Tandy 1000 Technical Reference Manual

IBM PC
IBM PCjr
TANDY 1000
~ ~
A
~
NMI MASK REGISTER
PORT A~
NMI MASK REGISTER
1
2
3
4
S
6
7 PORT A~
NMI MASK REGISTER
8
9
A
B
C
D
E
~ ~
A F
NMI MASK
REGISTER
Al~ - AlS NOT DECODED (Xl
Al~ - AlS NOT DECODED AO,Al,A2=X.
CHIP SELECT FROM A9 - AS, l~ CHIP SELECT FROM A9 - A3
A~-A4= X A~- A2= X
ADDRESS
RANGE: M~ - ~BF ADDRESS RANGE: ~A~ - ~A 7
ASSIGNED ADDRESS:
~A~.
ASSIGNED ADDRESS: ~A~.
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