MaxCoderz

That was a fun problem! Here is how i solved it.
However, I didn't use proofs or anything because i hated proofs and forgot most of them.

Slick.

You might be interested in looking at this site: http://www.maximumcompression.com

Acceleration (gravity) is fairly simple, once you know how it's done. Assuming that down is considered positive: (y-coordinate) + (y-velocity) = (new y-coordinate) (y-velocity) + (gravity constant) = (new y-velocity) To make the acceleration smoother, the object should move in "fractions of a p...

Considering all the registers that are in use, using shadow registers would likely be more of a hinderance than a help. Using the stack is probably the smallest and fastest way to store the address.

The largest bottleneck in your code is the usage of ix. The four lines after the loop label take 84 cc (clock-cycles). If you could use hl instead, the number of cc would decrease to 26. You would likely have to make use of the stack and/or the ex commands to do that.

Fine, so "add l,a" doesn't exist, but "add a,l" does. Sorry if the typo caused confusion. The "adc a,h / sub h / ld h,a" part just adds the carry flag to h. Also, the example was given for when all the other registers are in use. The second optimization not only saves 6...

I like the knight; he looks really detailed. However, I can't tell where his arms are.

if you are adding an unsigned number smaller than 256 to hl, or any 16-bit register, you could always do this: ld a,number add a,l ld l,a adc a,h sub h ld h,a you could also change this: Loop: LD C, (IX) ;Write current row to registers INC IX LD D, (IX) INC IX LD E, 0 LD A, (xbyte) Shift: ;Shift row...

When you say variable size sprites, can you do this:

This is very impressive! You have easily surpassed the monocromatic 2 demo already. I'm looking forward to seeing polygon clipping, something essential to making this engine really useful.

Floyd Maseda made a table called Warped.

Are you thinking of local lables?

That is way too funny.

My favorite platformer has to be the Commander Keen series, mainly because I was brought up on them. It also doesnt hurt that the games are still tons of fun to play. In close second is Super Mario 3, because it's SMB3