From: utzoo!decvax!decwrl!sun!megatest!fortune!hpda!hplabs!hao!menlo70!nsc!rogers Newsgroups: net.micro Title: Homebrew T.I. Intfc. Article-I.D.: nsc.277 Posted: Mon Apr 4 16:41:22 1983 Received: Wed Apr 6 02:44:31 1983 Expires: Mon Apr 18 16:41:22 1983 Subject: Homebrew T.I. 99/4A to Z80/8080 Interface I recently bought a T.I. 99/4A computer and would like to connect it to a Z-80/8080 based system I am building. Does anyone have any (technical) info/advice/pointers-to-info that they would send to me? My design constraints are: 1. Cost/simplicity: The interface must be as inexpensive/simple as it can be yet also do the job. 2. The interface must be transparent to the T.I. BASIC in the machine; I have no R.O.M. cartidges(yet). 3. I would like to use the expansion port on the right side of the cab- inet. 4. The interface may be serial or parallel. 5. Any T.I. BASIC patches that may be required would be very much ap- preciated. 6. This is intended to be a temporary state of affairs until I can get the money together for the Serial/Parallel I/O board. I am a "hardware type" with little programming experience(8080 Assembler & learning BASIC); hence the programming requirements. Thanx, Nessus