Parallel_Op (changes)
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ParallelDeviceDriver
» SWI Calls
» Parallel_Op
Parallel_Op
(SWI &42EC1)
| Entry | |
|---|---|
| R0 | Reason code |
Reason Codes
| # Value | Meaning |
|---|---|
| 0 | Read data and status registers |
| 1 | Write data registers |
| 2 | Read/write control register |
Use
The purpose of this call is to perform direct operations to the parallel hardware.
Notes
Reason Codes shown are in decimal.
See also
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