Mayyyyybe none that matters, but, I have these notes about the option rom socket: https://drive.google.com/open?id=1ktI-KbRSu9drAOxGeEwzE2eil3YPtd_a6uABg_X1maA
And Bitchin100 has this about the main rom: http://bitchin100.com/wiki/index.php?title=Model_100_ROM And the only potential discrepency is pin 23. For the MAIN rom: In the early M100s, it's labelled /CE, but that is confusing because there is already a /CS on pin 27, and I thought they were just different possible names for the same thing. But sure enough it's written that way in the manual too: http://ftp.whtech.com/club100/doc/m100ServiceManual.pdf#page=125 For the OPTION rom: In M100 and T102, pin 23 is NC. In T200, pin 23 is connected to ALE, but you can ignore it if you're making a rom adapter and leave that pin disconnected in the adapter. If you were making an adapter, or simply writing a cheat sheet document for mapping the pins, that was supposed to work in both the main and option rom locations, I'm not sure if there is any single mapping that is ok in all cases (all models option rom sockets and old M100 main rom socket), even though in most cases it *looks* like you just ignore it and leave it unconnected when you're talking about putting a new part into the old socket. -- bkw On Thu, Jun 28, 2018 at 3:11 PM Mike Stein <[email protected]> wrote: > ----- Original Message ----- > From: Brian White > To: [email protected] > Sent: Wednesday, June 27, 2018 2:59 PM > Subject: Re: [M100] nn - getting back involved. > > ... > > Also, the rearranged pinout for Model 100 main rom is different from the > rearranged pinout for the option rom! > ... > > Interesting; what is different? > > m > > -- bkw
