![background image](http://html1.mh-extra.com/html/omron/sysmac-cs1d-cpu/sysmac-cs1d-cpu_reference-manual_742268487.webp)
448
Symbol Math Instructions
Section 3-11
Description
–C(412) subtracts the binary values in Su and CY from Mi, and outputs the
result to R. When the result is negative, it is output to R as a 2’s complement.
Flags
Timer Area
T0000 to T4095
Counter Area
C0000 to C4095
DM Area
D00000 to D32767
EM Area without bank
E00000 to E32767
EM Area with bank
En_00000 to En_32767
(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
Area
Mi
Su
R
CY
–
R
CY
Mi
Su
(Signed binary)
(Signed binary)
(Signed binary)
CY will turn
ON when there
is a borrow.
Name
Label
Operation
Error Flag
ER
OFF
Equals Flag
=
ON when the subtraction result is 0.
OFF in all other cases.
Carry Flag
CY
ON when the subtraction results in a borrow.
OFF in all other cases.
Overflow Flag
OF
ON when the result of subtracting a negative number and
CY from a positive number is in the range 8000 to FFFF
hex.
OFF in all other cases.
Underflow Flag
UF
ON when the result of subtracting a positive number and
CY from a negative number is in the range 0000 to 7FFF
hex.
OFF in all other cases.
Negative Flag
N
ON when the leftmost bit of the result is 1.
OFF in all other cases.
Summary of Contents for SYSMAC CS1D-CPU**
Page 3: ...iv...
Page 29: ...xxx...
Page 185: ...146 List of Instructions by Function Code Section 2 4...
Page 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Page 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
Page 1391: ...1352 ASCII Code Table Appendix A...