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From: ezf@bbncc5.UUCP (Ed Frankenberry)
Newsgroups: net.micro.ti
Subject: TI 99/4a Logo II (requires 32k RAM)
Message-ID: <3257@bbncc5.UUCP>
Date: Sat, 3-May-86 10:36:51 EDT
Article-I.D.: bbncc5.3257
Posted: Sat May  3 10:36:51 1986
Date-Received: Tue, 6-May-86 07:04:39 EDT
Organization: Bolt Beranek and Newman, Cambridge, MA
Lines: 16
Keywords: memory expansion

I finally located a Logo II cartridge for the home computer.  Trouble
is, I can't even get started using it with only 16k memory (the title
screen says "check system").  Looks like I'll need to build a 32k
memory expansion board.  Before reinventing the wheel though, has
anyone else homebrewed some add-on memory?  I haven't seen any cook-
books on how to interface with the 99/4a "bus", but maybe someone else
has.  Have there been any articles on expanding a bare-bones system?
Are schematics still available for the TI expansion box and cards?
Even the TI literature (9900 Family Architecture) seems to be
out of print and discontinued.

	Thanks,
	Ed Frankenberry

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