Hi Stefan,
Thanks for your advice on individual bit select and I think know what you mean about it being too much like HLL now, kind of..

What I have done now, since I’m using assembly, is I’m just going to make it dead simple.

Here is some code

;Inputs: MUX_1, MUX_2, MUX_3, MUX_4, MUX_5, MUX_6, MUX_7, MUX_8
;Outputs: MESS_1, MESS_2

MESS_1 DATA 0x10
MESS_2 DATA 0x11
; MUX_1 through 8 will all each contain a value from RES_1 through RES_4
MUX_1 DATA 0x20
.....
MUX_8 DATA 0x27

RES_1 EQU 0x00
...
RES_4 EQU 0x03

CALL MESS_MAKER

MESS_MAKER:
PUSH ACC
CLR ACC
MOV C, MUX_1.0
RRC A
MOV C, MUX_1.1
RRC A
MOV C, MUX_2.0
RRC A
.....
MOV C, MUX_4.1
RRC A

MOV A MESS_1
CLR A

; I repeat this for MUX_4 through MUX_8 and save to MESS_2

 

Nice, simple and it looks like it works so far