HP V8.5 manual Centronics Interface Board

A P P E N D I X

CENTRONICS INTERFACE BOARD

The new Centronics adapter (rev1-2) implements some improve- ments over the previous (rev1-1) adapter card. These include:

a)Rev 1-2 cards will accept either of the two data transfer methods described below automatically; no switches or jumpers required.

b)Reliable data transfers using up to 40 ft length of shielded cable.

c)Rev 1-1 adapter cards exhibit inconsistent data transfer with newer generation PC.’s equipped with high speed integrated Centronics parallel ports.

The following are two transfer formats that can be used with the optional V8.5E Centronics parallel adapter:

C

1.) Standard transfer format

To place the V8.5E Centronics adapter in raster mode, the following 3 bytes (hex) must be sent to the Centronics adapter card:

1B, 2A, 00

Once these 3 bytes are sent, rastered plot data can be sent to the plotter as follows:

V8.5E bytes/scan menu setting	bytes/scan raster data
b1	216
b2	264
g1-g4	1728

V8.5eRev2.2.2002 C-1