wg@alux2.ATT.COM (Bill Gieske) (02/11/89)
I have a Leading Edge Model D; I am trying to configure it such that I can
run Personal Composer on it. My problem is sorting out the interrupts now
used, and insuring all necessary hardware can be accommodated. My configura-
tion now is:
EGA card - using int 2 (I'm not 100% sure)
including a mouse port - using int 3
including a printer port (LPT1) - using int 5 (or 7?)
Built-in ports:
Parallel (LPT2) - using int 7 (or 5)
Serial port (COM1) - using int 4
System has disk controller in one expansion slot, using int ??
I also have a joystick card, using int ??
Personal Composer requires EGA, and should be used with a mouse. Anyway, the
mouse stays. The Roland MPU-IPC card also uses interrupt 2. Neither the EGA
card nor the MPU card can be changed to use a different interrupt. Something
must go.
I can get a different card, but still need to know what's using which inter-
rupts to insure the card I get can be configured to use an free interrupt.
What is using int 1 and int 6. Can I go higher than 7 (the Roland card would
use int 9 if my XT were an AT)?
I would like not to loose what I have now connected, including the two printers.
One option would be to put the two printers on a T-switch and thus free the in-
terrupt used by LPT2 (is it 5 or 7?). Or, I'll not be using the modem on COM1
when using Personal Composer, so could wire a switch to disable the serial port
on int 4 (that can be done) and another it enable the MPU card (if that's pos-
sible). And, can this be done on-the-fly, or must I reboot each time I toggle?
If so, the switch on the printers would be better.
Answers to some or all of the above will be greatly appreciated!!
Thanks,
Bill Gieske
wg@att!alux2