Manuel wrote:
>Good thing as well, but it is missing the overhead for switching the flicker on/off :)
Okay, no problem:
ldy colour ;May be a constant?
lda framevariable
adc flicker_on_off
sta framevariable
bmi skip
ldy #0
skip
sty COLUP0
flicker_on_off = #%00000000 ;Flicker is off
flicker_on_off = #%00010000 ;Flicker is on, slow
flicker_on_off = #%01000000 ;Flicker is on, fast
You can change the rate of flicker if you want to (ie: have the rate of flicker increase as they get closer to moving).
Of course that's using another variable but he's probably got a flicker on/off variable anyhow. Though it may be only be a bitflag which this is not, obviously. But turning it into one would be trivial though at the cost of a variable flicker-speed.
ldy colour ;May be a constant
lda flicker_on_off
and #%00000001 ;Or wherever the bitflag is
beq skip
lda flickervariable
adc #%01000000
sta flickervariable
bmi skip
ldy #0
skip
sty COLUP0
Chris....
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