Georg, What type of ROM chips did you use, when you replaced your ROMs with patched versions? I've been pondering what the simplest way to do that is. The 8K M13 socket is wired oddly, and doesnt seem compatible with a 27C64. thx Steve
On Sun, Nov 13, 2022 at 12:30 PM Georg Käter < [email protected]> wrote: > Hello together, > > > > I own a M200 "German/EU Version" (Art.Nr. 26-3860H) w/modem, for German > market it was delivered with set of keyboard > > caps and a data tape including driver for keyboard and printer. I tried > this in VirtualT and it seems to work so far. To run REX > > on my M200 I replaced original ROM by ROM from VirtualT patched to serve > german keyboard mapping. > > For your reference I´ve added original ROM files and files from tape for > your reference. > > > > Regards > > Georg > > > Georg Käter > Gangolfsweg 44 > D-52076 Aachen > Tel. : +49 2408 7194987 > Fax. : +49 2408 7196758 > Mobil : +49 171 4839954 > E-Mail : > [email protected] > > ========== Ihre Nachricht ========================================== > > *von* : Cedric Amand <[email protected]> > *gesendet* : Sonntag, 13. November 2022, 15:37 > *an* : [email protected] > *Betreff* : [M100] custom key mapping generator for Tandy 200 > > __________ Originalnachricht _______________________________________ > > My point exactly Brian ! > How did they come up with that idea ? It makes no sense. It really > prevents you from using the option rom socket. > The docs does not talk about removing it. > > And even if you could remove it ; the installation procedure of that ROM > is not easy at all, requires to type two "calls" with the freaking keyboard > inverted. > OK - us nerds 40 years later can do it easily, just type "CQLL", but > imagine explaining that to a random journalist in 1984 ?! > Especially as the french doc (which I happen to have) says to type "CALL" > not CQLL. > > I also wonder if other markets are affected by this plague, > If anyone here lives in germany and owns a qwertz (or other keyboard > variant) of the M200 : do you have a "stock option ROM" as well ? > > I also wish to thank Stephen publicly for the time he invested into > helping me, as indeed, you can't use an option ROM (and even less a REX#) > in those non-qwerty M200s, and I think this research might help some other > people at some stage (this hobby is booming right ? :) ) > > We're (and I am) in the process of replacing the main rom + 8KB rom with a > 27C512 flashed with a custom "native Azerty" firmware > Which should free up to option socket, for a REX# > > I also plan to make other modifications to that custom ROM, but we'll see > if I get there. > I've also been experimenting in the past with custom firmware for the my > M102 for different reasons. > I'm a "modem" nerd and I have all the equipment (PABX, etc) to make voice > calls between my vintage laptops - so it's important for me to have my > modems work. This required a custom firmware to make my M102 work, with > modem, with a REX#. ( OK I think this kind of stuff is only relevant to me > this time :) :) > > > Le 2022-11-13 14:53, Brian White <[email protected]> a écrit : > > Nice. > > So the point would be to make the main rom natively azerty to match the > hardware, free up the option rom slot for normal use, without otherwise > changing the main rom so that it becomes incompatible with application > software? I guess you might even be able to make a dvorak version and move > the keycaps around? > > I'm just trying to imagine the sales pitch for that azerty 200 that needs > the option rom, thus preventing the use of any other option rom (or at > least making it pretty inconvenient by having to swap them on every reset I > guess?) > > "Here's your new model 200. It's only half as useful as others with no > modem and no option rom but you can still pay full price please." > > -- > bkw > > On Sun, Nov 13, 2022, 8:28 AM Stephen Adolph <[email protected]> wrote: > >> hi folks, >> >> Thought I would share this work. It is a spreadsheet for computing the >> keyboard table in the T200 so you can make native custom keyboards for T200. >> >> Why? >> The AZERTY keyboard in Europe was accommodated using an option ROM that >> kinda hacked the keyboard. Keystrokes get intercepted and corrected to be >> AZERTY even though the main ROM is set up for QWERTY. >> >> An alternative is to have the main rom directly support AZERTY. >> To do this, there are 6 keyboard mapping tables that start at 9763h. >> Each table are 44 bytes long. >> >> This spreadsheet lets you assign the ascii codes for each of the 44 >> affected keys, for all 6 tables. (unshifted, shifted, GRAPH, shift GRAPH, >> CODE, Shift CODE). >> >> It is an excel spreadsheet that included the analysis add it so that >> certain needed functions are present. >> >> Once you make the correct keyboard mapping, the spreadsheet provides the >> 6x44 bytes in assembly compatible form, so you can compile and patch the >> tables with a hex editor. >> >> This approach could be used for other machines also. >> Note - the AZERTY keyboard did NOT modify the actual character set, so >> that is out of scope. Of course it is possible to patch the main ROM to >> change the bitmaps as well. Not handled by this spreadsheet. >> >> Comments welcome. >> Steve >> >> > > > __________ Ende Originalnachricht __________________________________ > > > *Vertraulichkeitsinformation: *Diese Nachricht ist vertraulich. Die > Informationen dieser Nachricht sind ausschließlich für die persönliche > und vertrauliche Verwendung durch den/die oben genannten Empfänger > bestimmt. 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