|
|
Atari coding BBS
| Clear 1 bpl fast? |
|---|
|
Posted by: Per Almered (XiA)
|
Sep,12.2009-13:05
|
Hi, me again with another presumably basic question... *blush*
What IS the fastest way to clear a bitplane on an STE?
What I'm using now is along the lines of:
move.l screenaddress,a0
move.l #0,d0
move.l #200-1,d1
.loop
rept 40
move.w d0,(a0)
add.l #8,a0
endr
dbra d1,.loop
...which obviously could be made a handful cycles faster be unravelling the dbra loop, but would eat a LOT more memory, probably not worth it.
Is there a faster way? Can the blitter do this faster?
If I remember correctly, in SubStation, the programmers decided not to clear the screen using the blitter (that was 4 bitplanes tho, of course), because the speed gain was so small, and there was some other disadvantage (probably timer related) to using the blitter.
Can anyone shed some light on this?
Thanks in advance,
Per.
|
[All messages in this thread] [Start new thread]
|
Topic
|
Posted by
|
Date
|
|
Clear 1 bpl fast?
|
Per Almered (XiA)
|
Sep,12.2009-13:05
|
|
Re: Clear 1 bpl fast?
|
frank_c_b
|
Sep,12.2009-14:31
|
|
Re: Clear 1 bpl fast?
|
RA/pdx
|
Sep,12.2009-15:38
|
|
Re: Clear 1 bpl fast?
|
evil
|
Sep,12.2009-18:07
|
|
Re: Clear 1 bpl fast?
|
Per Almered (XiA)
|
Sep,12.2009-21:53
|
|
Re: Clear 1 bpl fast?
|
Per Almered (XiA)
|
Sep,12.2009-22:13
|
|
Re: Clear 1 bpl fast?
|
Frank_c_b
|
Sep,12.2009-22:37
|
|
Re: Clear 1 bpl fast?
|
Per Almered (XiA)
|
Sep,12.2009-22:43
|
|
Re: Clear 1 bpl fast?
|
frank_c_b
|
Sep,12.2009-22:47
|
|
Re: Clear 1 bpl fast?
|
Per Almered (XiA)
|
Sep,12.2009-22:56
|
|
Re: Clear 1 bpl fast?
|
frank_c_b
|
Sep,12.2009-23:06
|
|
Re: Clear 1 bpl fast?
|
Frank_c_b
|
Sep,12.2009-23:12
|
|
Re: Clear 1 bpl fast?
|
ggn
|
Sep,12.2009-23:02
|
|
Re: Clear 1 bpl fast?
|
Bod
|
Sep,13.2009-20:23
|
|
Re: Clear 1 bpl fast?
|
Per Almered (XiA)
|
Sep,14.2009-21:11
|
What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
|
