On Fri, Jan 30, 2026 at 5:11 PM B 9 <[email protected]> wrote: > Thanks, Stephen, your bank switching code worked perfectly to access the > MULTIPLAN. Once I add the PC8300's ROM banking scheme, my code will be able > to do a proper checksum of any Model T. (It shouldn't be too hard since > NEC's technical reference manual covers bank selection.) > > Does anyone have any advice on the best place to place assembly language > programs with ORG so they can run on any Model T? I've been using 60000 > since it seems to work on even the 8K RAM machines, at least according to > Virtual T, although I admit I don't know how. Does an 8K Model 100 put its > memory at the highest addresses and have a hole in the middle? > > Side note on researching ancient tech documentation: I tried looking for > that "Secrets of ROM Revealed" book and Google completely failed me in a > way I haven't seen before. Even when I added "archive.org" to the search > terms and put "ROM" in quotes, it just gave me a link to people searching > for the book which led to a page on archive.org saying "This item was > removed". I tried Google Books and Hathi Trust and neither had ever heard > of it. I even tried a shadow library (Anna's Archive) and came up with > nothing. Just as I was beginning to think "the ROM" must have some very > deep secrets indeed to have buried this revealing exposé so completely, I > found the book! If you search archive.org directly instead of relying on > Google, it turns up. Here it is: > https://archive.org/details/secrets-of-rom-revealed, uploaded by our own > Brian K. White. It's interesting that a reference book could nearly vanish > like that simply by not being properly indexed. Thank goodness for > archive.org! > > —b9 > > I can only speculate it may be because the copyright holder was defending their copyright.
I came to the Model T community in 2004 but I was able to buy my copy from Mo's widow. That's not to say it's still available for sale, I do not know. -- John. >
