Tandy 1000 HX Technical Reference Manual page 65

TANDY COMPUTER PRODUC
60
DATA
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
IBM PC
0062 — PORT C —
READ ONLY
CONFIG SW16 OR (R/W)
CONFIG SW12 (R/W)
SEE PORT 0061, BIT 2
(R/W)
CONFIG SW15 (R/W)
CONFIG SW14 (R/W)
CONFIG SW13 (R/W)
CASSETTE DATA IN (R)
8253 OUT #2 (R)
1=1/0 CHECK (PARITY
ERROR) (R)
1=RAM PARITY ERROR
(R)
HARDWARE LOGIC
ATTACHED
IS FOR INPUT ONLY.
IBM PCjr
0062 — PORT C —
READ ONLY
1 = KEYBOARD LATCHED
0 = INTERNAL MODEM
INSTALLED
0 = DISKETTE DRIVE
INSTALLED
0 = 64K RAM
EXPANSION
INSTALLED
SAME VIDEO
SAME
KEYBOARD
DATA
KEYBOARD CABLE
INSTALLED
TANDY 1000 HX
0062 — PORT C —
(OUT) NOT USED
(OUT) NOT USED
(OUT) NOT USED
FAST (0=STD OPERATION)
read/write
ll
0"=4 .77MHz
"1"=7.16MHz
read/write "0"=4.77MHz
"1"=7.16MHz
EEPROM SERIAL DATA-
READ ONLY
(IN) SAME
MONOCHROME MODE
0=COLOR MONITOR
1=350 LINE MONITOR
MONO
RESERVED = 0
IN TANDY 1000 THE
HARDWARE LOGIC IS
CONFIGURED SO THAT
PORT C IS SPLIT WITH
INPUT: PC4 — PC7
OUTPUT: PC0 — PC3