...of r6-7? ;Prints the BCD number stored in p2 and p0 in seven
printBCD:
mov a,r6
jz m1
jnz m2

m2:
setb p2.4
mov dptr, #table7seg
mov a,R7
anl a,#0fh
movc a,@a+dptr
mov P0, a
mov a, R7
mov dptr, #table7seg1
swap a
anl a,#0fh
movc a,@a+dptr
mov P2, a

m1:
clr p2.4
mov dptr, #table7seg
mov a,R7
anl a,#0fh
movc a,@a+dptr
mov P0, a
mov a, R7
mov dptr, #table7seg1
swap a
anl a,#0fh
movc a,@a+dptr
mov P2, a


ret
;This table is used to convert a number to its 7-segment representation
;The bits are connected as follow: e,g,f,x,a,b,d,c
table7seg:
db 01010000B ; 0
db 11111010B ; 1
db 00110001B ; 2
db 10110000B ; 3
db 10011010B ; 4
db 10010100B ; 5
db 00010100B ; 6
db 11110010B ; 7
db 00010000B ; 8
db 10010000B ; 9

table7seg1:

db 00010010B ; 0
db 01011111B ; 1
db 10010100B ; 2
db 00010101B ; 3
db 01011001B ; 4
db 00110001B ; 5
db 00110000B ; 6
db 01010111B ; 7
db 00010000B ; 8
db 00010001B ; 9

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you arent using R6 for anything. when you go into either routine, you move R7 to the accumulator, which over writes what you previously wrote to it (the value of R6).

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