1) Деление 8 бит / 8 бит ( C = A / B )
1) C = 0
2) if B > A then return C
3) A = A - B
4) ++C
5) GOTO 2)
Ссылки
https://en.wikipedia.org/wiki/Division_algorithm
http://z80-heaven.wikidot.com/advanced-math#toc20
http://www.piclist.com/techref/microchip/math/div/index.htm
converting decimal to hexadecimal using division method
https://www.geeksforgeeks.org/8085-program-to-divide-two-8-bit-numbers/