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- From: paetau@mits.mdata.fi (Rasmus Paetau)
- Subject: Re: 16-bit RAM Access on Falcon ?
- Organization: Microdata Oy, Helsinki, Finland
- Distribution: eunet
- Date: Sun, 8 Nov 1992 19:42:26 GMT
- Message-ID: <1992Nov8.194226.5425@prime.mdata.fi>
- References: <1992Nov1.183817.15596@rhrk.uni-kl.de> <1992Nov5.213100.423@prime.mdata.fi> <1992Nov8.132805.1903@rhrk.uni-kl.de>
- Sender: usenet@prime.mdata.fi (Usenet poster)
- Nntp-Posting-Host: mits.mdata.fi
- Lines: 59
-
- In article <1992Nov8.132805.1903@rhrk.uni-kl.de> peter@rhrk.uni-kl.de (Gunter Bitz) writes:
- >>>
- >>>> Is it true that the Falcon030 only has 16 bit RAM Access ?
- >>>
- >>>Ok. My answer is simply : YES !
- >
- >>Excuse me, but where did you get that from? Sam Tramiel stated in the
- >>GEnie conference a long time ago that it has a 32-bit bus. Also,
- >>somebody tested Falcon with QIndex and got 471% for the CPU memory
- >>test, compared to a normal ST. I don't see how this could be possible
- >>with a 16-bit bus. So please tell me (us) where this information came
- >>from?
- >
- >I don't know what Qindex does, but I testet the following:
- >A short loop (which fits completely in the processor cache) like that:
- >ll:
- > move.w d0,(a0)+
- > dbf d7,ll
- >and another like
- >ll:
- > move.l d0,(a0)+
- > dbf d7,ll
- >
- >The result was that filling the same amount of memory with longwords is a bit
- >faster than filling with words, but not twice as fast as it should be on a
- >r e a l 32 bit machine. I'm sorry about that
-
- I'm no assembler guru, but doesn't the move.l instruction take longer
- time to execute than move.w? If it does then wouldn't that explain why
- it isn't twice as fast? Just correct me if I'm wrong.
-
- >I also know that Atari states that the Falcon is a real 32 bit computer.
- >I also asked a few people at the Duesseldorf Atari Messe and they told me the
- >same stuff. My opinion is that Atari tries the same way as Apple with their
- >'small' Macintosh.
- >Anyway most of the 'Users' don't recognize a difference between
- >a 16 or 32 bit bus.
-
- That would be a dirty trick, somebody is bound to discorver such a
- trick and then Atari would certainly get a not-so-nice reputation. I
- hope they aren't lying about anything.
-
- >Perhaps somebody might try the same as I did and report to this group !
- >
- >But anyway even with this small bus the Falcon is a interesting computer
- >and I personally will buy one anyway !
-
- I will definitely re-consider purchasing a Falcon if it does have a
- 16-bit bus.
-
- >cu
- > Gunter
- >
-
- --
- -----------------------------------------------------------------------
- | Rasmus Paetau (paetau@mits.mdata.fi) | Waiting for the Atari Falcon |
- -----------------------------------------------------------------------
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-