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Tandy 1000 Technical Reference Manual

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Tandy 1000
3-1.
CONSTRUCTION
AND
FUNCrION
3-1-1.
General
Block
Diagram
Technical Reference Manual
Read/
write
circuit
READ
DATA
SIDE
ONE
SELECT
WRITE
DATA
DRIVE
SELECT
0"-3
WRITE
GATE
MOTOR
ON
STEP
DIRECI'ION
SELECI'
IN
USE
TRACK
00
INDEX
READY
WRITE
PROTECI'
+l2V,+SV,OV
Control
circuit
sensor
sensor
LED
LED
(Fig.30l)
General
block
diagram
- 301 -

Table of Contents

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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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