Serial port

 

 

 

(RS-232C)

control

signal

ALWAYS LOW

1101

1101

control

signal

ALWAYS HIGH

1102

TIMEOUT ERROR

1103

VERIFY ERROR

 

 

 

 

Alternate

 

 

 

serial port

 

 

 

1201

control

signal

ALWAYS LOW

1201

control

signal

ALWAYS HIGH

1202

TIMEOUT ERROR

1203

VERIFY ERROR

 

 

 

 

Dot-matrix

 

 

 

printer

 

 

 

1401

status

 

 

 

 

 

 

Hard disk drive

 

 

 

and controller

 

 

 

1701

SEEK ERROR

 

1702

WRITE ERROR

1703

READ ERROR

 

1704

HEAD ERROR

1705

ERROR DETECTION ERROR

1706

ERROR CORRECTION ERROR

 

 

 

 

Alternate

 

 

 

gy;llel port

ERROR PIN p

 

 

 

 

 

 

 

Performing System Diagnostics D-31