Gtco Surface-Lit AccuTab - Users Guide Manuel d'utilisateur télécharger pdf (Page 52)

Surface-Lit AccuTab 52

Binary formats use the high order bit in each byte as a synchronization bit. The first byte in

each format has its high order bit set to 1. The remaining bytes have their high order bits

set to 0. The application program must examine the high order bit of each byte to

determine when a format begins.

AccuTab can produce two kinds of binary formats: one is compatible with GTCO AccuTab

and CalComp digitizers, and the other is compatible with Summagraphics digitizers. They

are quite different and are described separately in the following topics.

 GTCO/CalComp Binary Format

 Summagraphics Binary Format

 Low Resolution Binary Format

 Cursor Button Codes in Binary Format

GTCO/CalComp Binary Format

This six-byte format is compatible with the GTCO AccuTab high resolution binary format. It

also emulates the CalComp binary format. Table 4 shows the structure of this format at

the bit level.

Table 4: GTCO/CalComp High Resolution Binary Format

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 69 70

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Gtco Surface-Lit AccuTab - Users Guide Manuel d'utilisateur Page 52