Thread: Amiga Vs ST
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Old 30 July 2009, 09:58   #185
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Join Date: Jun 2008
Location: Boston USA
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Originally Posted by Si-Pie View Post
The Amigas blitter is 2x more efficient at copying and 3 x more efficient at masking sprites.
Assuming no DMA contention. Bitplane DMA contention slows the blitter on the Amiga down a fair bit. The STE one is a full implementation of bitblt with some extensions. It has a nice indirect addressing mode called smudge mode which can be used for very fast bitplane mirroring/scaling. A one pass cookie cutter mode would have been nice but the blitter on the STE gets an undeserved bad rep* It can hit the whole 24 bit address range (RAM/ROM/IO registers) too.


*yes it can bit shift for free before soemone brings that up!
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