| 1501 | SDLC ADAPTER Adapter test failed. |
| 1510 | SDLC ADAPTER 8255 port B failure. |
| 1511 | SDLC ADAPTER 8255 port A failure. |
| 1512 | SDLC ADAPTER 8255 port C failure. |
| 1513 | SDLC ADAPTER 8253 timer 1 did not reach terminal count. |
| 1514 | SDLC ADAPTER 8253 timer 1 stuck on. |
| 1515 | SDLC ADAPTER 8253 timer 0 did not reach terminal count. |
| 1516 | SDLC ADAPTER 8253 timer 0 stuck on. |
| 1517 | SDLC ADAPTER 8253 timer 2 did not reach terminal count. |
| 1518 | SDLC ADAPTER 8253 timer 2 stuck on. |
| 1519 | SDLC ADAPTER 8273 port B ERROR |
| 1520 | SDLC ADAPTER 8273 port A ERROR. |
| 1521 | SDLC ADAPTER 8273 command ADAPTER Read timeout. |
| 1522 | SDLC ADAPTER Interrupt level 4 failure. |
| 1523 | SDLC ADAPTER Ring Indicate stuck on. |
| 1524 | SDLC ADAPTER Receive clock stuck on. |
| 1525 | SDLC ADAPTER Transmit clock stuck on. |
| 1526 | SDLC ADAPTER Test indicate stuck on. |
| 1527 | SDLC ADAPTER Ring indicate not on. |
| 1528 | SDLC ADAPTER Receive clock not on. |
| 1529 | SDLC ADAPTER Transmit clock not on. |
| 1530 | SDLC ADAPTER Test indicate not on. |
| 1531 | SDLC ADAPTER data set ready not on. |
| 1532 | SDLC ADAPTER Carrier detect not on. |
| 1533 | SDLC ADAPTER Clear to send not on. |
| 1534 | SDLC ADAPTER Data set ready stuck on. |
| 1536 | SDLC ADAPTER Clear to send stuck on. |
| 1537 | SDLC ADAPTER Level 3 interrupt failure. |
| 1538 | SDLC ADAPTER Receive interrupt results error. |
| 1539 | SDLC ADAPTER Wrap data miscompare. |
| 1540 | SDLC ADAPTER DMA channel 1 error. |
| 1541 | SDLC ADAPTER DMA channel 1 error. |
| 1542 | SDLC ADAPTER Error in 8273 error checking or status reporting. |
| 1547 | SDLC ADAPTER Stray interrupt level 4. |
| 1548 | SDLC ADAPTER Stray interrupt level 3. |
| 1549 | SDLC ADAPTER Interrupt presentation sequence timeout. |