Tandy 1000 Technical Reference Manual

Tandy 1000
General Memory Information
Mode Selection Summary
Technical Reference Manual
40x25 40x25
80x25
160x200
320x200 320x200
320x200 640x200
640x200
Alpha
Alpha Alpha 16 Color 4 Color 4 Shades 16 Color 2 Color 4 Color
B/W Color
Color Graphics
Graphics Of B/W
Graphics Graphics Graphics
308
Bit 0
a a
1 a
a a
1
a 1
HRESCK
308
Bit 1
a a a
1
1
1 1 1
1
GRPH
3K8
Bit 2
1
a
a a
a
1
a
a
a
BW
308
Bit 4 a a
1 a
a a
a 1
1
HRESAO
30A
REG 03
a a a
a
a a
a
a
1
Bit 3
4
Color
30A
Reg 03
a a a
1
a
a
1
a
a
Bit 4
16 Color
I/O Map
Address
Block Usage
Function
0000 - 001 F 0000 - OOOF
OMA Function
0020 - 003F
0020 -
0021
Interrl,Jpt Controller
0040 - 005F 0040 - 0043 Timer
0060 - 007F
0060 - 0063
PIO
0080 - 009F
0080 - 0083 OMA Page Register
OOAO - OOBF
OOAO NMI Mask Register
OOCO- OOOF OOCO- 00C1 Sound Generator
OOEO - 01 FF
Reserved
0200 - 020F 0200 - 0201
Joystick I/F
0210 - 031 F
Reserved
0320 - 032F
Reserved Hard
Disk
0330 - 036F Not Assigned
0370 - 037F 0378 - 037B Printer
0380 -
03CE Not used
0300- 03DF All System Video
03EO - 03EF Reserved
03FO - 03FF
03F2,
F4, F5 Floppy Disk Controller
0400 - FFFF
Not Usable
58

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