🚀 go-pugleaf

Hi Robert,

> I have recently acquired an IPX (Sparc 4?) running SunOS 4.1.  As it only
> has 16MB of RAM, and has 3 nice 72pin simm slots available, I stuck in
> some EDO RAM (what the heck!?8-).

> The firmware recognizes the additional memory, and correctly prints out
> 48MB (and/or 32MB -- I was trying different physical configurations)but
> the kernel refuses to boot (it pretends to, and then just hangs).  I have
> looked for information in the various man pages, have inspected the
> GENERIC config file, and done a `words' list on the somewhat FORTH like
> boot firmware, to no avail.  Can anyone advise me as to what I might be
> doing wrong -- like perhaps I need proprietary RAM?? 

You don't need proprietry RAM. Regular non-EDO 4 or 16 meg 72-pin parity
(33-bit) SIMM's will work. I'd be surprised if EDO SIMM's will work
properly in any Sun machine, but I guess it depends on the limits of the
DRAM controller hardware.

You might like to try, just for the sake of experimentation, removing the
original SIMM if it's non-EDO (I'd guess that it is non-EDO) and
installing just the EDO SIMM(s) to see what happens. 

Regards,

Craig.

--
            Craig Dewick. Send email to 'cdewick@lios.apana.org.au'
   Point a web browser at 'http://lios.apana.org.au/~cdewick/sun_ark.html' to
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