User guide

18-5
MAXQ Family User’s Guide
ADD/ADDC src Add/Add with Carry
Description: The ADD instruction sums the active accumulator (Acc or A[AP]) and the specified src data and stores the result
back to the active accumulator. The ADDC instruction additionally includes the Carry (C) Status Flag in the sum-
mation. For the complete list of src specifiers, reference the MOVE instruction. The MAXQ20 may use the PFX[n]
register to supply the high byte of data for 8-bit sources.
Status Flags: C, S, Z, OV
ADD Operation: Acc ← Acc + src
Encoding: 15 0
MAXQ10
Example(s): ;Acc = 45h for each example
ADD A[3]
; A[3]=0Fh
; → Acc =54h,C=0, Z=0, S=0;
ADD #0C0h ; → Acc =05h,C=1, Z=0, S=0;
ADD A[4]
; A[4]=40h
; → Acc = 85h, C=0, Z=0, S=1, OV=1
MAXQ20
Example(s): ;Acc = 2345h for each example
ADD A[3]
; A[3]=FF0Fh
; → Acc =2254h,C=1, Z=0, S=0, OV=0
ADD #0C0h ; → Acc =2405h,C=0, Z=0, S=0, OV=0
ADD A[4] ; A[4]=C000h
; → Acc = E345h, C=0, Z=0, S=1, OV=0
ADD A[5] ; A[5]=6789h
; → Acc = 8ACEh, C=0, Z=0, S=1, OV=1
ADDC Operation: Acc ← Acc + C + sr
c
Encoding: 15 0
MAXQ10
Example(s): ; Acc = 45h for each example
ADDC A[3] ; A[3] = BAh, C=1
; → Acc = 00h, C=1, Z=1, S=0
ADDC @DP[0]--
; @DP[0] = 0Eh, C=1
; → Acc = 54h, C=0, Z=0, S=0
f100
1010
ssss
ssss
f110
1010
ssss
ssss
Maxim Integrated