Extending memory on your DNARD (shark) to more than 64MB

A description of the shark memory design can be found at http://www.research.compaq.com/SRC/iag/info/dnaext/dnard/info/sdram.html (locally mirrored, in case the original goes away.)

After trying about ten different modules I found only two that got recognized by the shark as 64 MB each. Unfortunately they did not work together:

Virtual address already used
screen not found.
Can't open input device.
Keyboard not present.  Using com1 for input and output.
DEC,DNARD, 00:00:00:00:00:00 , 128 MB memory
Open Firmware  Built February 25, 1998 17:19:25
Copyright 1997 FirmWorks  All Rights Reserved

Unimplemented package interface procedure
ARM Forthmacs version F.0
Copyright (c) 1988-1997 FirmWorks
Copyright (c) 1993 by H. Schwalm
ok 

The PAL code on http://www.research.compaq.com/SRC/iag/info/dnaext/dnard/pal seems to indicate the RAM area could be 128 MB, and the firmware detects this amount - but unfortunately does not work in this configuration.

The working modules are called SY8464V and equipped with eight HY57V651520 chips (four on each side).

I ended up using one of the above 64MB modules and a 32MB one:
DNARD Rev. 5, 08:00:2b:81:62:5e , 96 MB memory
Open Firmware  Built February 25, 1998 17:19:25
Copyright 1997 FirmWorks  All Rights Reserved

Send a line break to stop the booting process.
Boot device: /isa/ide/disk@0:\netbsd.aout  Arguments: 
[ no symbols available ]
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.
...