Tandy 1000 Technical Reference Manual

PC MEMORY MAP
PCjr MEMORY MAP
TANDY 1 f/Jf/Jf/J MEMORY MAP
3D8 BIT ~
HIGH RESOLUTION CLOCK NOT USED
HIGH RESOLUTION CLOCK
3D8 BIT 1
GRAPHICS SELECT
NOT USED
GRAPHICS SELECT
3D8 BIT 2
BLACK AND WHITE
NOT USED
BLACK AND WHITE
3D8 BIT 3
VIDEO ENABLE
NOT USED
VIDEO ENABLE
3D8 BIT 4
640 DOT GRAPHICS
NOT USED
640 DOT GRAPHICS
3D8 BIT 5
BLINK ENABLE
NOT USED
BLINK ENABLE
3D9 BIT ~
BACKGROUND BLUE
NOT USED
BACKGROUND BLUE
3D9 BIT 1
BACKGROUND GREEN NOT USED
BACKGROUND GREEN
3D9 BIT 2 BACKGROUND RED
NOT USED
BACKGROUND RED
3D9 BIT 3
BACKGROUND INTENSITY
NOT USED
BACKGROUND INTENSITY
3D9 BIT 4
FOREGROUND INTENSITY
NOT USED
FOREGROUND INTENSITY
309 BIT 5
COLOR SELECT
NOT USED
COLOR SELECT
••
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