>I installed a RamStack memory board in my Lisa 2/10 in order to have
>2Mb Ram. When I boot, I have a CPU error 43 but I'm still able to
>continue the boot process by manually choosing the disk I want to boot
>from. I was able to boot from a MacWorks disks and I confirmed that
>2Mb ram were present.
>
>Does anyone know why I get such errors ? do I have to install some
>driver for the board ? Is there a way to correct the CPU error
>problem ?
There is no driver to install, properly configured memory is recognized "automatically" by the CPU board ROM.
IIRC, the RamStak can be configured with 0.5, 1, 1.5 or 2MB. If you have a second memory board installed, try removing it, leaving only the RamStak. This is to test whether the current memory configuration of the RamStak is in contention with the other board.
If you have a voltmeter, check that +5 is within +/- 200 mV.
If the error persists, then I suppose you would need to do some chip-level troubleshooting.
HTH, James
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