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Bits 6-15
Maintenance Procedures
Address-The 10 bit address (1024 locations) is the starting address for a Read Copy of
the ELA to the I/O logging array or a Read Scan of the I/O logging array. The address is
loaded on all CIa instructions and is not affected by master clear.
4-106.
WIO COMMAND. WIO instructions may be executed only if TIO bit 1
=
1 (R/W OK).
Figure 4-30 is the word format for a WIO instruction.
Bit 0
Bit 2
Bit
Bit 4
Bit 5
Bits 6-15
Data-This bit is used as the data in a WIO Load Block and Load Single instruction.
Write Copy-The contents of the I/O logging array is transferred into the upper 128K
ELA or the lower 128K ELA starting at the address specified by bits 6 through 15, and
ending at address %1777. At the completion of the transfer, the Address Counter is set
to %0000. During a transfer, TIO bit 1
=
0 (R/W not OK) and goes to a 1 at 100 usec after
a transfer. A CIa Master Clear will abort a Write Copy.
Load Block-The data in bit 0 (Data) is transferred to the I/O logging array in all
locations starting at the location specified by bits 6 through 15 and ending at %1777.
Upon completion of the transfer the Address Counter is set to %0000. During the
transfer, TIO bit 1 = 0 and goes to a 1 two usec after a transfer. A Load Block will
override simultaneous Write Copy and/or Load Single.
Load Single-The data in bit 0 (Data) is transferred to the I/O logging array at the
address location specified by bits 6 through 15. The Address Counter is not changed
after the completion of the transfer.
L/NU 128K-If bit 5
=
1, then the upper 128K ELA is selected and if bit 5
=
0, then the
lower 128K ELA is selected during a Write Copy execution. The upper or lower 128K
ELA is selected after one CPU clock cycle.
Address-The 10 bit address (1024) locations is the starting address for a Write Copy of
the I/O logging array to the ELA, a Load Block of the I/O logging array, or the address
for a Load Single of the I/O logging array.
WIO
I
I
I
I
I
I
0
1 2 3 4 5 6
'Is
9
10 11
12
13
14
15
I
DATA~
MSB
LSB
NOT USED
\.
)
WRITE COpy
Y
10
BIT ADDRESS
LOAD BLOCK
LOAD SINGLE
UU128K
7522-49
Figure 4-30. WIO Word Format
4-47
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