Supra Commodore RS-232 Modem Interface Manual

INTRODUCTION
Congratulations on purchasing your Commodore RS-232 Modem Interface! With this interface you will
no longer be restricted to Commodore-only modems but can now use any standard RS-232 modem
available (including the high-performance SupraModem 2400™) with your Commodore Vic20™, C64™,
or C128™.
HOOKUP
With the power off, plug your modem interface (with the label side up) into your Commodore user port.
The interface is keyed so it can only be inserted the correct way. If your interface does not plug in easily,
check to make sure that it is "keyed" properly and you are inserting it into the user port. (As you face the
keyboard, the user port is on the left side of the rear of your computer.) Next, connect the RS-232 end to
your modem. Installation is now complete and you may proceed to connect your modem as explained in
your modem manual.
GOING "ON LINE"
(Note— We are assuming your new modem is "Hayes™ T A T ' command compatible. If you are not sure if
it is, check your modem manual.)
To test your equipment, we suggest that you load in your favorite terminal software and enter the terminal
mode. From the terminal mode, type in the command AT in upper case, and then press the carriage
return key. Your modem should respond with OK or something similar. If it doesn't, try these ideas:
• Make sure your modem is "HayesTAT" compatible or at least an intelligent modem.
• Check your modem manual to see if it requires a different command or if it returns a number
instead of OK.
• Check all connections, and make double sure that your modem and the modem software are at
the same baud rate.
Now that you are at least communicating with your modem, let's try communicating with another com­
puter. While in the terminal mode, type ATDTxxx-xxxx, where the x 's are replaced with the number of a
local BBS or another modem awaiting a call. You may also use ATDP in place of ATDT. (The AT
represents ATTENTION, the DT means DIAL TONE, and the DP means DIAL PULSE.) You should hear
your modem dial or see some lights flicker on and off. This is your modem's way of telling you it is
dialing. A moment or two later a prompt may appear from the host computer or, more likely, you will have
to hit the return key once or twice to let the host computer know that you are awaiting a "log-on" se­
quence.
If you have made it this far, you are well on your way to exploring the vast opportunities which await you
in telecommunications. Good luck, and enjoy your new modem!
WARRANTY
Supra Corporation warrants the Commodore RS-232 Modem Interface to be free from defects in
material and workmanship for a period of 90 days from date of original purchase. If any parts or equip­
ment become defective through normal use within this period, Supra will repair or replace them without
charge. Any product deemed to be defective through accident, misuse, or neglect will be repaired at
current shop charges for materials and labor. Supra Corporation does not assume any liability for any
consequential damages caused by the use of this product.
Supra Corporation
7101 Supra Drive S.W.
Albany, OR 97321 USA
TECHNICAL SUPPORT: (503) 967-2440