Wang 2200 - Addressing

1.8
ADDRESSING
TEffi
MODEL
2280/2280N
Each
Model
2280/2280N
contains
one
removable
platter and
a
fixed
storage
area
which is
divided into
1,
3
or 5
"logical" platters
or recording
surfaces.
For
consistency
with other
2200 disk
units,
"logical"
platters or
surfaces
are
simply
referred to
as
platters.
In a
program, the
user
refers to
each
platter on the
Model
2280/2280N
"D" is
the device type.
Alternatively,
for
with
a
unique
device
address
of the
form /Dup,
where
"u"
specifies
the
disk
unit and
"p"
specifies the plat
compatibility
with
other
2200
disk units,
device types
3
and
B can
be used
address
the 1st
fixed
platter and
the
removable
platter,
respectively.
to
Each
2280/2280N unit or
pair of
units
is connected to a
DPU
which is, in
turn,
connected
to a
standard
2200 disk
controller.
The
controller can
be
set
to
address
10,
20 or
30.
The tables
below specify
the
device addresses used
for each
controller
setting.
If
disk
controller
is
set to
address
10,
Platter
1st
Disk Unit
2nd Disk
Unit
removable
/DIO
(or
/BIO)
/D50 (or /B50)
1st
fixed
/Dll (or
/310)
/D51
(or
/350)
2nd
"
/D12
/D52
3rd
"
/D13
/D53
4th
"
/D14
/D54
5th
"
/D15
/D55
If
disk
controller
is
set
to
address
20,
Platter
1st
Disk Unit
2nd Disk Unit
removable
/D20 (or
/B20)
/D60 (or /B60)
1st
fixed
/D21
(or
/320)
/D61 (or
/361)
2nd
"
/D22
/D62
3rd
"
/D23
/D63
4th
"
/D24
/D64
5th
"
/D25
/D65
If
disk
controller
is set to
address
30,
Platter
1st
Disk Unit
2nd
Disk Unit
removable
/D30
(or /B30)
/D70 (or /B70)
1st
fixed
/D31
(or
/330)
/D71
(or
/370)
2nd
"
/D32
/D72
3rd
"
/D33
/D73
4th
"
/D34
/D74
5th
"
/D35
/D75
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