Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!tut.cis.ohio-state.edu!ucbvax!GALLUA.BITNET!11TSTARK
From: 11TSTARK@GALLUA.BITNET (Timothy Stark)
Newsgroups: comp.sys.amiga.tech
Subject: RS232: Connect null modem cable between Amiga 500 and TI99/4A
Message-ID: <9001061902.AA03244@ucbvax.Berkeley.EDU>
Date: 6 Jan 90 19:02:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 44

Hello users:

     I want transfer my files between my Amiga 500 and TI-99/4A computers.
I talked with guys at GEnie online service and they gave me information.
I tried it with null modem adapter or straight RS232 cables from both
stores (Electronic Boutique and Radio Shack) but they do not work.
I tried it with a lamp cord (connects to pin 2 and 3 on both TI and
Amiga connectors in straight) but it still do not work. Does anyone
know any good IBM/Amiga-to-TI null modem (RS232) cable that will work
very well?? Can you help me? Thanks!!

       Amiga 500 Connector                  TI-99/4A RS232 Connector

             1  GND Ground                     1  GND Ground
             2  TXD Transmit Data              2  RD  Receive Data
             3  RXD Receive Data               3  TX  Transmit Data
             4  RTS Request to send            5  CTS Clear to send
             5  CTS Clear to send              6  DSR Data Set Ready
             6  DSR Data Set Ready             7  GND Ground
             7  GND Ground                     8  DCD Detect Carrier
             8  DCD Carrier Detect             20 DTR Data Terminal Ready
             9  +12 12 volts
             10 -12 12 volts
             11 AUDO Audio output
             18 AUDI Audio input
             20 DTR  Data Terminal Ready
             22 RI   Ring Indicator

My TI-RS232 Manual says that DTR is require for operation why that it
refuse to work!!

I will consider to connect null modem cable with 4 wires: RXD, TXD, DSR,
and DTR. Perhaps It will work well.

Thanks!!

-- Tim Stark

* This posting have been posted to Usenet comp.sys.amiga.tech.

Timothy Stark          Bitnet: 11tstark@gallua.bitnet People/Link: T.STARK
Gallaudet University   Internet: 11tstark@gallux.gallaudet.edu GEnie: T.STARK1
P.O. Box 1453, 800 Florida Ave., N.E., Washington, DC 20002
"Gallaudet University is the only university for the deaf in the world."