----- Original Message ----- From: "Al Kossow" <[email protected]> To: <[email protected]> Sent: Tuesday, September 13, 2016 12:34 PM Subject: Re: G4 cube (was Re: 68K Macs with MacOS 7.5 still in production use...)
> > > On 9/13/16 9:25 AM, Mark J. Blair wrote: > >> If you are not opposed to making a custom PCB to stuff with Cherry MX >> keyswitches, then you have a lot of freedom. > > True enough. I have even bought some switches and non so great Cherry > keyboards to harvest keytops. > About 10 WY-30 keyboards in so-so condition showed up for about $7 ea, so > i'll probably just go with > that, since they seem to be the least desirable (next to WY-50) for the > mechanical collectors. > > Televideo was pretty consistent with their serial keyboard protocol and > voltages, Qume.. not at all. > I've identified at least 4 different styles of 4-pin connector keyboards > using either 12 or 5 volt power. > > Then, there is ADDS, Hazeltine, Microterm, DG, Freedom, ... > =========================== How about Falco? I've got four or five different models/versions here; do you want me to dump the ROMs? Doesn't seem to be much interest in Falcos but I guess I really should scan the docs one day anyway.. They also used 4-conductor (straight-through) phone-type coiled cords, but with non-contact inductive 'keyswitches' that move a little ferrite core between pads on the PCB; no rotted foam or bad contacts ;-) m
