GTCO Surface-Lit AccuTab - Users Guide - Manual (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