I'm sure an ADB-to-Plus adapter would involve a processor. You could use a simple microcontroller, like the Intel 8049 (the one used in the original Macintosh and IBM PC keyboards, by the way), or the Motorola 6808 (is it in production still?) to do the task.
The hardware would be really simple: a small board with the microcontroller and a crystal. You get the power from the Plus' keyboard port, and both keyboard ports' data lines can be connected directly to microcontroller's I/O lines. But the software could be more of a problem: you would need a program that monitored both ports in real time, keeping the right time and, in the case of the Plus' port, maintainig sychronismo with the port's clock line. I think it wouldn't be a simple task, but once written, producing it shouldn't be more expenive than the cost of the microcontroller, the circuit board and the needed cables and connectors. Greetings, Antonio Rodr�guez (Grijan) <ftp://grijan.cjb.net:21000/> Jeff Walther ha escrito: > Are the specifications for the Plus keyboard protocol and the ADB bus > protocol still available somewhere? With the inexpensive PALs > available today, I would guess that there's a better than even chance > one could whip up an adapter on the cheap, if one knew what signal > conversions are needed. Getting the required information always > seems to be a bear. I'm occasionally tempted to bid on some of the > sets of Apple Developer CDROMs that show up on Ebay in hopes that > they'll contain that kind of information. > > Jeff Walther -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> --------------------------------------------------------------- iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com ---------------------------------------------------------------
