Toshiba T5200 - Page 74

You need to set the optional port IRQ level according to the I/O
address or interrupt level of the modem card that is specified by
the communication software to be used. For example, set the serial
port interrupt levels as shown below when the communications
software assumes 2F8H as the I/O address of the modem.
Serial A IRQ level = 4
Serial B IRQ level = 5
Toshiba modem IRQ level = 3
or
Serial A IRQ level = 4
Serial B IRQ level = -
Toshiba modem IRQ level = 3
Example 3: When using a modem card for the IBM PC
Check the I/O address of the modem card and make sure that it does
not conflict with that of the serial A and B. For example, set the
serial port interrupt levels as shown below when the I/O address of
the modem card is 2F8H.
Serial A IRQ level = 4
Serial B IRQ level = 5
Toshiba modem IRQ level = -
6. Bus Speed
This option selects the system bus speed. Some option boards are
dependent on the system bus speed.
-High: High selects the maximum CPU speed and the maximum bus
speed.
-Normal: Normal selects the maximum CPU speed and the low bus
speed. This setting makes the T5200 bus compatible with the IBM PC
AT bus.
-Low: Low selects the low CPU speed and the low bus speed. This
setting makes the T5200 bus and CPU speed compatible with the IBM
PC AT.
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DOC:MAINTENANCE MANUAL
MODEL:T5200
MODEL:T5200C
CHAP:3 TESTS AND DIAGNOSTICS
SECT:3.25, WIRING DIAGRAM
DOC_ID:3.25 T5200
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