![]() ![]() ![]() (Back in year 1998 or so, I used to have a HP DeskJet 500 printer, which had both serial and parallel ports available. The gender of the printer-side connector is not a reliable indication on whether the port is parallel or serial: historically, some serial-connected printers had non-standard pin-outs and required custom cables, sometimes including non-standard connector gender. In other words, the cable is just the kind of oddball one you might expect to use with a serial-connected printer that supports "DTR flow control". I think I recognize the diagram: it looks like a DTE-DTE serial cable with one-way hardware flow control, between a 9-pin DTE serial port and a 25-pin DTE serial port. You cannot make a serial parallel adapter by just wires, and that diagram is not of a serial parallel adapter. ![]()
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