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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure SGIOP Synchronous General I/O Parameters
0000 0 Signed 2 SGIDEVNO The virtual device number of the
device to be used.
0002 2 Bitstring 2 SGIOKF (0) Key and Flag bytes.
0002 2 Bitstring 1 SGIKEY The Storage Protection Key to use
for I/O operations with this
request.
0003 3 Bitstring 1 SGIFLG ORB Word 1, Bits 8-15
00000080 SGIFMT X'80' SGIFMT F-CCW format. 0=F0,
1=F1
00000002 SGIDAWF2 X'02' SGIDAWF2 H-IDAW format
0=F1, 1=F2
00000001 SGIDAW2K X'01' SGIDAW2K T-IDAW size 0=4K,
1=2K
0004 4 Signed 4 SGIRESV1 Reserved for future IBM use.
0008 8 Address 4 SGICPA Channel Program Address for this
request.
000C 12 Signed 4 SGIRESV2 Reserved for future IBM use.
0010 16 Bitstring 8 SGICASC (0) Combined CCW Address, Device &
Subchannel status and Residual
count fields.
0010 16 Address 4 SGICCWA Address of CCW at Interrupt (+8).
0014 20 Bitstring 1 SGIDEVST The Device Status byte, returned
by CP.
0015 21 Bitstring 1 SGISCHST The Subchannel Status byte,
returned by CP
0016 22 Signed 2 SGIRESCT The Residual Count, returned by
CP.
0018 24 Bitstring 1 SGILPM Path down which i/o is to be done
0019 25 Bitstring 1 SGIOPTS SGI options
1... .... SGIEAV X'80' SGIEAV ccccCCCh Cylinder
Addressing SGIEAV must be set to
enable access to cylinders at or
above 65520. This applies to 3390
Extended Address Volumes.
001A 26 Bitstring 2 SGIRESV3 Reserved for future IBM use.
001C 28 Signed 2 SGIRESV4 Reserved for future IBM use.
001E 30 Signed 2 SGISNSCT The amount of sense data present.
0020 32 Signed 4 SGIRESV5 Reserved for future IBM use.
0024 36 Signed 4 SGIRESV6 Reserved for future IBM use.
0028 40 Signed 4 SGIRESV7 Reserved for future IBM use.
002C 44 Signed 4 SGIRESV8 Reserved for future IBM use.
0030 48 Signed 4 SGIRESV9 Reserved for future IBM use.
0034 52 Signed 4 SGIRESVA Reserved for future IBM use.
0038 56 Bitstring 32 SGISDATA The sense data (only if unit
check is on in SGIDEVST).
00000058 SGIBYLEN *-SGIOP Length (in bytes) of
SGIOP.
0000000B SGIDWSIZ ((SGIBYLEN+7)/8) Size of SGIOP in
Doublewords.
0008 8 Bitstring 3 *
000B 11 Bitstring 1 SGICPA3 Right-most byte for alignment
test
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