sockets and both chips are the 28 pin variety.

Aha!  That 341-0749 ROM is the one I'm after.

The vast majority of ROM 3's have 341-0748 and 341-0737.  I know of at
least one machine that has 341-0729 and 341-0728.

I've checked the contents of those ROMs and identified the
differences.  341-0728 is identical to 341-0737.

Would you be prepared to E-Mail me a BinSCII'ed shrunk copy of the
image of the 341-0749 ROM?  I can give you the necessary commands to
enter into the monitor to save it to disk as a binary file.

(If anyone else has this ROM and is prepared to E-Mail me a copy,
please check with me first - I don't want to receive several copies!)

Once I've analysed it, I'll update my document describing the
differences between the three versions and repost it.


Any advances on three different ROM 3 versions?  :-)
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand