h6. [[ParallelDeviceDriver]] h6(. » [[ParallelDeviceDriver SWI Calls|SWI Calls]] h6((. » [[Parallel_Op]] h6(((. » Parallel_Op 2 h2. Parallel_Op 2 h5. (SWI &42EC1) |_<^{width:4em}. Entry | | |<^. R0 |<^. 2 (Reason code) | |<^. R1 |<^. EOR mask | |<^. R2 |<^. AND mask | |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved | |<^. R1 |<^. Old contents of register | |<^. R2 |<^. New contents of register | h4(#controlregister). Status Register Contents |_<^{width:4em}. Bit|_<^. Meaning |_<^. Port |_<^. Pin | |<^. 0 |<^. Not Strobe |<^. 1 |<^. | |<^. 1 |<^. Not Autofeed |<^. 14 |<^. | |<^. 2 |<^. Init |<^. 16 |<^. | |<^. 3 |<^. Not SelectIn |<^. 17 |<^. | |<^. 4 |<^. IRQ enable |<^. |<^. | |<^. 5 |<^. Direction |<^. |<^. | |<^. 6 |<^. Reserved |<^. |<^. | |<^. 7 |<^. Reserved |<^. |<^. | h4. Use The purpose of this call is to read/write the parallel control register. h4. Notes This SWI writes or reads the the "control register":#controlregister sent to the printer port. h4. See also * [[Parallel_Op]] * [[Parallel_Op 0]] * [[Parallel_Op 1]]