Tandy 1000 Technical Reference Manual

IBM PC
IBM PCjr
TANDY 1000
0
3
7
0
I
2
3
4
5
6
7
8 PRINTER - DATA LATCH
PRINTER - DATA LATCH
PRINTER - DATA LATCH
9
- READ STATUS - READ STATUS
- READ STATUS
A
- CONTROL LATCH
-
CONTROL LATCH
- CONTROL LATCH
B
- NO FUNCTION - NO FUNCTION
- NO FUNCTION
C
- DATA LATCH
- DATA LATCH
D
-
READ STATUS - READ STATUS
E
-
CONTROL LATCH - CONTROL LATCH
0
3
7
F
PRINTER - NO FUNCTION
PRINTER - NO FUNCTION PRINTER - NO FUNCTION
AI0 - AI5 NOT DECODED (Xl AI0 - AI5 NOT DECODED (Xl A0, Al - DECODED BY
A2 = X A0, AI--I.e. A2= X Ml,AI--LC.
PRINTER LOGIC
ADDRESS RANGE:
0370 - 037F ADDRESS RANGE: 0370 - 037F
A2 =X
ASSIGNED ADDRESS: ASSIGNED ADDRESS: ASSIGNED ADDRESS:
DATA LATCH
0378 DATA LATCH 0378
0378 - 037B
STATUS 0379
STATUS 0379
CONTROL LATCH 037A CONTROL LATCH 037 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