Tandy 1000 Technical Reference Manual

Tandy 1000
Technical Reference Manual
First Pixel
P~ 1 I-P-:-2--+-P-:-3-
4
PAO
3
PA3
Medium-Resolution 16-Color Graphics
The medium-resolution 16-color graphics mode works with all types of display
devices. This mode specifies 1 of 16 colors for each pixel.
It requires 32K bytes
of read/write memory, contains 320 rows of 200 pixels, and formats each byte
in the same manner as the low-resolution mode. This mode is available in the
IBM PCjr only.
Second Pixel
Low-Resolution 16-Color Graphics
First Pixel
I P~
1
!-P-:-2--+--P :-3-
The low-resolution mode works with all types of display devices. This mode
contains 200 rows of 160 pixels, requires 16K bytes of read/write memory,
specifies 16 colors for each pixel by the
RGBI bits, and formats 2 pixels per
byte. This mode
is available in the IBM PCjr only.
Second Pixel
I P~O I P:1 I P~2 I P~3 I P~O
Medium-Resolution 4-Color Graphics
The medium-resolution mode works with all types of display devices. This mode
supports 4 of 16 possible colors.
It requires 16K bytes of read/write memory,
contains 320 rows of 200 pixels, selects 1 of 4 colors for each pixel, and for-
mats 4 pixels per byte. This mode
is available in the IBM PC and IBM PCjr.
Fourth Pixel Third Pixel Second Pixel First Pixel
I P~O I P:1 I P~O I P~1 I P~O I P~1 I P~O I P:1
49

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