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This article describes a technique in which adapters can define an adapter description program (ADP) to be executed by a set configuration program.
English (United States)
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Adapter Description Program Interface to Configure Adapters on Personal
Computer Systems That Store Their Configuration Information in Non-
This article describes a technique in which adapters can define an adapter
description program (ADP) to be executed by a set configuration program.
The set configuration program is a program that is used to con
figure the system and installed adapters by allocating resources to them and
storing their programmable option select (POS) register information in
complementary metal-oxide semiconductor (CMOS) random- access memory
(RAM). The adapter indicates to the set configuration program that it has an
ADP by including a certain statement in the adapter description file (ADF). ADFs
are files that contain configuration information about the adapter for the set
configuration program to use. Each unique adapter in the system must have an
ADF in order to be configured.
ADPs are loaded and executed at different times by the set configuration
program during the system configuration process. Commands and data are
passed to the ADPs from the set configuration program by making initial values
in a parameter block and putting a segment and offset pointer to the parameter
block on the stack before the ADP is called. The ADP can make initial values or
use information defined in the parameter block. A defined set of functions also
exists that the ADP can use to make requests to the set configuration program.
Included in the functions available to the ADP is the ability to request an area
of memory to be assigned to the associated adapter and used as non-system
memory. The ADP can also configure system memory by updating the top of
memory value(s) in the parameter block that was passed by the set configuration
program. The ADP must follow certain design specifications to properly interface
to the set configuration program.
A defined set of functions and commands will be supported by a set
configuration program that contains support for ADPs. Functions may be added
as requirements from new adapters, and systems are introduced.