Parallel

Interface Modes

initialization sequences, custom banner pages, print job headers, or print job trailers. The print server does not necessarily send multiple print jobs to the printer in the order that you queued them to the printer. The network job separator is accessed with each print job, so this ensures that network job separation is enforced. See QMS Crown Network Notes for more information on how to create a network job separator for several commonly used networks.

Parallel Interface Modes

In addition to Centronics parallel communication, your printer’s parallel interface provides IEEE 1284 bidirectional parallel communication, which supports five modes of operation. The printer automatically recognizes and uses the mode dictated by the host.

Byte Mode

Printer-host communication is done in bytes.The byte mode may be used by the host device in a DMA (Direct Memory Access) mode for more efficient operation.

When byte transfer is complete and there is no more data to transmit, the host may do one of the following:

nTerminate and return to the compatibility mode.

nStay in the Host Busy, Data Not Available phase.

nSet Host Busy Low, putting the interface into the idle phase. If there is additional data, the host may do one of the following:

nSet Host Busy Low, indicating that the host can accept additional data.

nStay in the Host Busy, Data Not Available phase.

nTerminate and return to the compatibility mode.

Check your host documentation to see if the host is 1284 compatible.

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QMS 1660E Print System Reference