Epson 486SX User Manual page 197

System diagnostics error messages (continued)
Error code
Color graphics adapter and CRT
501
503
504
506
508
509
510
511
Diskette drive(s) and controller
601
602
603
604
605
606
607
Math coprocessor
701
702
703
704
705
706
707
708
709
C-12 Performing System Diagnostics
Message
Error in adapter check
Error in attribute
Error in character set check
Error in color graphics check
Error in screen paging check
Error in light pen check
Error in color video check
Error in sync check
Diskette drive controller error
Sequential seek error
Random seek error
Write error
Read error
Disk change check remove error
Disk change check insert error
Coprocessor not installed
Coprocessor initialize error
Coprocessor invalid operation mask error
Coprocessor st field error
Coprocessor comparison error
Coprocessor zero divide mask error
Coprocessor addition error
Coprocessor subtraction error
Coprocessor multiplication error