With the exception of the Get Version Number function call, when the device driver returns control to the calling program after a function call, a function call return code is returned in the AX register. These status codes are shown in Table 1.
AX Register Contents | Description |
---|---|
00 | Function call complete. |
01 | Function call unknown. |
02 | Asynchronous adapter not responding. |
03 | Library returns NACK to message. |
04 | Library not responding. |
05 | Communications not enabled. |
06 | Not used at this time. |
07 | Not used at this time. |
08 | No pending messages in receive message buffer. |
09 | Receive message buffer overrun attempted. |
0A | Library failed to complete message it was sending. |
0B | Library responded to command message with other than ACK or NACK. |
0C | Asynchronous adapter failed to complete sending message to library. |