Tandy 1000 Technical Reference Manual

IBM PC IBM PCjr
TANDY l~~~
DATA
~~62 - PORT C - READ ONLY ~~62 - PORT C - READ ONLY ~~62 - PORT C - READ/WRITE
BIT
~
CONFIG SWI6 OR I =KEYBOARD LATCHED
(OUT) NOT USED
CONFIG SW12
SEE PORT ~~61, BIT 2
BIT 1
CONFIG SW15
~ = INTERNAL MODEM INSTALLED
(OUT) MULTI-DATA
BIT 2
CONFIGSW14
~ =DISKETTE DRIVE INSTALLED (OUT) MULTI~LOCK
BIT 3 CONFIGSW13 ~ = 64K RAM EXPANSION (OUT) NOT USED
INSTALLED
BIT 4 CASSETTE DATA IN SAME
(IN)
NOT USED
BIT 5
8253 CUT #2 SAME
(IN) SAME
BIT 6
1
= I/O CH CK (PARITY ERROR)
KEYBOARD DATA (IN) NOT USED
BIT 7
1
=RAM PARITY ERROR
KEYBOARD CABLE INSTALLED
(IN) NOT USED
HARDWARE LOGIC ATTACHED
IN TANDY 1
~~~ THE HARDWARE
IS
FOR INPUT ONLY.
LOGIC IS
CONFIGURED SO THAT
PORT C IS SPLIT WITH
INPUT: PC4 - PC7
OUTPUT:
PC~ - PC3
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