GTCO Cordless Roll-Up - Users Guide - Manual (Page 53)

Cordless Roll-Up 53
hand, binary formats cannot be directly displayed on a terminal or printed-they must be
converted first into displayable characters.
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.
The Cordless Roll-Up can produce two kinds of binary formats: one is compatible with
GTCO Cordless Roll-Up 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 Cordless Roll-Up high resolution binary
format. It also emulates the CalComp binary format. Table 4 shows the structure of this
format at the bit level.