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- Newsgroups: comp.sys.sun.hardware
- Path: sparky!uunet!gatech!rpi!batcomputer!bouncer
- From: eirik@elf.TN.Cornell.EDU (Eirik Fuller)
- Subject: Helios memory board configuration
- Message-ID: <1993Jan11.184356.17347@tc.cornell.edu>
- Sender: news@tc.cornell.edu
- Nntp-Posting-Host: dumpster.tc.cornell.edu
- Organization: Cornell Theory Center
- Date: Mon, 11 Jan 1993 18:43:56 GMT
- Lines: 24
-
-
- I have a 24 megabyte Helios memory board for the Sun3/100 series, and
- unfortunately I didn't get a manual with it. It is currently set up
- so that it provides a 28 meg system with a 4 meg CPU board. I would
- like to use it in a 32 meg system if possible.
-
- It seems as though a 24 meg board should be able to provide either a
- 28 meg or 32 meg system, depending on how much other memory there is.
- I have a 32 meg 3/110 with a 28 meg Clearpoint board, so I know 32
- megs with a 3/100 series CPU is possible; I just don't know whether
- this Helios board can be configured for a start address of eight megs.
- I did find a setting which resulted in a 26 meg system (presumably
- intended for 2 meg CPU boards), but I didn't find one for 32 megs.
-
- The part number of the Helios board is ASM 9005-24 (REV A). The 24 is
- written in, not etched into the board, which suggests that the board
- was shipped with varying amounts of memory soldered in, and the DIP
- switches tell, in part, how much of it is present. Based on my
- experiments, at least one of them seems to specify a starting address.
-
- What I would like is either a way of telling the Helios board to use
- the last 24 of 32 megs of memory, or a way of telling my 4 meg SCSI
- board to use the last 4 of 32 megs (but the latter seems unlikely).
- The part number of the Sun memory board is 501-1122.
-