Intermec 6200 Reference Guide

R

The register interfaces to the APM BIOS functions are described on the following

pages.  Functions are accessed through INT 15h.  The carry (CY) flag is set and

an error code is placed in the AH register when an error condition is detected.

The carry flag is reset to zero upon return from successful calls.  The AH register

contents depend on the particular call.
This interface has a convention for identifying a device class and units within

that class to allow for direct control of devices.  For example, all disk devices are

a class and the units are the physical unit numbers.  The device ID parameter is

passed in a wordĆlength register (BX), where BH is the device class and BL is the

device unit.  The APM Power Device Class/Subclass IDs are defined as follows:

BX = Power device ID

XXh = Unit number (0 based)

FFh = All devices in this class

Table 4Ć14 

ID (Hex)

Description

00XX

System

    00

APM BIOS

    01

All devices powerĆmanaged by the APM BIOS

0100

Display

0200

Secondary storage (PC Card)

03XX

Parallel ports

0400

RS232 serial port

0401

RS485 serial port

0500

Ethernet network adapters

0600

PC Card socket A

0601

PC Card socket B

0700ćDFFF (reserved)

E000ćEFFF OEMĆdefined power device IDs

E000

POD1

E001

POD2

E100

Digitizer

E200

Backlight

E300

Heater

E400

SWV+

E500

Load Shed

E600

Condition Cycle

F000ćFFFF (reserved)