The extension contains the following fields:
The CA Spool FCB extension must begin with the text ESFEXT. This is a very useful eye-catcher in unformatted listings.
Maximum print position. The length of this field is 2 bytes. The value must be in the range of 0 - 255. It is sent to the printer in an SHF command.
Print quality. The length of this field is 1 byte. The value must be in the range 0 - 3. It is sent to the printer in the quality field in a PPM command.
Characters per inch. The length of this field is 1 byte. The value must be in the range 0 to 19. It is sent to the printer in the SPD command.
Drawer selection. This field is for variables in the PPM SCS command for the 5210. The first half byte contains the FC specification and the second half contains the SD specification. For more information, see the relevant printer programming guide.
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