2 notational conventions – Intel 386 User Manual

Page 30

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1-3

GUIDE TO THIS MANUAL

1.2

NOTATIONAL CONVENTIONS

The following notations are used throughout this manual.

#

The pound symbol (#) appended to a signal name indicates that the signal
is active low.

Variables

Variables are shown in italics. Variables must be replaced with correct
values.

New Terms

New terms are shown in italics. See the Glossary for a brief definition of
commonly used terms.

Instructions

Instruction mnemonics are shown in upper case. When you are
programming, instructions are not case sensitive. You may use either
upper or lower case.

Numbers

Hexadecimal numbers are represented by a string of hexadecimal digits
followed by the character H. A zero prefix is added to numbers that begin
with A through F. (For example, FF is shown as 0FFH.) Decimal and
binary numbers are represented by their customary notations. (That is,
255 is a decimal number and 1111 1111 is a binary number. In some cases,
the letter B is added for clarity.)

Units of Measure

The following abbreviations are used to represent units of measure:

A

amps, amperes

Gbyte

gigabytes

Kbyte

kilobytes

K

kilo-ohms

mA

milliamps, milliamperes

Mbyte

megabytes

MHz

megahertz

ms

milliseconds

mW

milliwatts

ns

nanoseconds

pF

picofarads

W

watts

V

volts

µ

A

microamps, microamperes

µ

F

microfarads

µ

s

microseconds

µ

W

microwatts

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