Technical information

OPTO DIO Reference OPTO OUT48
to selects which OUT48 signal generates the interrupt, the IRQ
jumper selects which PC interrupt is asserted and so which
software interrupt service routine is called.
Figure 4-7. The IRQ Jumper Block._______________________________
11111
54210234567 NORMAL USE OF INTERRUPT.________________________
IRQ2 EGA/VGA GRAPHICS CARD, Usually Free
Used by only very few graphics cards.
IRQ3 COM 2- COM 8.
IRQ4 COM 1.
IRQ5 PRINTER PORT#2 OK for DOS & Windows
Avoid for OS/2, Windows NT & Novell
IRQ6 FLOPPY DISK DRIVE, AVOID!.
IRQ7 PRINTER PORT#1 OK for DOS & Windows
Avoid for OS/2, Windows NT & Novell
IRQ10 Usually Free
IRQ11 Usually Free
IRQ12 POINTING DEVICE, Usually Free
Free when mouse is on a COM port.
IRQ15 Usually Free
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