OS_Byte 203 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Byte 15 – SWI Calls
» OS_Byte 203OS
» OS_Byte
» OS_Byte 203
OS_Byte 203
(SWI &06)
| Entry | |
|---|---|
| R0 | 203 (&CB) |
| R1 | EOR value |
| R2 | AND value |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Value before being overwritten |
| R2 | Serial ignore flag (see OS_Byte 204) |
Use
The purpose of this call is to read or write the serial buffer threshold.
Notes
This call reads or sets the serial buffer threshold. While the free space is below this value the serial hardware will attempt to halt incoming data. OS_SerialOp 0 controls the handshaking method. The default threshold is 9 characters.
See also
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