OS_SerialOp 0 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_SerialOp 15 – SWI Calls
» OS_SerialOp 0OS
» OS_SerialOp
» OS_SerialOp 0
OS_SerialOp 0
(SWI &57)
| Entry | |
|---|---|
| R0 | 0 |
| R1 | EOR mask |
| R2 | AND mask |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Old value of state |
| R2 | New value of state |
Use
The purpose of this call is to read/write the serial state.
Notes
The structure of this call is very similar to that of OS_Byte’s between &A6 and &FF the new state is determined by:
New State (see Serial Status Word) = (Old state AND R2) EOR R1
See also
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