Just to chime in here, it seems that you would be better off without the USB and going with an earlier PS2 or XT keyboard. I think it is Apple IIs that have such a device.
On Tue, 8 Jul 2025 at 12:08, Walt Perko <[email protected]> wrote: > Hi, > > > > When I needed a parallel ASCII keyboard, I decided to add one of these to > a regular USB keyboard for a computer. > > > > https://www.hobbytronics.co.uk/product/host-board I used a PICAXE chip > to take the data and convert it to TTL (RS-232 Friendly) serial data too. > > > > The modules are not sold anymore, but they do sell the chips. > > > > SIOC version: > > https://www.hobbytronics.co.uk/product/soic > > > > 28-PIN DIP version: > > https://www.hobbytronics.co.uk/product/host-dip > > > > > > > > > > > > > ============================================================================================== > C U L8r, °|° Walt Perko °|° "Kids ... teach them the good stuff, > and they still learn the bad stuff on their own." > > http://www.R2Pv1.com/ <http://www.r2pv1.com/> *RoboGuts™ Intelligent > content for 3D printing making S.T.E.A.M. education better, easier and more > affordable * > > > > Experiments to learn how to use various Electronic Components, Structured > Computer Programming, Phonemes for Speech &Song in any language, and Art. > > > "The World Needs a New Economic Model" > > ============================================================================================== > > [image: BillyBotAvatar-2centsStamp-c] > > Sent from the Cyber7 > > > > > > *From:* M100 *On Behalf Of *Thomas Morehouse > *Sent:* Tuesday, July 8, 2025 10:01 AM > *To:* [email protected] > *Subject:* Re: [M100] SPAM-LOW: 102 failing keys > > > > Being a card-carrying expert in absolutely nothing ... What about using a > USB keyboard,running into a USB to serial cable, to the RS232c port. Then > having some code in ROM/RAM to make the USB keyboard output mesh with the > M100/2 keyboard reading circuit? > > > > Just sayin' > > Tom M. > > > > > > On Tue, Jul 8, 2025 at 12:52 PM John R. Hogerhuis <[email protected]> > wrote: > > > > > > On Tue, Jul 8, 2025 at 5:26 AM Alex ... <[email protected]> wrote: > > Has anyone been able to track down replacement key switches rather than > trying to rebuild 40 year old components? With all the rage about > mechanical keyboards I'd be surprised if there wasn't a suitable > alternative out there. > > > > > > It would probably be easier to create a new custom keyboard since that is > totally DIY level now and it seems unlikely you could exactly match the key > caps. > > > > > > The model t keyboard is decent but you could potentially make a better > keyboard that way. > > > > -- John. > > > >
