Intermec 6200 Reference Guide

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This paragraph contains a detailed listing of all of the interrupts within the 4000

Series interfaces that are supported for 6000 Series applications.  These

interrupts are organized by interrupt number first, then by subfunction.  See the

Interrupt Index (at the end of this publication) for an alphabetically organized

index to each of the interrupts.
A reference token has been included at the beginning of each interrupt definition

to assist you in determining the application (or applications) that supports that

particular interrupt.  This reference token represents either the BIOS or the

application that handles the defined interrupt.  That application could be:

4000APM.EXE, NPOWER.EXE, FONTMAP.EXE, NORAPM.EXE,

NGENMOD.SYS, NGENWAN.SYS, or one of the pen drivers: 62MOUSE.COM,

63MOUSE.COM.
In some cases, there may be more than one token.  If these tokens are listed

together at the top of the interrupt definition, then the same definition applies

for both.  In some cases, there may be two tokens, but each token has its own

definition, which means each application supporting that interrupt has different

expectations for the interrupt.
The following table shows a list of reference tokens used in the interrupt

definitions throughout the rest of this section.  Each reference token in the

leftĆhand column represents the application listed in the center column:

Reference Token BIOS or Application Program Purpose

BIOS

BIOS

BIOS

FONTMAP

FONTMAP.EXE

Video

4000API

4000API.EXE

4000 Series Compatibility

NORAPM

NORAPM.EXE

APM BIOS

NPOWER

NPOWER.EXE

APM BIOS

NGENMOD

NGENMOD.SYS

PC Card Modem

NGENWAN

NGENWAN.SYS

Wide Area Network

MOUSE

62MOUSE.COM, 63MOUSE.COM Pen Driver

The system provides a periodic system timer tick and issues INT 08h at every

timer tick.  The interrupt occurs approximately every 55 milliseconds.  This rate

is close to 65535 ticks per hour.
The interrupt service routine maintains the count of interrupts from powerĆon at

BIOS data location 0x40:0x6C.  After 24 hours of operation, location 0x40:0x7C

is nonzero when the counter overflows to the next day.  The number of ticks in 24

hours is 0x1800B0.
The system timer interrupt issues a call to a userĆsupplied routine through

interrupt 0x1C at every interrupt.