Preface
This
Technical Information Manual provides information about the IBM PC 100 (Type 6260) and the IBM
PC 300 (Type 6560). It is intended for developers who want to provide hardware and software products to
operate with these IBM computers and provides a more in-depth view of how the computers work. Users
of this publication should have an understanding of computer architecture and programming concepts.
Related Publications
In addition to this manual, the following IBM publications provide information related to the operation of the
PC 100 and PC 300. To order publications in the U.S. and Puerto Rico, call 1-800-879-2755. In other
countries, contact an IBM reseller or an IBM marketing representative.
Using Your Personal Computer – PC 100
1
Hardware Maintenance Manual – PC 100
1
Using Your Personal Computer – PC 300
Installing Options in Your Personal Computer – PC 300
Understanding Your Personal Computer – PC 300
Hardware Maintenance Manual – PC 300
Manual Style
Attention: The term
reserved describes certain signals, bits, and registers that should not be changed.
Use of reserved areas can cause compatibility problems, loss of data, or permanent damage to the
hardware. When the contents of a register are changed, the state of the reserved bits must be preserved.
When possible, read the register first and change only the bits that must be changed.
In this manual, signals are represented in a small, all-capital-letter format (
-ACK
). A minus sign in front of
the signal indicates that the signal is active low. No sign in front of the signal indicates that the signal is
active high.
In this manual, use of the letter “h” indicates a hexadecimal number. Also, when numerical modifiers such
as “K”, “M” and “G“ are used, they typically indicate powers of 2, not powers of 10 (unless expressing hard
disk storage capacity). For example, 1 KB equals 1 024 bytes (2
10
), 1 MB equals 1 048 576 bytes (2
20
),
and 1 GB equals 1 073 741 824 bytes (2
30
).
When expressing storage capacity, MB equals 1 000 KB (1 024 000). The value is determined by counting
the number of sectors and assuming that every two sectors equals 1 KB.
The actual storage capacity available to the user can vary, depending on the operating system and other
system requirements.
1
Not available in the U.S. and Puerto Rico.
vi
Copyright IBM Corp. August 1996
Summary of Contents for PC 100
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