Toshiba 650CT Maintenance Manual page 119

8. I/O ports
This option controls settings for serial and parallel ports and the sound system. It
also controls the setting for the joystick on the optional Desk Station V Plus.
NOTE: Do not assign the same interrupt request level and I/O address to the
serial port and PC card.
(a) Serial Port
This option allows you to set the COM level for the serial port. The serial port
interrupt request level (IRQ) and I/O port base address for each COM level are
shown below:
(b) Built-in Modem
This option allows you to set the COM level for the Modem port. The Modem
port interrupt request level (IRQ) and I/O port base address for each COM
level are shown below:
650CT
COM level Interrupt level
COM1 4
COM2 3
COM3 4
COM3 5
COM3 7
COM4 3
COM4 5
COM4 7
Not used
Others
NOTE: If the setting for the serial port is the same as that for the
infrared or Modem port, the infrared or Modem port is automati-
cally set to disabled.
NOTE: If an internal modem (optional in some markets) is not
installed, this selection does not appear.
I/O address
3F8H (Serial port default)
2F8H
3E8H
3E8H
3E8H
2E8H
2E8H
2E8H
(Disables port)
(Other settings are made automatically
by the Plug-and-Play operating
system.)
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