Could it be that code changes might be related to the modem needing to be CCITT 300 instead of BELL 103? The modulation is basically the same but some of the tones are different. Also the cadence for going off hook, detecting dialtone, and dialing are different as well. To properly answer a call, the code would have to detect the dual ring they use.
That is if the internal modem is still there, and the code has not been modified to use an external modem of some kind. Regards, Peter > --------------------------------------------------------------------- > > Message: 1 > Date: Fri, 25 Sep 2020 16:39:58 -0400 > From: Stephen Adolph <twospru...@gmail.com> > To: m...@bitchin100.com > Subject: Re: [M100] European T102 - different! > Message-ID: > < > camcmnv7z9eyqtjvk1tms4dkdvo1r+2c+6eq_fykiodvaul7...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > received a ROM image from a UK T102, and the rom is really different! > I've attached it here. > Large area of difference in the ~5100h to ~5700h area, which is TELCOM > > On Thu, Sep 24, 2020 at 1:34 PM Josh Malone <josh.mal...@gmail.com> wrote: > > > On Thu, Sep 24, 2020 at 1:31 PM Stephen Adolph <twospru...@gmail.com> > > wrote: > > > >> > >> > >> here you can see the different code in silkscreen, and a variable > >> resistor mounted above the main ROM. > >> > >> > > Huh - interesting. Yeah, curious about the changes on that machine. Do > > keep us posted! > > > > -Josh > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200925/8560b350/attachment-0001.html > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: UK_main_rom_102.bin > Type: application/octet-stream > Size: 32768 bytes > Desc: not available > URL: < > http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200925/8560b350/attachment-0001.bin > > > > ------------------------------ > > >
