Possible assembler realisation of ANSI C conform logical functions:

logical comparison:

r7 = r7 > r6:

mov a, r6
clr c
subb a, r7
subb a, acc
mov r7, a ;00 / FF


logical inversion:

r7 = !r7:

mov a, r7
mov r7, #0
jnz _m1
mov r7, #2
_m1: ;00 / 02


Peter