A86: Find_Pixel Help And More! Please Help!
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A86: Find_Pixel Help And More! Please Help!
Okay. I know you guys have helped me alot already but theres a few more
questions I need answered. First I need to know how to pixel test
8 rows down from the place where my sprite is. If it's on I need the
program to go back to the main loop. If it's not then you need to go
down 8 rows. Can Someone give me an example of how to use the FindPixel
below to do that? Thanks Alot.
InFuZeD at Zone TI - "Making Basic Programming Worth While"
P.S. does Find_Pixel read the GRAPH_MEM or the LCD?
If the graph mem then I need major help!
;------------------------------------------------------
; FIND_PIXEL by CLEM
;
; 121 cycles 27 bytes Destroyes : none
;------------------------------------------------------
Find_Pixel:
ld h,63
ld a,c
add a,a
add a,a
ld l,a
ld a,b
rra
add hl,hl
rra
add hl,hl
rra
or l
ld l,a
ld a,b
and 7
cpl
rlca
rlca
rlca
ld (FP_Bit+1),a
xor a
FP_Bit:
set 0,a
ret
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