GVP Impact A3001 memory upgrade help

[melange]

I have one of those, try disabling the onboard RAM on your 2000.  The Jumper J500, this will unfortunately disable the real time clock as well, but might help, worth a try :-)
It disables the 512K RAM at $C00000.

See if it hangs still.

[melange]

Just looked at the Jumpers for the A3001 and it says for 8MB that Ram slots CN3 through to CN10 should all be populated and J5 ON.

And it (8MB of 1M simms) is not supported if you have a 50mhz processor.

Just looked at that again, and I had it wrong, CN3-CN10 are of course Ram slots not Jumpers corrected above statement.

looks like you've done the right thing, but there are a lot of Jumpers to do with clock speed, and seeing as the setup your trying to use isn't supported by 50mhz processor, I'd check all jumpers associated with clock speed and ensure you have them set correct.

[melange]

Apparently the A3001 is also compatible with special UNIX Boot ROMs as found on the Commodore A2620 or A2630.  I've never been able to locate the ROM code, or I'd give it a try, just for the hell of it. :-)

[melange]

The card uses special GVP 30pin Simms if I remember correctly.  Not many compatible types around from what I have read.