Or src, Neg -19, Or src -19 – Maxim Integrated MAXQ Family User Manual
Page 196: Maxq family user’s guide
18-19
MAXQ Family User’s Guide
NEG
Negate Accumulator
Description:
Performs a negation (two's complement) of the active accumulator and returns the result back to the active accumulator.
Status Flags:
S, Z
Operation:
Acc
← ~Acc + 1
Encoding:
15
0
MAXQ10
Example(s):
; Acc = FEh, S=1, Z=0
NEG
; Acc = 02h, S=0, Z=0
MAXQ20
Example(s):
; Acc = FEEDh, S=1, Z=0
NEG
; Acc = 0113h, S=0, Z=0
OR src
Logical OR
Description:
Performs a logical-OR between the active accumulator (Acc or A[AP]) and the specified src data. 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:
S, Z
Operation:
Acc
← Acc OR src
Encoding:
15
0
MAXQ10
Example(s):
; Acc = 45h for each example
OR A[3]
; A[3]= 0Fh
→ Acc = 4Fh
OR #33h
;
→ Acc = 77h
MAXQ20
Example(s):
; Acc = 2345h for each example
OR A[3]
; A[3]= 0F0Fh
→ Acc = 2F4Fh
OR #1133h
; MOVE PFX[0], #11h (smart-prefixing)
; OR #33h
→ Acc = 3377h
Special Notes:
The active accumulator (Acc) is not allowed as the src for this operation.
1000
1010
1001
1010
f010
1010
ssss
ssss
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