| From: | Rune Zedeler |
| Date: | 6 Jul 99 at 01:29:21 |
| Subject: | Re: [amos-list] Faster Blitter? |
From: Rune Zedeler <rune@zedeler.dk>
On 05-Jul-99, Andrew Crowe wrote:
> I could really do with a way of speeding the blitter ops up, and I'm
>wondering, doesn't AGA have a birst mode that speeds up blitter access by
>x4 or something?
Nope, the blitter is right as slow as it was in the very first A1000 :-(
You probably think about the fetch modes.
If you are running in high resolutions then the birplane DMA steals some time
from the blitter ops - and the blitter works slower. The higher fetch mode the
lesser time the DMA steals. I hardly think it possible to change the
fetchmodes in AMOS.
in the lowest fetchmode (in which AMOS runs) you can run in upto 16 colours
lowres or 4 colours highres with full blitter speed.
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________/ /// \\__/ \\\ ---/ \�-_ Rydev�nget 3,3th
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) / // | \ ` / || \ \\ Lemmus of Efreet - Denmark
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