Hi George, you rascal :-)

It's not wise to hold values in A, if they
must live longer.
Since most functions use A and destroy
its contents.
Only to give a value from one function
to the next, A can be used.

But real code can be saved on combining
the multiplication with the addition
of the next digit:

;Input: r6,r7 = 16 bit value
; a = new digit (0...9)
;Output: r6,r7 = r6,r7 * 10 + a

Mul10AddDigit:

xch a, r6
mov b, #10
mul ab
xch a, r7
mov b, #10
mul ab
add a, r6 ;add new digit
xch a, r7
addc a, b ;with carry !
mov r6, a



Peter