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Atari coding BBS
| x+y ploting |
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Posted by: gloky
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Apr,08.2009-16:39
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; d0 =x*4 d1 = y*2 from the begining
RTS equ $4e75
;a1 = bset dn,ofx(a0) * 320
;a2 = 160*y
move.l (a1,d0.w),d0 d0='bset.b dn,dep(a0)'
add.w (a2,d1),d0 + offset Y
move.l d0,(a3)+ ; a3 = cg
...
move.w #RTS,(a3)
set d0-d7 with apropriate bit or number
jsr cg
...
lot of bset dn,dep(a0)
usable to ploting dots in 1 plan
or in 2 plan for exemple
selecting one part of bset code
with calling and rts
and a0 = screen+4 for exemple
inconveniant: lot of ram used for the cg
anyway we can do in multiple pass
this is gloky style
good night
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