Zexx Moore

Thanks for the manual link NoLand. I just recently bought Lance Leventhal's 6502 book on ebay, but I'm not too far in yet. Regarding the latch, in the atari course I'm taking, I don't recall that being mentioned yet thus I have no idea of it's importance at this time.

Well, NoLand, that was fantastic. I wish I would have explored the clocks, I thought about it, but I was hunting a five and let the opportunity pass. Much appreciated NoLand.

I'm having a challenge understanding the divide portion of this code. LDA PlayerXPos AND #$7F STA WSYNC STA HMCLR SEC DivideLoop: SBC #15 BCS DivideLoop EOR #7 ASL ASL ASL ASL STA HMP0 STA RESP0 STA WSYNC STA HMOVE The video I watched stated that you wanted the remainder for the "fine" positioning, which I believe is -8 to +7. If I use the value 20 for PlayerXPos, I expect a remainder of 5, as 15 goes into 20 one time with a remainder of 5. After doing the exclusive or, and the four left shifts, I end up with the value 0001 for the upper 4 bits, not five. If I worked from 30, and subtract 10 to arrive at 20, then that's out bounds of the negative range, thus it would have to be 15 + the remainder 5. I don't yet know why the one's complement is taken of the lower three bits, nor where my thinking is flawed, but it's flawed alright.