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Tandy 1000 Technical Reference Manual

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IBM
PC
IBM
PCjr
TANDY
l~~~
~ ~
8
~
DMA PAGE
REG.
(NOT USED)
DMA PAGE REG. (NOT USED)
I
(CH 2)
I
(CH 2)
2
(CH 3)
~
(CH3)
3
(CH~,
1)
DMA PAGE REG.
(CH~,
I)
4
REPEATED
THRU
~~9F
S
6
7
8
9
A
B
C
D
E
~ ~
8 F
DMA
PAGE
REG.
AI~
-
AIS
NOT DECODED NO DMA FUNCTION. CHIP SELECT FROM A3 -
AIS
CHIP SELECT
FROM
AS
- A9
A~,AI
TO IC.
A~,
Al
TO
IC
A2, A3,
A4=
X
ADDRESS RANGE:
~~8~
-
~~9F
ASSIGNED ADDRESS:
~~8~
-
~~83.
DMA OPTIONAL ON TANDY
l~~~.
o
o
o

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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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