Digital Equipment VAXstation I Service Manual page 37

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CHAPTER 2
PROGRAMMING INFORMATION
This chapter briefly describes the programmable functions of
the
VCBOl;
that
is,
the
functions
that
can
be specified and/or
examined by software.
For more information see Chapter 4 in
the
VAXstation
I
Technical Manual, EK-VS200-TM.
2.1
VCBOl
REGISTERS
Control and Status information is exchanged between the VCBOl and
the
CPU
through
32
16-bit
locations
in the
I/O
Page.
These
locations are listed in Table 2-1 and described below.
NOTE - Bit Descriptions
Many of the bit
descriptions
tables
include
a
value
in
example:
(1 =chip
armed).
indicates the initialized value
2-1
in
the
following
parenthesis;
for
This
usually
of the bit.

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