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Old 19 July 2018, 10:50   #1
carrion
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Blitter vs CPU in BLitz

Hello fellow Blitz coders
Reading the thread about collisions, optimizations I started to wonder how much faster would be to use simply a CPU on 030 + Fast RAM A1200 rather than a bitter to paste a Bob?

I will do probably some tests myself but I wonder if you have any experience, ideas how to implement it or maybe even done that before?
Maybe there's a way to theoretically measure it somehow before coding it to check if it makes sense at all.

my question comes from and idea for a shooter game I dream to create one day but classic OCS A500 will be not enough I'm afraid.
But what to expect in terms of speed say on a machine like A1200 + 030 / 28MHz?
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Old 19 July 2018, 12:08   #2
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The Mildred library is made exactly for that.
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Old 19 July 2018, 18:10   #3
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I remember reading somewhere that at 030 and beyond, the CPU can move / modify memory quicker than the blitter. I don't recall the source. Presumably the vagaries of fast vs chip memory mean there are exceptions.
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Old 20 July 2018, 14:55   #4
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@idrougge
I'll look into it

@e-penguin
I think I saw it here on EAB on other coding threads (I'm even sure and
http://eab.abime.net/showthread.php?t=87929

google also finds some threads at ADA forum. So after reading it I have some general idea, and looks like blitter is still quite fast if only A500 or A1200 are considered.
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Old 21 July 2018, 01:08   #5
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Blitter vs CPU was a recurring topic for the entire lifetime of the Blitz mailing list. It is archived on Aminet and I recommend it as reading for whenever you have some time. It's almost like a second manual.
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Old 21 July 2018, 08:57   #6
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Any hint on how to find the right thread?
googling for "Amiga, Aminet, Blitz, mailing list" gives many lha packed discussions.
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Old 21 July 2018, 21:19   #7
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Unpack them and search through them.
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