1031
Text String Processing Instructions Section 3-31
Variations
Applicable Program Areas
Operands S: Text String First Word
Note The data from S to S + the maximum 2,047 words must be in the same area.
Operand Specifications
Description CLR$(666) clears with NUL (00 hex) the entire text string from the first word
designated by S until the NUL code (00 hex). The maximum number of char-
acters that can be cleared is 4,096. If there is no NUL before the 4,096 char-
acter, only 4,096 characters will be cleared.
Variations Executed Each Cycle for ON Condition CLR$(666)
Executed Once for Upward Differentiation @CLR$(666)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification Not supported
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
15 0
S
to
Text string data: 4,095 characters max. + NUL
S + maximum 2,047 words
Area S
CIO Area CIO 0 to CIO 6143
Work Area W0 to W511
Holding Bit Area H0 to H511
Auxiliary Bit Area A448 to A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
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
NUL
S
S
AB
DC
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