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- From: spice@drycas.club.cc.cmu.edu
- Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.misc
- Subject: Re: RAM chips and the A3000
- Message-ID: <1992Sep4.174808.1979@drycas.club.cc.cmu.edu>
- Date: 4 Sep 92 22:48:07 GMT
- References: <copes.715597260@pride>
- Organization: Carnegie Mellon Computer Club
- Lines: 45
-
- In article <copes.715597260@pride>, copes@pride.cs.curtin.edu.au (Simon Cope) writes:
- >
- > spice@drycas.club.cc.cmu.edu writes:
- >
- >I understand
- >>that the static column chips support burst mode and thus are 10% faster
- >>than the nybble & page mode chips. But I believe I've seen a post here
- >>on the Net which stated that due to a bug in the RAMSEY chips of early
- >>A3000s (like mine) that causes the burst mode not to be used. Can anyone
- >>especially from Commodore confirm this?
- >
- >> Thanks
- >
- >> Scott Corley
- >
- >>spice@drycas.club.cc.cmu.edu
- >
- > That's right, although the naming conventions of the different modes are often
- > confused. If you get hold of SetRamsey by Nic Wilson off a fish disk, it will
- > report the 'standard' configuration as burst mode. This is 'page' mode (I
- > think), and is set by diag at startup. It is the only one set, because this
- > mode works on all A3000's. What Nic refers to as 'Static Column' mode is burst
- > mode, in which ramsey utilises the scram chips. Setting this mode will give
- > you a speed increase. On my machine (latest rev.) I get the fastest speed by
- > setting 'static' mode on, 'burst' mode off. This gives a 10% speed increase
- > over the 'standard' config. I tried this mode on an earlier machine, and it
- > ran fine, but SuperDmac no longer functioned and we couldn't use his hard
- > disk. Real handy. For older machines, you should be able to upgrade the chips
- > to the newer versions. However, I suspect the problem is with Dmac, and not
- > with Ramsey, as the machine still ran, but dmac stopped working.
- > On my machine, if I run both modes on, the machine runs slower. This doesn't
- > seem right.
- >
-
-
- Simon, I'm not usimg SetRamsey but what you've told me seems to jibe with
- what I had heard earlier about problems with early A3000s and static
- column mode. If static column mode doesnt work properly in early A3000s
- then what's the use of buying static column chips? They are more expensive
- and much harder to find than page or nybble mode chips.
-
-
- Scott Corley
-
- spice@drycas.club.cc.cmu.edu
-