Re: A400 RAM upgrade

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3 total messages Started by Marshall D. Abrams Fri, 11 Oct 1985 14:00

#1197

Author: Marshall D. Abrams
Date: Fri, 11 Oct 1985 14:00

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I believe it is a 1200XL keyboard. It is not compatible as-is with your
400. Probably you could strip off the components and wire your own
matrix. I didn't find that to be too difficult, but I started with a
clean keyboard.
 
- Marshall D. Abrams, phone: (703) 883-6938
   The MITRE Corporation, 1820 Dolley Madison Blvd.
   Mail Stop W458, Mc Lean, VA   22102

Re: A400 RAM upgrade

#1237

Author: J.STEKAS
Date: Mon, 14 Oct 1985 12:38

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> I believe it is a 1200XL keyboard. It is not compatible as-is with your
> 400. Probably you could strip off the components and wire your own
> matrix. I didn't find that to be too difficult, but I started with a
> clean keyboard.       - Marshall D. Abrams

In fact, the matrix on the 1200XL keyboard is the same as for the 400.
Adapting it for the 400 requires removing the 2 ICs on the board and
soldering jumpers from the (now) empty holes to the keyboard socket
in the 400.  One can figure out how to do this by reverse engineering
the membrane keyboard or via the Tech. Ref. Manual.
							-Jim

Re: Atari 400 RAM/keyboard upgrade

#1310

Author: Robert Plamondon
Date: Mon, 21 Oct 1985 17:20

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Stores around here (Silicon Valley) are closing out Atari 800XLs at
$69.95, and some ads in Antic have Atari 1200XLs at the same price.
At these prices, it would probably be better to get a new Atari (with
more RAM and a better keyboard) than upgrade the 400.

One company is giving a free atari 1200 with every purchase of an
inexpensive dot-matrix printer!
-- 

		Robert Plamondon
		{turtlevax, resonex, cae780}!weitek!robert

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