Re: [stella] Ms. Pac Man, Mr. Do, striped playfields, and one-line kernels

[Christopher Tumber <christophertumber@xxxxxxxxxx>]

>How the heck did they fit that in? You can't change both GRP0 and GRP1
>to the appropriate rows of two arbitrarily positioned and distinct 
>sprites between WSYNC and the end of horizontal retrace. No way. 
>Uh-uh. You just... can't. 

As mentioned, VDEL is your friend here.

In addition, you can do something simple like shifting your code around:


lda SpriteBuffer0,x  ;setup for GRPN write on next scanline
tay
lda SpriteBuffer1,x
sta WSYNC         ; next scanline
sty GRP0
sta GRP1
inx    ;x = scanline #


Chris...