Tandy 1000 Technical Reference Manual

IBM PC IBM PCjr
TANDY l~~~
~~2~
8259A INTERRUPT CONTROLLER 8259A INTERRUPT CONTROLLER
8259A INTERRUPT CONTROLLER
~~2I
~~22
~~23
~~24
~~25
~~26
~~27
8259A INTERRUPT CONTROLLER 8259A INTERRUPT CONTROLLER
~~28
~~29
~~2A
~~2B SAME AS ~~2~ - ~~27
~~2C
~~2D
~~2E
~~2F
8259A INTERRUPT CONTROLLER
AI~- AI5 NOT DECODED (X) AI~ - AI5 NOT DECODED (X)
DECODE A3 -
AI5 (B)
CHIP SELECT
FROM A9 - A5
AI,A2=X
A~-I.C.
A~-I.C. A~-1.C. ASSIGNED ADDRESS:
A4, A3, A2,
Al = X ADDRESS RANGE = ~2~ - ~27
~~2~ - ~~2I (B).
ADDRESS RANGE
= ~2~ - ~3F ASSIGNED ADDRESS = ~2~, ~21.
ASSIGNED ADDRESS = ~2~, ~21.
o
o
o

Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200