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8.
If you have made the disk compatibility feature
operational (by specifying EMU buffers), select one of
the devices listed under EMULATED DEVICE.
9.
If the disk compatibility feature is operational,
specify the address (three hexadecimal characters) of
the device that is host to the first emulated disk
pack under FIRST HOST ADDRESS.
10.
If the 3310 or 3370 disk devices contain only emulated
CKD data sets, EMULATION-ONLY MODE
=
YES must be
specified to indicate to the compatibility feature
that it has to perform the error logging for the host
device. This is because with nothing but
count/key/data type disks it is safe to assume that an
old operating system is used and this system does not
''know'
1
the new fixed b 1 ock devices.
If FBA and CKD data sets are intermixed on 3310 or
3370 disk devices it is assumed that the operating
system has f i x ed b l oc k de v i c e s up po r
t.
I n th i s case ,
EMULATION-ONLY Mode
=
NO must be specified to indicate
to the compatibility feature that it need not perform
the error logging, that is, that the operating system
takes care of the error logging for the host device.
(Applies to DOS-VSE.)
Note:
After specifiying (or changing) the disk compatibility
feature specifications, a clear reset must be
performed.
If you make an error while entering program load
specifications the following messages are displayed on the
screen:
'Invalid Character' is displayed when an incorrect
selector character has been entered.
1
Invalid Address' is displayed if an invalid 'channel',
'control unit', 'device', or 'host device' address is
specified .
'Incomplete Entry' appears on the screen if no character
was entered or if in case of fast selection, the set of
characters keyed in is incomplete.
I
•
J.
..1..1
d
Invalid Reset, Select
ftcft
appears on the screen an
the cursor is set below the reset specification, if one
of the specifications 'storage size', 'number of
buffers', 'emulated device', 'host device' or
'emulation-only mode' are changed and reset program
(character
1
P
1
)
is specified. This occurs also if P is
Procedures
3 - 5
1
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