Toshiba M1 manual COM level

3.29 SETUP 3 Tests and Diagnostics

9.I/O ports

This option controls settings for the parallel port.

NOTE: Do not assign the same interrupt request level and I/O address to the serial port and PC card.

(a)Serial

Use this option 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 is shown below:

COM level	Interrupt level	I/O address
COM1	4	3F8H	(Serial port default)
COM2	3	2F8H
COM3	4	3E8H
COM3	5	3E8H
COM3	7	3E8H
COM4	3	2E8H
COM4	5	2E8H
COM4	7	2E8H
Not Used	Disables port

(b)Parallel

This option sets the interrupt request level (IRQ) and I/O port base address for the parallel port. When the Printer Port Mode is set to Std. Bi-direct, the options are:

LPT setting	Interrupt level	I/O address
LPT 1	7	378H
LPT 2	5	278H
LPT 3	7	3BCH
Not Used	Disables port

TECRA M1 Maintenance Manual (960-436) 3-91