----- Original Message ----- From: "Nickolas Nolan" <[email protected]> To: <[email protected]>; <[email protected]> Sent: Wednesday, June 27, 2018 11:35 AM Subject: Re: [M100] nn - getting back involved. ... > The reference I have for the model 102 is here http://tandy.wiki/FigTronix > again, I'm not sure how much of that documentation is correct, and I will try > to look at a few more units from my trunk this weekend. I've been meaning to > attempt a dump of my SuperRom in my 102.
-------- For replacing the non-standard System ROM in an older (pre-12/83) M100 you might want to also look at this adapter: https://www.oshpark.com/shared_projects/Kil9S1ya Unlike the FigTronix this one does not require desoldering the socket or any modifications to the M100, uses a standard DIP 27C256 EPROM, and it is reprogrammable. As a bonus you can optionally combine an option ROM image with the system ROM using a 27C512 instead of the '256; this precludes using the option ROM socket for an additional 'normal' option ROM or indeed anything that normally plugs into the option ROM socket such as the REX etc., although you could install a switch to disable it. m
