Ongoing A4000 saga.....

[Ilwrath]

First off:

Warren Block's A4000 reference page <-- The single best A4000 resource I've found.

I've also set J100(CLK 90 Clock Source)to external and J104 (CPU Clock Source) to internal... can someone confirm?

I believe both J100 and J104 should be set to external.  (AFAIK Both clocks come from the 3640 card, but I haven't found a site to confirm this.)

I've also tried with a different SIMM but the result was the same. Is it picky with mem modules?

Yes, it's very picky.  But if you get it wrong, it'll usually either mis-detect the chip mem size, guru, or cause a green-screen fault.

[Ilwrath]

Why is it that I only get 1MB chip ram?

Wrong SIMM in your CHIP RAM slot.  Like I said, it's picky.  If you get one it doesn't like, it'll detect wrong sizing.  You really need to get a 2MB one of identical stats to the original.

But is the A4000D workbench disk set the same as the A1200's ?

Yes, I believe so.  Back in the day, I used the disk set from my A1200 to format and install my brand new (used) A4000D for the very first time.  :-)  I don't remember running into any problems.  

Also, AFAIK, you can use the A4000T disk set on any Amiga, it'll just copy a couple files you don't need.  (You just can't use any disk set other than the proper one on an A4000T, though.)