Service_UKByte (changes)
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Programmer's Reference Manuals
» Part 16 – Service Calls
» Service_UKByte
Service_UKByte
(Service &07)
| Entry | |
|---|---|
| R0 | Pointer to error block |
| R1 | 7 (&07) |
| R2 | OS_Byte number |
| R3 | R1 passed to OS_Byte command |
| R4 | R2 passed to OS_Byte command |
| Exit | |
|---|---|
| All registers preserved to pass on, else | |
| R1 | 0 (claim service) |
| R3 | R1 to return to caller |
| R4 | R2 to return to caller |
Use
This service is issued when an unknown OS_Byte code is given.
Notes
ByteV vector should be used in preference to trapping this service.
See also
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