Figure 29 Shows An Overlay Nesting; Overlay Function Set Commands - Printronix S828 Programmer's Manual

Programmer Manual
Table 7. Code 128 Character Set (EBCDIC) (continued)
Character Hex
ENQ 2D
ACK 2E
BEL 2F
SYN 32
EOT 37
DC4 3C
NAK 3D
SUB 3F
SP 40
Note: All START, STOP, SHIFT, and CODE characters are generated by the printer in order to produce
the shortest bar code possible from the given data.

Overlay Function Set Commands

The overlay function set contains the commands the printer uses to store, delete, and present information
in the overlay memory of the printer. These commands are independent of any specific data types used in
defining the overlay.
The overlay is contained between the Begin Overlay (BO) command and the End Page (EP) command
and cannot contain itself. Overlays can be nested; that is, overlays can contain other overlays. The depth
of the overlay nesting cannot exceed five levels.

Figure 29 shows an overlay nesting.

Figure 29. An Example of Overlay Nesting
The following commands are the overlay function set:
Command Code Description
BO D6DF Begin Overlay
DO D6EF
IO D67D Include Overlay
The following pages describe the overlay function set commands.
Chapter 5 IPDS Programming Information
Character Hex
" 7F
a 81
b 82
c 83
d 84
e 85
f 86
g 87
h 88
Delete Overlay
Character Hex
{ C0
A C1
B C2
C C3
D C4
E C5
F C6
G C7
H C8
209
Character Hex
3 F3
4 F4
5 F5
6 F6
7 F7
8 F8
9 F9
FNC3 FA
DEL FF
PTX‐S828
260071‐001A