IBM Personal System/2 65 SX - Adapter Setup

Adapter Setup
The
Adapter
Enable/Setup
register
(hex
0096)
selects
the
channel
connector
to
be
configured.
Bit Function
7 Channel Reset
6-4 Reserved
3 Card-Setup Enable
2-0 Channel Select 2 - 0
Figure
2-11.
Adapter
Enable/Setup
Register
(Hex
0096)
Bit
7
When
set
to
1,
this
bit
activates
the
‘channel
reset’
signal
to
all
connectors.
Bits6-4
These
bits
are
reserved.
Bit3
When
set
to
1,
this
bit
enables
the
‘-card
setup’
signal
(-CD
SETUP)
selected
by
bits
2
through
0.
Bits2-0
These
bits
are
the
address
bits
for
-CD
SETUP.
Connectors
1
through
8
are
addressed
as
0
through
8,
respectively.
When
bit
3
is
set
to
1,
these
bits
select
the
connector
that
is
put
into
setup
mode.
Associated
with
each
channel
connector
is
a
unique
‘-card
setup’
signal
used
to
put
the
adapters
in
the
setup
mode,
which
allows
access
to
the
POS
registers.
The
individual
connectors
are
selected
through
the
Adapter
Enable/Setup
register.
Setup
information
is
then
read
from
or
written
to
the
selected
adapter
through
I/O
addresses
hex
0100
through
0107.
Notes:
1.
-CD
SETUP
goes
active
only
when
an
operation
is
performed
in
the
I/O
address
range
of
hex
0100
through
0107.
2.
The
status
of
the
Adapter
Enable/Setup
register
(hex
0096)
can
be
read
by
a
program.
however,
when
the
register
is
read,
bits
6
through
4
are
set
to
1.
2-12
Model
65
POS
—
October
1990