IBM 1000-90 ユーザーズマニュアル

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EQUIP.EXE
CONFIGURED - lists baud rate, data bits, stop bits, and parity.
RTS (4) - Ready To Send status, transmitted on modem cable
line 4.
CTS (5) - Clear To Send status, transmitted on modem cable
line 5.
DSR (6) - Data Set Ready status, transmitted on modem cable
line 6.
CD (8) - Carrier Detect status, transmitted on modem cable line 8.
DTR (20) - Data Terminal Ready, transmitted on modem cable
line 20.
If the baud rate reads -1, check the cable to make sure that it is the
proper one for your instrument (DTE or DCE).  Also check to see
that you are connected to the proper serial port on your computer.
Lastly, check the RS-232C parameters in your instrument (baud rate,
data bits, etc.) to make sure that they are set properly for the
configuration set in the COMM program.