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Tandy 1000 Technical Reference Manual

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Tandy 1000
Technical Reference Manual
8253/8253·5
PROGRAMMABLE
INTERVAL
TIMER
•
MCS·85™
Compatible 8253·5
• 3 Independent 16·Blt Counters
•
DC
to 2 MHz
• Programmable Counter Modes
• Count Binary or
BCD
• Single + 5V Supply
• Available
in
EXPRESS
-Standard
Temperature Range
-Extended
Temperature Range
The Intel'" 8253 is a
programmable
counter/timer
chip
designed
for
use as all
Intel
microcomputer
peripheral. It uses
nMOS
technology
with
a
single
+5V
supply
and is packaged in a 24-pin
plastic
DIP.
It
is organized as 3
independent
16-bit
counters,
each
with
a
count
rate
of
up
to
2 MHz.
All
modes
of
operation
are soft-
ware
programmable.
Figure
1.
Block Diagram
Figure
2.
Pin Configuration
"INTEL CORPORATION, 1982
6-139
A,FN-OC74~C

Table of Contents

Other manuals for Tandy 1000

Preview: User Guide
User Guide337 pages
Preview: Programmer's Reference Guide
Programmer's Reference Guide251 pages
Preview: Basic Reference Manual
Basic Reference Manual411 pages
Preview: Owner's Manual
Owner's Manual46 pages

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Tandy 1000 Specifications

General IconGeneral
ProcessorIntel 8088
Processor Speed4.77 MHz
RAM128 KB (expandable to 640 KB)
Operating SystemMS-DOS 2.11
ManufacturerTandy Corporation
Release Year1984
StorageSingle or double 5.25" floppy disk drive (360 KB), optional hard drive
SoundTandy 3-voice sound
PortsParallel, Serial
GraphicsCGA (Color Graphics Adapter)
Graphics Modes320x200, 640x200

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