Oh, I probably should explain the "no divides required" when there are two "/2"'s in the equations. In binary, a divide by two is the same as shifting right one bit, an easy operation in Z80. Similarly multiply by two is the same as shifting left one bit....
For anyone who'd like to try that... www.advanced-ict.info/interactive/...
Cool! I like that.
There's a bitwise logic page too: www.advanced-ict.info/interactive/...
More specifically, multiplying or dividing a number (N) in a given base (B) by B is the same as shifting that number (N) left and right along its number columns. For example, multiplying 1234 by 10 in decimal.
