home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.sys.amiga.hardware:15132 comp.sys.amiga.misc:13706
- Path: sparky!uunet!cbmvax!mks
- From: mks@cbmvax.commodore.com (Michael Sinz)
- Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.misc
- Subject: Re: RAM chips and the A3000
- Message-ID: <35009@cbmvax.commodore.com>
- Date: 10 Sep 92 13:22:42 GMT
- References: <copes.715597260@pride> <34903@cbmvax.commodore.com> <copes.715930764@marsh>
- Reply-To: mks@cbmvax.commodore.com (Michael Sinz)
- Organization: Commodore, West Chester, PA
- Lines: 31
-
- copes@cs.curtin.edu.au (Simon Cope) writes:
- >I would like this chance to thank Dave Haynie and Michael Sinz for explaining
- >the A3000 fast ram 'problem'. It is about time this was cleared up properly,
- >and I know that I for one am going to remove SetRamsey from my startup file.
-
- I think you will find this to be a wise move...
-
- >Dave and Michael are correct about the performance differences. When I said it
- >was 10% faster, I was referring to Sysinfo's relative indexes, which are mostly
- >based around a 'Mips' type test. Note however that with that mode enabled, it
- >reads a lower ram speed. So overall, it would probably run slower, not faster.
- >Thank you for explaining this.
-
- You are welcome. I just wish we did not have to repeat ourselves so much.
- Maybe some of this needs to be put into the FAQ...
-
- >BTW, does the C= 040 board have an external cache and any ram on board? The
- >latest AmigaWorld I could find here was July.
-
- The 68040 board does not have CACHE or RAM on it. It is designed to not
- cause any extra wait-states to the motherboard (which is not easy since
- the 68040 bus has to be converted to the 68030 bus within the timing
- window of the 68040 cycles...)
-
- /----------------------------------------------------------------------\
- | /// Michael Sinz - Senior Amiga Systems Engineer |
- | /// Operating System Development Group |
- | /// BIX: msinz UUNET: mks@cbmvax.commodore.com |
- |\\\/// |
- | \XX/ "I think not." said Ren'e Descartes, then he vanished. |
- \----------------------------------------------------------------------/
-