Using Td-225 System Resources - Intergraph TD-22x System Manual

Using TD-225 System Resources

Most ISA devices installed in the system require you to reserve an IRQ. PCI devices also
need to use an IRQ, but since they share system resources they can use the same IRQ. At
least one IRQ must be left unassigned, for use with any PCI devices installed in your system.
The system has a limited number of open IRQs. To install more ISA devices than you have
open IRQs, you must disable one unused system port for each excess ISA device, unless the
device does not require an IRQ.
To reserve an IRQ for an installed device:
1. Restart the system and start the BIOS Setup program.
2. On the PCI/PnP screen, select the IRQ you want to reserve.
3. Change the setting for the selected IRQ to ISA/EISA.
4. Save the changes and exit from the BIOS Setup program.
The following expansion cards require specific system resource settings, as noted (all are
ISA devices except for the Ensoniq PCI Sound Card):
Expansion card
(installed in the system)
First modem (Windows NT)
Second modem (Windows NT)
First parallel printer adapter
Second parallel printer adapter
3Com network adapter
On a system running Windows 95, ensure the following system resources are set as noted:
System resource
Plug and Play operating system
Serial port 1 COM1
Serial port 2 COM2
Parallel port LPT1
Resources BIOS Setup
required parameter settings
COM3, IRQ 4 Disable serial port 1 (COM1);
reserve IRQ 4
COM2, IRQ 3 Disable serial port 2 (COM2);
reserve IRQ 3
Base address 278 None
Base address 3BC None
IRQ 10 (default) Reserve IRQ 10
BIOS Setup parameter settings
On the PCI/PnP screen, set Plug and Play Aware O/S
to Yes
Reserve IRQ 4 (if port is to be used)
Reserve IRQ 3 (if port is to be used)
Reserve IRQ 7 (if port is to be used)
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