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Utility to View / Change IRQ settings on Dell OPtiplex GX1 using running MS DOS

Hi,
I am installing an legacy application on a Dell Optiplex GX1 small form factor machine. The Operating system is MS DOS. The application has certain IRQ built in to it to access the COM ports.

Serial Port 1:3F8, IRQ4 and Paralell port 1: 378, IRQ 5 DMA1

Earlier we used to install this Application on Compaq Dexpro MMX machines. These are now just too old and need to be replaced.
It was easier on Comapq machines to access the BIOS settings using the F10 function. But I cant find  such an utility on Dell machines or maybe  Iam not looking into right places.
Can anybody please direct to find an utility which will let me peek into the IRQ assignments of different On-board and Add-on devices on Dell optiplex GX1 me..?

Many thankx.
FTS
DesktopsPC

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fieldtechsupport

8/22/2022 - Mon
Gary Case

F2 will get you into the System Setup screens of the BIOS.
fieldtechsupport

ASKER
Yes Gary,
F2 does take me to setup but  it doesnt allow me to see which on board and add-on devices are assigned which IRQ 's ..
Maybe some experts in this community might  know some utilities or Dell stuff that can help me see which on board and add-on devices are assigned which IRQ 's ..
Apparently there is some kind of IRQ assign ment conflict...thats making My DOS application return an " Serial ports not accessible, check the IRQ assignments of your system"....messaage.
Everything just works fine if I install this Application on a Compaq Machine..

Many thanks in advance..
ASKER CERTIFIED SOLUTION
Gary Case

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fieldtechsupport

ASKER
thanks 4 da info gary,
after tweaking around stuff that can be tweaked, I still could not get the  ports problem solved...the Serial ports work fine but the application just hangs when accessing the LPT 1, definetly DELL BIOS is one real piece of non-custamisable crap....
So I gave a Try on the Compaq EN series machine, although not  ultra modern.. its decent enough for DOS , it has a BIOS that allows a lot of intrupts to be swapped around.
the Application Runs smoothly.....maybe this stuff is what still keeps these machines around...plus the HP site was really helpfull in getting the required ROMPAQS
To hell with DELL...
Your help has saved me hundreds of hours of internet surfing.
fblack61