[net.micro.atari8] Using Terminal Software without a modem

JRCooper.PA@XEROX.COM (04/12/86)

I need some help in utilizing some of the features of a terminal
software package without having a Modem attached to the computer.

I have recently purchased a terminal package that is supposed to allow
me to convert data files from another related software package into a
DOS readable format.  Then, once the file is DOS accessable, the file
can be sent over the phone lines.  The trouble is, I have a MPP 1000c
type modem* with it's own terminal package in cartridge form and the new
software wants to see a Modem at the serial port before it will show
even the first configuration menu.

>>>>My question is:   What constitutes a "MODEM ERROR" in the Atari
Computers, and how might I be able to fool the machine (an 800 or a
130XE) into believing that a Modem is properly attached to the serial
port.

Also, would I be able to use the MPP Modem with an adaptor cable (does
anybody know what the pin-out connections are for MPP->Joystick
Interface?) to hook it onto the serial port?


*the MPP modem communicates via the joystick port and allows any DOS
accessable file to be transferred.

If it is of any use, the Terminal Program that I am trying to use is
called MidiCom and is manufactured by Hybrid Arts, Inc. of Los Angeles.
The Data files are written by other Hybrid Arts software packages that
Catalog and store information recieved from MIDI music synthesizers. 

I appreciate any help anybody can offer in getting my files out onto
phone lines.  If all else fails I will have to break down and buy a
cheap modem somewhere.  (but that is what I am trying to avoid.....)

Thanks in advance,

Jim Cooper <JRCooper.pa@Xerox.Com>   

ekijak@ARDC.ARPA ("Edmund S. Kijak", POINT) (04/14/86)

To: JRCooper.PA@Xerox.COM

The software is probably checking one of the pins on the serial port to see
if the modem (that's supposed to be attached) is ready. You may be able to fool
it by grounding the proper pin. I don't know which pin - you'd have to get the
pinouts of the serial connector and try each pin - but don't ground the +5 volt
and +12 volt power supply pins! (You need the pinouts to see which pins can be
grounded without damage). (I'm not sure, maybe the pin has to be held high - at
plus 5 volts thru a pullup resistor, but most of the time if the pin is not
connected to anything it will automatically go to plus 5 volts, and that's why
I said that grounding is probably required.  You also need the pinout to see
which pins are the ground pins so you can ground the other pin of your choice).