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From: mitch@noscvax.UUCP (Ray Mitchell)
Newsgroups: net.micro,net.micro.ti
Subject: Printer for TI-99A Computer
Message-ID: <232@noscvax.UUCP>
Date: Wed, 26-Feb-86 15:00:37 EST
Article-I.D.: noscvax.232
Posted: Wed Feb 26 15:00:37 1986
Date-Received: Fri, 28-Feb-86 22:12:03 EST
Organization: Naval Ocean Systems Center, San Diego
Lines: 22
Xref: watmath net.micro:13918 net.micro.ti:168

I am interested in interfacing an Epson printer to a TI-99A
computer. I have the technical manual for the computer but
timing diagrams and address maps are not sufficient
to do the interface. I understand that the printer connects
to the computer I/O port and must somehow intelligently respond
to a poll from the computer before the computer knows a printer
is connected. I need a complete description of what I/O connector
signals are used and what type of protocol is used. I have
talked to TI on this but they refuse to release the information.
I would also like to know what type of keyboard keyin is required
to send something to the printer.

Any additional information on interface requirements for a disc,
the RS-232 interface, and the rest would be appreciated.

				  Thanks,

				  Ray Mitchell
				  NOSC code 911


:w