Maxim Integrated MAXQ Family - Manual (Page 186)

18-9
MAXQ Family User’s Guide
CMP src Compare Accumulator
Description: Compare for equality between the active accumulator and the least significant byte of the specified src. The
MAXQ20 may use the PFX[n] register to supply the high byte of data for 8-bit sources.
Status Flags: E
Operation: Acc = src: E ← 1
Acc <> src: E ← 0
Encoding: 15 0
MAXQ10
Example(s):
CMP A[1] ; Acc = 45h, A[1] = 10h, E=0
CMP #45h ; Acc = 45h, E=1
CMP DP[0] ; Acc = 45h, DP[0]=0345h, E=1
MAXQ20
Example(s):
CMP #45h ; Acc = 0145h, E=0
CMP #145h ; PFX[0] register used
; MOVE PFX[0], #01h (smart-prefixing)
; CMP #45h E=1
CPL Complement Acc
Description: Performs a logical bitwise complement (1's complement) on the active accumulator (Acc or A[AP]) and returns the
result to the active accumulator.
Status Flags: S, Z
Operation: Acc ← ~Acc
Encoding: 15 0
MAXQ10
Example(s):
; Acc = FFh, S=1, Z=0
CPL ; Acc ← 00h, S=0, Z=1
; Acc = 09h, S=0, Z=0
CPL ; Acc ← F6h, S=1, Z=0
MAXQ20
Example(s):
; Acc = FFFFh, S=1, Z=0
CPL ; Acc ← 0000h, S=0, Z=1
; Acc = 0990h, S=0, Z=0
CPL ; Acc ← F66Fh, S=1, Z=0
f111 1000 ssss ssss
1000 1010 0001 1010
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