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- Path: Norway.EU.net!usenet
- From: patrick.hanevold@login.eunet.no (Patrick Hanevold)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Demo/game to OS frien
- Date: 28 Feb 1996 14:56:26 GMT
- Organization: EUnet Norway
- Message-ID: <771.6631T616T2586@login.eunet.no>
- References: <38232498@kone.fipnet.fi> <4gctlm$bcn@oreig.uji.es>
- <38232604@kone.fipnet.fi> <4gj3ve$f9c@sunsystem5.informatik.tu-muenchen.de>
- <642.6629T546T2374@login.eunet.no> <4gpjgi$19c@serpens.rhein.de>
- <265.6630T583T838@login.eunet.no> <4gt2ub$ban@serpens.rhein.de>
- NNTP-Posting-Host: pc2.asker-pm2-1.eunet.no
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
-
- >>>>Tell me, how do you copy memory with only writes. :)
-
- >>>With a write buffer ? :)
- >>>You can copy memory from fast to chip with 7M/s.
- >>Explain.
-
- >Just try this on an A3000. The trick is that for writing to
- >chip memory the CPU databus is only occupied for a short time.
- >If you would immediately start another write it is delayed for
- >the next chip memory slot. But it is possible to do a fast memory
- >read and still be fast enough to not miss the next chip memory
- >slot.
- >That means, a copy loop transfers 7MByte/s.
-
- >This is not true on the A4000/040. Probably an effect of the
- >A3640s bus interface.
-
- Not true on my BlizzardIII/030 either.
-
- <sb>Patrick Hanevold - Virtual Reality developer
- <sb>patrick.hanevold@login.eunet.no
- <sb>Amiga and official Be developer
-
-