Epson 10020 User Manual page 194

Error code
Message
Floppy disk
drives and controller
601
FLOPPY DISK CONTROLLER ERROR
602
SEOUENTIAL SEEK ERROR
603 RANDOM SEEK ERROR
604 WRITE ERROR
605 READ ERROR
Math coprocessor (8087-1)
701
COPROCESSOR NOT INSTALLED
702
COPROCESSOR INITIALIZE ERROR
703
COPROCESSOR INVALID OPERATION MASK ERROR
704
COPROCESSOR ST FIELD ERROR
705 COPROCESSOR COMPARISON ERROR
706
COPROCESSOR ZERO DIVIDE MASK ERROR
707
COPROCESSOR ADDITION ERROR
708
COPROCESSOR SUBTRACTION ERROR
709
COPROCESSOR MULTIPLICATION ERROR
710
COPROCESSOR PRECISION ERROR
Parallel port
901 ERROR PIN p
Parallel port on video adapter
8101
ERROR PIN p
Serial port (RS-232C)
1101
ERROR DTR DSR, DSR ALWAYS HIGH/LOW
1101
ERROR RTS CTS. CTS ALWAYS HIGH/LOW
1102
TIMEOUT ERROR
1103
VERIFY ERROR
Alternate serial port
1201
ERROR DTR DSR, DSR ALWAYS HIGH/LOW
1201
ERROR RTS CTS, CTS ALWAYS HIGH/LOW
1202 TIMEOUT ERROR
1203
VERIFY ERROR
Dot-matrix printer
1401
status: error-type
Performing System Diagnostics D-37