770
Basic I/O Unit Instructions Section 3-22
Description IORF(097) refreshes the I/O words between St and E, inclusively. IORF(097)
is used to refresh words allocated to CPM1A Expansion Units, CPM1A
Expansion I/O, or Special I/O Units.
When refreshing is specified for words in the Special I/O Unit bit area, all 10
words allocated to the Unit will be refreshed as long as the first word of the 10
words allocated to the Unit is included in the specified range of words.
IORF(097) cannot be used for built-in I/O on the CPU Unit or for CPU Bus
Units. Use instructions with the immediate refresh option. IORF(097) and
immediate refresh options cannot be used for built-in analog I/O on XA CPU
Units.
If words for which there is no Unit mounted exist between St and E, nothing
will be done for those words and only the words allocated to Units will be
refreshed.
Applicable Units The following Units can be refreshed with IORF(097).
Note The Units that can be refreshed with IORF(097) are not necessarily the same
as the Units that can be refreshed with immediate refreshing specifications (!).
Indirect DM addresses in
binary
---
Indirect DM addresses in
BCD
---
Constants ---
Data Registers ---
Index Registers ---
Indirect addressing using
Index Registers
,IR0 to ,IR15
–2048 to +2047,IR0 to –2048 to +2047,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to ,–(– –)IR15
Area St E
St
E
I/O refreshing
I/O bit area or
Special I/O Unit bit area
CPM1A Expansion Units,
CPM1A Expansion I/O
Units, or Special I/O Units
I/O Words Applicability
of IORF(097)
Built-in I/O Inputs: CIO 0 and CIO 1
Outputs: CIO 100 and CIO 101
No
Built-in analog inputs CIO 200 to CIO 203 No
Built-in analog outputs CIO 210 and CIO 211 No
CPM1A Expansion I/O Units Inputs: CIO 2 to CIO 99
Output: CIO 102 to CIO 199
Ye s
CPM1A Expansion Units
Special I/O Units CIO 2000 to CIO 2959 Yes
CPU Bus Units CIO 1500 to CIO 1899 No
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