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From: binder@dec-dosadi.UUCP
Newsgroups: net.micro
Subject: Keyboards for the Apple ]["
Message-ID: <1265@decwrl.UUCP>
Date: Fri, 8-Jun-84 14:21:14 EDT
Article-I.D.: decwrl.1265
Posted: Fri Jun  8 14:21:14 1984
Date-Received: Tue, 12-Jun-84 00:11:18 EDT
Organization: DEC Engineering Network
Lines: 16

In response to question by John Antypas:

It is most certainly possible to apply a standard $40-$60 keyboard to an
Apple.  My own machine is an Apple ][+, or at least it thinks it is - I 
built it from Apple schematics.  The keyboard is a George Risk 
Industries model 771.  The only considerations to watch are that the
keyboard must be configured for a positive-going LEVEL (not pulse)
strobe, and that there is a latch of some sort for the keyboard data,
either internal to the keyboard or added to the Apple.  I used a 74LS373
- tie the strobe to the latch enable, and ground the output enable. 

It's nice, too, to make the right arrow key work properly - that takes a
couple of cuts and jumpers, because most keyboards' right-arrow keys
transmit a  character (Ctrl/I) instead of the Ctrl/U that the Apple
wants.  It's nothing very difficult, at least it wasn't with the GRI
771, but having a schematic for the keyboard is useful.