Showing changes from revision #3 to #4:
Added | Removed | Changed
Entry | |
---|---|
R0 | Reason code |
All other registers dependent on reason code |
Exit | |
---|---|
R0 | Preserved |
All other registers dependent on reason code |
The purpose of this call is to access the serial device driver directly.
The action performed depends on the reason code value in R0.
OS_SerialOp is vectored via SerialV.
# | Hex # | Action |
---|---|---|
0 | &00 | Read/write serial states |
1 | &01 | Read/write data format |
2 | &02 | Send break |
3 | &03 | Send byte |
4 | &04 | Get byte |
5 | &05 | Read/write receive baud rate |
6 | &06 | Read/write transmit baud rate |
7 | &07 | Internal use only |
8 | &08 | Read/write serial input buffer threshold value |
9 | &09 | Enumerate available serial port speeds |
10 | &0A | Get device name |