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- From: jheadley@dvorak.amd.com (James Headley)
- Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.misc
- Subject: Re: RAM chips and the A3000
- Message-ID: <1992Sep4.154903.6502@dvorak.amd.com>
- Date: 4 Sep 92 15:49:03 GMT
- References: <copes.715597260@pride>
- Organization: Advanced Micro Devices, Inc.; Austin, Texas
- Lines: 54
-
- In article <copes.715597260@pride> copes@pride.cs.curtin.edu.au (Simon Cope) writes:
- >
- >spice@drycas.club.cc.cmu.edu writes:
- >
- >>I need to add more memory to my A3000 and I'm having trouble finding
- >>1meg x 4 Static column ZIP ram chips at a reasonable price. I have been
- >>able to find nybble and page mode ZIP ram chips easily. 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? Also could you give me the name
- >>and phone number of a company selling static column chips?
- >
- >> 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.
- >
-
- I have a problem where I cannot enable both cache and burst mode (using
- setcpu command). Could it be that this is because I have an old version
- of Ramsey? If I enable one or the other it functions fine and the
- performance is slightly different with each setting but with both set
- my system immediatly reboots itself! Origionally I thought it was due
- to the memories I just added. I bought my machine around the time they
- first came out (A3000-25, 100Meg HD, was 5Meg RAM - now 13 Meg). Does
- anyone know if an upgrade is possible and how to go about it? My local
- Amiga store is a little weak.
-
-
- ------------------------------------------------------------
- Sure my PC can multitask but not with more than one program at a time.
- There's a remote possibility that these words are mine but,
- they are definitly not my employers...
-
- jheadley@dvorak.amd.com
-