Service manual

System Tests 117
A description of the 4-bit error codes are described in the following table:
Error
Code Meaning
0 No error detected for this line
** Error codes testing all lines simultaneously **.
1 No character received.
2 Failed to transmit all characters, or transfer took too long, or lost
receive characters.
3 Too many characters received.
4 Character received not equal expected.
5 Parity, framing, or overrun error detected
** Error code testing baud rates on line 2 **.
6 Baud rate timing error
** Error code testing modem signals through loopback connector **.
7 Modem signals not equal expected
** Error codes testing each line for overrun errors **.
8 Overrun error not equal 0.
9 Character received not equal expected.
A Overrun error failed to set
** Error codes testing each line for framing errors **.
B Framing error failed to set
** Error codes testing transmit flag and interrupt request **
** Register for each line. **.
C TxRdy bit failed to set.
D Transmit line received not equal expected.
E Interrupt request bit ST not set in INT_REQ register.
F Interrupt request bit ST not cleared in INT_REQ register.