Print Buffers and Forms Control
Buffer images are supplied for the UCS (Universal Character Set) buffer,
the UCSB (Universal Character Set Buffer). and the FCB (Forms Control
Buffer). The VM/370-supplied buffer images are: • UCS - for the 1403 and 3203 Printers AN
HN
PCAN
PCHN
QN
QNC
RN YN TN
PN SN Normal AN arrangement
Normal HN arrangement
Preferred character set, AN
Preferred character set, HN
PL/I - 60 graphics
PL/I - 60 graphics FORTRAN, COBOL co.mercial
High speed alphanumeric
Text printing 120 graphics
PL/I - 60 graphics
Text printing 84 graphics • UCSB - for the 3203 and 3211 Printers Al1 H11
G 11
P11
T11 tlgg.!l.!ng Standard Commercial Standard Scientific ASCII PLI
Text printing • FCB -for the 3203 and 3211 Printers
There is only one name provided for an FCB image.
Name FCB1 Space 6 lines/inch
Length of page 66 lines
Line 1
3
5
7
9
11
13
15
19
21
23
64
Channel Skip 1
2
3
4
5
6
7
8 10 11
12
9
For the exact contents of the buffer images, see IBM 2821 Control and g,!lg Yn.!l g]g 216 IBM VM/370 System Programmer's Guide

If you find that the supplied buffer images do not meet your needs,
you can alter a buffer image or create a new buffer image. Be careful not to violate the VM/370 coding ccnvGnticns if you add a buff€r image; buffer images must not cross page boundaries.
Adding New Print Buffer Images In order to add a new print buffer image to VM/370, you must: 1. Provide a buffer image name and 12 byte header for the buffer load.
2. Provide the exact image of the print chain.
3. Provide a means to print the buffer image if VER is specified on
the LOADBUF command.
4. Reload the changed CP modules.
Macros are available that make the process of adding buffer images
relatively easy. UCS BUFFER IMAGES The UCS buffer contains up to 240 characters and supports the 1403 printer. To add a new UCS buffer image, first code the UCS macro. This
creates a 12-byte header for the buffer load that is used by the CP module DMKCSO. The format of the UCS macro is:
, I ucs I ucsname I L- ___________________________________________________________________________ ucsname is a 1-to 4-character name that is assigned to the buffer
load.
Next, supply the exact print image. The print image is supplied by
coding DCs in hexadecimal or character format. The print image may
consist of several DCs, the total length of the print image cannot
exceed 240 characters. Part 2. Control Program (CP) 217