438
Symbol Math Instructions Section 3-11
Description +BC(406) adds BCD values in Au, Ad, and CY and outputs the result to R.
Flags
Precautions If Au or Ad is not BCD, an error is generated and the Error Flag will turn ON.
If as a result of the addition, the content of R is 0000 hex, the Equals Flag will
turn ON.
If an addition results in a carry, the Carry Flag will turn ON.
Note To clear the Carry Flay (CY), execute the Clear Carry (CLC(041)) instruction.
Examples When CIO 000000 is ON in the following example, D00100, D00110, and CY
will be added as 4-digit BCD values, and the result will be output to D00120.
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 9999
(BCD)
---
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 Au Ad R
CY
+
RCY
(BCD)
(BCD)
(BCD)
Au
Ad
CY will turn
ON when there
is a carry.
Name Label Operation
Error Flag ER ON when Au is not BCD.
ON when Ad is not BCD.
OFF in all other cases.
Equals Flag = ON when the result is 0.
OFF in all other cases.
Carry Flag CY ON when the addition results in a carry.
OFF in all other cases.
To Next Page
Loading...
Need help?
General
