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- Newsgroups: comp.sys.amiga.hardware
- Path: netcom.com!skelsey
- From: skelsey@netcom.com (Steven L. Kelsey)
- Subject: Warp Engine RAM
- Message-ID: <skelseyDpL5wJ.6rp@netcom.com>
- Summary: Warp Engine DRAM configuration tips
- Keywords: Warp Engine, DRAM
- Organization: NETCOM On-line Communication Services (408 261-4700 guest)
- Date: Tue, 9 Apr 1996 08:21:55 GMT
- Sender: skelsey@netcom12.netcom.com
-
- Hi all,
-
- I have seen a few recent posts claiming that the Warp Engine's DRAM cannot
- be configured as one big contiguous chunk when two SIMMs are installed
- in certain combinations. I thought I might throw in my two cents.
-
- There are two jumpers (the second and third pair of pins on JP2) that
- select the SIMM slot addressing. One of the jumpers controls whether or
- not any of the installed SIMM's are dual bank (i.e. 8 or 32 MB). The
- other jumper controls whether or not any of the SIMM's are 16 MB per bank
- (i.e. 16 or 32 MB). If the jumpers are set correctly and the SIMM's are
- installed in a reasonable order, most combinations of SIMM's will result
- in one contiguous block of memory. A few combinations will result in
- two or three noncontiguous blocks. The Warp Engine has no limitation
- on how you mix 4, 8, 16 and 32 MB SIMM's. You can put them in any order
- and you can set the size and dual bank jumpers any way you want. The
- automatic DRAM sizing routines figure it all out. But some combinations,
- while completely legal and functional, are not optimal. So, if you
- configure your Warp Engine properly, you should be able to get the best
- performance possible.
-
- Example:
- If you have one or more 16 MB SIMM's (and possibly 1 or more 4MB's),
- you should set the size jumper to 16/32 (off) and the dual bank jumper to
- single sided (on). Then, install your 16 MB SIMM's first, followed by
- any 4 MB SIMM's. This will make all the 16 MB SIMM's and the first 4 MB
- SIMM (if present) all one contiguous block.
-
- There are many other combinations that work in a similar way. There are
- also some combinations that will result in two or more chunks of memory.
- The thing to remember is that you should propperly set the jumpers
- according to the types of SIMM's you have, and then install them in a
- reasonable order.
-
- I hope this helps some of you out there get the most out of your Warp
- Engine, and puts to rest some of the doubts and concerns some of you had
- about the Warp Engine's capabilities.
-
- Thanks,
-
- -Steve
-