OS_Byte 192 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Byte 15 – SWI Calls
» OS_Byte 192OS
» OS_Byte
» OS_Byte 192
OS_Byte 192
(SWI &06)
| Entry | |
|---|---|
| R0 | 192 (&C0) |
| R1 | 0 |
| R2 | 255 |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Communication state |
| R2 | Flash counter (see OS_Byte 193) |
Use
The purpose of this call is to read the serial port state.
Notes
This call is deprecated. Please use OS_SerialOp 0 or OS_SerialOp 1 instead.
It is equivalent to a read operation with OS_Byte 156. It is provided for backwards compatibility only.
This call should not be used to write the value – doing so would make the value in memory inconsistent with the hardware.
See also
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