Xerox 4213 MICR MRP ユーザーガイド
E.
Coax communications buffer
This appendix describes a memory area known as the
communications buffer which is used by all coax emulations.
communications buffer which is used by all coax emulations.
The communications buffer contains a character buffer and an
attribute buffer. Each of these buffers contains 4KB of storage.
attribute buffer. Each of these buffers contains 4KB of storage.
The first 80 bytes of the character buffer contains the printer
control information area (PCIA). The first 80 bytes of the attribute
buffer contains the extended PCIA.
control information area (PCIA). The first 80 bytes of the attribute
buffer contains the extended PCIA.
The remainder of the character buffer is a message area, which
contains data and commands necessary for printing. The attribute
buffer can contain additional information about how each
character prints. Figure E-1 shows the communications buffer.
contains data and commands necessary for printing. The attribute
buffer can contain additional information about how each
character prints. Figure E-1 shows the communications buffer.
Figure E-1.
Communications buffer
Ext. PCIA
Character Buffer
Extension Attribute Buffer
X‘0000 - 004F‘ described
on the following pages
on the following pages
X‘1000 to 104F‘
not used
X‘1FFF‘
PCIA
X‘0FFF‘
XEROX COAX/TWINAX OPTION (XCTO) PROGRAMMER REFERENCE
E–1