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- From: cg18ffl@icogsci1.ucsd.edu (Spumoni...)
- Newsgroups: comp.sys.amiga.misc
- Subject: 3000 Performance results
- Message-ID: <42976@sdcc12.ucsd.edu>
- Date: 2 Jan 93 08:11:44 GMT
- Sender: news@sdcc12.ucsd.edu
- Followup-To: comp.sys.amiga.misc
- Organization: University of California, San Diego
- Lines: 48
- Nntp-Posting-Host: icogsci1.ucsd.edu
-
-
- Since I have gotten a few requests to report information on ways to
- speedup the 3000, I'll outline what I've learned from various posters, in the
- hopes this info will help somebody out there.
- (I'd like to thank Daniel Barrett, Ed Brown, James P. Schaeffer, and Mike
- Noreen for the helpful hints)
-
- 1) Copy the ROM to 32-bit ram. The command for this is 'cpu fastrom'. If you
- have a softkicked 3000 this will not be necessary, as the ROM is already
- resident in memory. This makes some OS operations a bit faster, window
- redrawing is a bit snappier. (correct me if this is a result of turning the
- caches on)
-
- 2) Using the same setcpu command, you can turn on the instruction and data
- caches (and burst modes) of the 68030. Certain operations are thus speeded up
- by about 10%, but the caches can cause incompatibilities, especially with the
- module replaying routines used in many games. You'll know when they start
- missing notes to turn the caches off. Oh, the command for this would be
- 'setcpu cache burst' (tack on #1 if desired)
-
- 3) This is one that is probably common knowledge. Use CpuBlit (by Eddy
- Carroll) to let the cpu handle text scrolling. It will be much faster, many
- times even faster than 20-30 percent. It also eliminates 'bitplane flashing'
- by blitting bitplanes 4 at a time. CpuBlit comes as part of the Ncomm2.0 and
- Term 2.4b comm programs.
-
- 4) Issue the command 'addbuffers <name of HD partition>: 230.' Stick this
- early in your s-s or issue it from the CLI. I was surprised at how much this
- speeded up the disk accesses. Reading large directories consumed noticably
- less time.
-
- 5) For those of you with the newer RAMSEY revisions (use Sysinfo 3.01 to test
- this) there is also a setting, I think, called 'page detect mode on'. This
- will give an additional speedup of about 10%. However, on older A3000's (and
- even new ones, like mine (!)) turning on this feature (due to a mysterious bug
- in Ramsey) will cause weird and wonderful GURUs. If you want to mess with it,
- use a program like ScRAMmer to play around with the Ramsey settings.
- Otherwise, leave it alone. (see why I put it last? :))
-
- Hmm, I think this about covers it. If any of you have any corrections,
- additions, or comments, shoot. I'm not afraid to duck. :)
-
-
- -------------------------------------------
- ...nverenin@sdcc13.ucsd.edu
-
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