If I remember rightly, the ROM in the Model 100 is simply all the memory addresses from 0 to 32767. You can read them using PEEK in a FOR loop and write them (as ASCII) to the serial port.
But, of all those myriad bytes, I’m most curious about PEEK(1) as that’s the one that gives you a general sense of what machine you’re running. If it is equal to 225, the code for the original Kyocera Kyotronic KC-85, then the date algorithm I wrote would already work as the Japanese also use the DD/MM/YY format. There’s some discussion on the bug reports I filed: kbd buffer <https://github.com/bgri/m100LE/issues/40#issuecomment-1302636101> and date formats <https://github.com/bgri/m100LE/issues/16#issuecomment-1209656653>). Here’s a summary of what I believe so far: Model DATE$ format ID in PEEK(1) Year (ones place) Year (tens place) Kyocera K85 (Japan) DDMMYY 225 63796 63797 Olivetti M10 (Italy) DDMMYY 35 63796 63797 Olivetti M10 North America ? 125 NEC PC-8201 NEC PC-8201A YYMMDD 148 63548 63549 NEC PC-8300 YYMMDD 148 (same?) Model 100 (US) MMDDYY 51 63789 63790 Tandy 102 (US) MMDDYY 167 63789 63790 Tandy 102 (UK) (same?) 167 63789 63790 Tandy 200 (US) MMDDYY 171 65333 65334 Televerket 100 (Norway) DDMMYY ? ? ? I hope you’ll also upload the audio from the cassette of the Norwegian patch for your machine. Here’s an example <https://archive.org/details/t-backup-audio-tutoria/> of a different audio cassette someone uploaded to archive.org. —b9 P.S. To turn a hexadecimal dump into a binary file on a UNIX machine, you can use `xxd -r -p`. On Thu, Jan 22, 2026 at 12:20 AM Rune Devik <[email protected]> wrote: > Hi > > I would be happy to help! Is it possible to read the rom content from > Basic and output to serial or do I have to extract the roms physically and > dump them? And if so, what equipment do you suggest I check out to do that? > I have a lot of stuff in my lab but no ROM reader yet ;) > > Also, is there a page for the m100 like for the trs-80 model 1 where known > rom versions are specified etc.: > https://www.trs-80.com/sub-rom-checksums-model-1.htm > > mvh, > Rune Devik > > On Wed, Jan 21, 2026, 18:03 Joshua O'Keefe <[email protected]> > wrote: > >> > On Jan 21, 2026, at 6:48 AM, Rune Devik <[email protected]> wrote: >> > >> > as you "feared" that means that when you set the date you use: >> DATE$="DD/MM/YY" which is correct in Norway but not what you use in >> America. It also has the three special Norwegian letters ØÆÅ. >> >> Hello Rune. I think if you were to do so the community would be very >> interested in seeing a dump of the ROM from this system. Not all >> localizations of the ROM are known or collected and it's possible yours is >> one of them. > >
