HP 3000 III Series Manual page 250

MCU/Main Memory Overview
6-46. WIO Command. WIO instructions may be executed only if TIO
bit 1
=
1 (R/W OK). Figure 6-12 is the word format for a WIO
instr uction.
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
l )
WRITE COpy
Y
LOAD BLOCK
10 BIT ADDRESS
LOAD SINGLE
LiU512K
Figure 6-12. WIO Word Format
Bit 0
Bit 2
Bit 3
Bit 4
Bit 5
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 are
transferred into the upper l28K Error Logging Array or
the lower 5l2K Error Logging Array 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 50 usec
after a transfer. A CIO Master Clear will abort a
Wr i te 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 5l2K. If bit 5
=
1, then the upper 5l2K Error
Logging Array is selected and, if bit 5 = 0, then the
lower 5l2K Error Logging Array is selected during a
Write Copy execution. The upper or lower 5l2K Error
Logging Array is selected after one CPU clock cycle.
6-26