Figure 1 shows the listing of a character arrangement
table module. The numbered notes that follow the figure describe the
items marked with the encircled numbers.
Figure 1. IEBIMAGE Listing of a Character Arrangement Table Module
Notes to Figure 1:
- The name of the character arrangement table module, as it exists
in the directory of the image library (including the 4-byte system-assigned
prefix).
- The 1-byte identifier of an IBM-supplied character set (in this
example, the Text 1 and Text 2 character sets, whose identifiers are X'8F' and X'11').
All character sets in SYS1.IMAGELIB
or a user-specified image library are represented by odd-numbered
identifiers. For a 3800 Model 3, if the character set identifier specified
is even-numbered, it is increased by one at print time and the character
set with that identifier is loaded.
- The sequence number of the WCGM that is to contain the character
set indicated below it (in this example, the second WCGM, whose identifier
is 1).
- The sequence number of the WCGM that contains the scan pattern
for the 8-bit data code that locates this translation table entry.
- Your 8-bit data code X'B9' transmitted to the 3800 Model
3 addresses this, the B9 location in the translation table, where
the value X'39' in turn is the index into the WCGM that contains
the scan pattern to be used (in this example, the Text 2 superscript
9).
- An asterisk is shown in the listing for each translation table
entry that contains X'FF'. This indicates that the 8-bit data
code that addresses this location does not have a graphic defined
for it and is therefore unprintable.
- An asterisk in the list of character set identifiers indicates
that no character set is specified to use the corresponding WCGM.
If you specify 7F or FF as a character set identifier (to allow accessing
a WCGM without loading it), a 7F or FF prints here.
- The name of a graphic character modification module, as the name
exists in the library's directory (including the system-assigned prefix).
When you specify a graphic character modification module to be associated
with a character arrangement table, you must specify the OPTION statement
with the DEVICE parameter (for the 3800 Model 3) to ensure that the
system assigns the correct prefix (GRF2) to the graphic character
modification module name.