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Tandy 1000 Technical Reference Manual

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Tandy 1000
Address
3
0040
0041
0042
0043
0044
0045
0046
0047
0048
0049
004A
0048
004C
004D
004E
004F
Address
4
0060
0061
0062
0063
0064
0065
0066
0067
0068
0069
006A
0068
006C
006D
006E
006F
Technical Reference Manual
Description
8253-5 Timer
8253-5 Timer
8253-5 Timer
8253-5 Timer
8253-5 Timer
8253-5 Timer
8253-5 Timer
8253-5 Timer
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Description
8255A-5
PPI
8255A-5
PPI
8255A-5
PPI
8255A-5
PPI
8255A-5
PPI
8255A-5
PPI
8255A-5
PPI
8255A-5
PPI
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
3.
A3
- A15 are used to generate the chip select for the 8253-A.
AO
is
decoded directly by the
8253-A. The assigned addresses are 0040
- 0043.
4.
A3
- A15 are used to generate the chip select for the 8255A-5. A1 and
AO
are decoded directly
by the 8255A-5. The assigned addresses are 0060
- 0063.
Detailed Memory
Map--Continued
61

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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