GTCO Roll-Up II - Users Guide - Manual (Page 50)

Roll-Up II 50
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.
Roll-Up II can produce two kinds of binary formats: one is compatible with GTCO Roll-Up II
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
This six-byte format is compatible with the GTCO Roll-Up II 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