Manual

Chapter 3
Installation
3-3
5. To change the setting, pull the jumper off the pins and reposition it on
the pins for the interrupt line you desire. See Table 3.A for interrupt
request line definitions.
Table 3.A
Interrupt
Request Line Definitions
Interrupt Line: Explanation:
IRQ3 Default setting. Conflicts with COM2 port on machines so equipped.
Conflicts with the KTP card.
IRQ5 This setting conflicts with the hard disk controller when the card is
used in an IBMXT or AT clone. This setting would also conflict with
the LPT2 port on machine so equipped.
IRQ10 Not available on IBMXT. Not assigned on 1784T50 or IBMAT, but
may conflict with 3rd party boards.
IRQ12 Not available on IBMXT. Not assigned on 1784T50 or IBMAT, but
may conflict with 3rd party boards.
6. Write your application software to use the newly selected interrupt
request line setting.
Software Interrupt
The host receives interrupts from the scanner through the selected line
(IRQ3, IRQ5, IRQ10, or IRQ12). Table 3.B lists the software interrupt
vectors.
Table 3.B
Software
Interrupt V ectors
Interrupt Line: Software Interrupt Vector:
IRQ3 0Bh
IRQ5 0Dh
IRQ10 072h
IRQ12 074h
Results are unpredictable if you have any other hardware that uses
interrupt IRQ3, IRQ5, IRQ10, or IRQ12 (It is likely that the other software
simply ceases functioning while your scanner 0 interface program is
running, but we cannot guarantee that this is the only result).
The scanner driver routines also use the timer follow–on interrupt, number
1Ch. After its own processing, the scanner code will call any previously
set follow–ons to interrupt 1Ch. If the other software is taking too great a
portion of system resources, your scanner application program may not
operate correctly.