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COMMUNICATIONS FLOWCHARTS
I~
This appendix contains reference information on terminal
communication functions. This material consists of the
following flowcharts and tables:
•
ASCII code table
o
ASCII to EBCDIC code conversion table
o
Overall point-to-point communications flowchart
•
Keyboard communication switches
MULTIPOINT COMPATIBILITY
Earlier versions of the Multipoint data communications
code provide slightly different feature§ and require a dif-
ferent configuration procedure. The configuration
switches affected are on the Keyboard Interface and Mul-
tipoint Communications Interface PCA's.
The following backdating information is required for func-
tional compatibility if your terminal uses any of the fol-
lowing ROM circuit part numbers:
The following multipoint features are not available in the
earlier code versions:
o
Space Compression
o
Internal Data Set Ready
o
Transparency
Tables C-4 and C-5 contain the switch definitions for the
older code versions. The definitions for switches not shown
are unchanged. Use these definitions instead of those
given in Sections V and VII.
Table C-l is a list of the ASCII characters and their deci-
mal equivalents. Tables C-2 and C-3 contain information for
converting data between the ASCII and EBCDIC character
sets.
The flowchart in figure C-1 illustrates the overall point-
to-point communication function. The various configura-
tion parameters (switches) are included in the diagram.
Detailed descriptions of the switches are given in Sections
V and VII. Figure C-2 illustrates the way the terminal
responds to various keyboard switches.
1818-0214
1818-0261
1818-0288
1818-0433
1818-0434
1818-0435
C-l
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