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6287 ULTRA Users ManualPage 16-2
XPAF Support
XPAF (Xerox Printer Access Facility) accepts Advanced Function Printing
Data Stream (AFPDS) data and converts it for use by Xerox printers (4030,
2700, 4045, 3700, etc.). When installed for use with one of these printers,
XPAF expects to see a 3287-like device (such as the ULTRA) at the end of
the coax cable.
These data types are sometimes corrupted by host system forms control.
The ULTRA takes this fact into consideration and strips away any forms
control that might corrupt these data types.
The ULTRA is capable of supporting two important XPAF features. These
are EBCDIC fonts and EBCDIC graphic windows. Originally intended for
EBCDIC printers, these sequences can be sent to an ASCII printer when
attached to the ULTRA.
The ULTRAs support of XPAF allows the protocol converter to be in
ASCII output mode at all times. This is an important feature to ULTRA
users that require the alternate host port(s) for PC-type data.
The ULTRA contains special translate tables to accommodate this feature.
(These are not related to the user-definable translate tables referred to
elsewhere in this manual. They are located in ROM and are unchangeable.)
When either a font or graphic window is detected, these translate tables are
in effect. At the end of the font or graphic window, the translate table is
switched to the one in effect before the graphic window or font was
detected.
Xerox Graphic Window Support
When the ULTRA sees (UDK/Esc)gw, a graphic window is being
processed. The (UDK) is the user-defined key. Please refer to the Xerox
printer programmer reference for further information on this escape
sequence.
If the users application requires this feature, and if the user would like to
use the printer in ASCII mode, this option should be set to Yes. Refer to
Option #60 in Section 5 Configuration Options.
Note: If the ULTRA is in EBCDIC output mode (see Option #10), Option
#60 must be set to No.