Compaq P5000 Series Strobe Polarity, Response Polarity, Busy on Strobe, Latch Data On, TOF Action

Chapter 4 HOST INTERFACE

Strobe Polarity

The Strobe Polarity must be set to match the data strobe polarity of your host computer. When the host computer sends a data strobe signal to the printer, this enables the printer to read the data bus.

•Standard. Does not expect the data strobe signal to be inverted.

•Inverted. Expects the host computer to invert the data strobe signal.

Response Polarity

The Response Polarity parameter must be set to match the response polarity of your host computer. This option sets the polarity of the Acknowledge, Online, Fault, Paper Empty, and Busy signals.

•Standard. Does not invert the response signals.

•Inverted. Inverts the response signals sent to the host computer.

Busy on Strobe

•Enable. Asserts a busy signal after each character is received.

•Disable. Asserts a busy signal only when the print buffers are full.

Latch Data On

The Latch Data On parameter specifies whether the data is read on the leading or trailing edge of the data strobe signal.

Prime Signal

•Enable. The parallel port performs a warm start (reboot) if the host asserts the prime signal.

•Disable. The parallel port does not perform a warm start (reboot) if the host asserts the prime signal.

TOF Action

TOF (Top-Of-Form) Action determines whether or not a form feed is performed before a warm start when the prime signal is asserted from the host. This setting is used only if the Prime Signal parameter is enabled.

•Reset. Form feed on reset.

•Do Nothing. No form feed on reset.

Buffer Size in K

Configures the amount of memory allocated for the Centronics parallel port buffer. The default is 8 Kbytes, but you can specify between 1 and 16 Kbytes, in 1-Kbyte increments.

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