"J.S. Garrison" ha escrito:
If what Stuart says is true and you've rewired an ADB keyboard to work, remove it and reboot.
Do you say that you can just take an ADB keyboard and rewire it to work at the Mac Plus phone-like keyboard port? I didn't know that ADB and the original Macintosh keyboard protocol were compatible... Surely, AFAIK both are very simmilar at hardware level: a clock line and an open-collector data line (OT: the PC's and PS/2's keyboard and mouse ports use also this schema). But are they also software (low level packet format, device detection, data interchange) compatible?
They aren't close. The old keyboard is similar to the PS/2 or original PC style keyboard. ADB is different because, as the name (Apple Desktop Bus) says, it's a bus allowing multiple devices to be connected. Because of this the protocol is more complicated. It has an address field and other info that identifies what the device is.
When ADB first appeared there were some adapters to go one way or the other. The problem with them was they cost at least a significant fraction of the device. -- -- Clark Martin Redwood City, CA, USA Macintosh / Internet Consulting
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