IBM Personal System/2 65 SX User Manual

Bit 4
Bits 3-0
Reading
this
bit
as
a
1
indicates
that
a
bus
time-out
has
occurred.
The
bus
time-out
indication
is
not
reset
until
bit
6
of
this
register
is
set
to
0.
This
bit
is
reserved
and
should
be
set
to
0.
These
bits
are
undefined
for
a
write
operation
and
should
be
set
to
0.
Reading
these
bits
returns
the
arbitration
level
of
the
arbiter
controlling
the
channel
during
the
most
recent
grant
state.
This
information
allows
the
system
microprocessor
to
determine
the
arbitration
level
of
the
device
that
caused
a
bus
time-out.
Micro
Channel
Connectors
The
Model
65
SX
system
board
provides
eight
micro
channel
connectors:
Seven 16-bit connectors
*
One
16-bit
connector
with
an
auxiliary-video
extension.
Diskette-Drive
Controller
The
system
board
uses
the
Type
1
diskette-drive
controller.
The
following
table
shows
the
signal
assignments
and
pin
numbering
for
the
2-
by
20-pin
connector
used
in
the
Model
65
SX.
3-6
Model
65
System
Board
—
October
1990

IBM Personal System/2 65 SX Specifications

General

Brand	IBM
Model	Personal System/2 65 SX
Category	Desktop
Language	English