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- To: hatari-devel@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [hatari-devel] DSP question
- From: Miro Kropáček <miro.kropacek@xxxxxxxxx>
- Date: Tue, 26 Feb 2013 22:25:42 +0100
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Btw, when I decided to dig up my notes about this "issue", I found also another notes of myself, maybe they will help you Laurent with the timing code?
---
writing to the DSP host port:
byte/word -> dsp is faster than byte/word -> st ram (both byte and word take the same amout of time)
long -> dsp is much slower than long -> st ram
reading from a memory location, from fastest to slowest:
(byte) DSP -> 030
(byte/word) ST RAM -> register
(word) DSP -> 030
(long) ST RAM -> register
(long) DSP -> 030
ST RAM:
reading from ST RAM is much slower than writing!
---
Very loosely translated :)
--
MiKRO / Mystic Bytes
http://mikro.atari.org