495
Conversion Instructions Section 3-12
Applicable Program Areas
Operand Specifications
Note R and R+1 must be in the same data area.
Description SIGN(600) converts the 16-bit signed binary number in S to its 32-bit signed
binary equivalent and writes the result in R+1 and R.
The conversion is accomplished by copying the content of S to R and writing
FFFF to R+1 if bit 15 of S is 1 or writing 0000 to R+1 if bit 15 of S is 0.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area S R
CIO Area CIO 0000 to CIO 6143 CIO 0000 to CIO 6142
Work Area W000 to W511 W000 to W510
Holding Bit Area H000 to H511 H000 to H510
Auxiliary Bit Area A000 to A959 A448 to A958
Timer Area T0000 to T4095 T0000 to T4094
Counter Area C0000 to C4095 C0000 to C4094
DM Area D00000 to D32767 D00000 to D32766
EM Area without bank E00000 to E32767 E00000 to E32766
EM Area with bank En_00000 to En_32767
(n = 0 to C)
En_00000 to En_32766
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants #0000 to #FFFF
(binary)
---
Data Registers DR0 to DR15 ---
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
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
The content of S is
transferred "as is" to R.
Source word (S)
1
st
result word (R)
2
nd
result word (R+1)
If bit 15 of S is 1, FFFF is transferred to R+1.
If bit 15 of S is 0, 0000 is transferred to R+1.
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