Thread View: net.micro.atari
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Started by J.STEKAS
Thu, 15 Aug 1985 13:27
800XL Keyboards at Radio Shack
Author: J.STEKAS
Date: Thu, 15 Aug 1985 13:27
Date: Thu, 15 Aug 1985 13:27
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My procrastination in upgrading an Atari 400 membrane keyboard was rewarded when I stumbled onto some XL Series keyboards that found their way to the local Radio Shack. Price: $5. Jim
More on 800XL Keyboards at Radio Shack
Author: J.STEKAS
Date: Fri, 16 Aug 1985 17:42
Date: Fri, 16 Aug 1985 17:42
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First, the keyboards are from the 1200XL and not the 800XL as I said. Second, the TI keyboards once offered were gobbled up as soon as they hit the shelves. If you want an Atari keyboard I suggest polling the RS stores in your area by telephone ASAP. The keyboard uses a membrane switching matrix actuated by mechanical keys. The major difference with the 400 keyboard is that the 1200XL KB includes the 2 MOS chips that encode the keystrokes. On the 400, the chips are on the motherboard. Interfacing requires removing the chips from the 1200 KB and bringing the proper connections out with a 22 wire cable which can plug into the KB socket on the 400. The Atari Technical Reference shows the mapping between the keyboard socket and encoding chip pins. Comparing foil patterns is a more difficult way of figuring things out. Good Luck - Jim
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