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Just make sure to either use the same Vbb/non-Vbb Agnus, or add/remove capacitor C9 when needed. Also, make sure that the 8375 Agnus you want to use is really a 2M type - there are versions with that part number that have the 8372a pinout and only 1M addressing capability. These won't work.
Thank you - this very useful
I didn't try Cloanto as usually Amiga forums are very helpful for these things and i think some of the people on the forum work for Cloanto.
I am very happy with the ACE2B - can I swap the NTSC for a PAL or is there anything different? I can go into early startup and switch to PAL though which isn't too much trouble (You can go to early startup on a CDTV provided you have a floppy in the drive)
depending on your extended rom in the cdtv there is a kickstart module called kludges that reduces the amount of fast ram available in certain circumstances. Something in your system may have triggered that module.
Thank you! 
The English Amiga Board were very helpful - it is indeed the extended rom version - you must use V2.7 and not V2.30 (V2.30 was designed for the A570 so maps 2MB to an expected 40PIN expansion) 
Ok, booting from floppy worked fine - 8MB Fast, 2MB Chip
Would you be able to look at my startup-sequence for my cd please?
Hi,
It is showing as:
Available: 2MB Chip, 6MB Fast, 8MB Total
Maximum: 2MB Chip, 8MB Fast, 10MB Total
In use is showing about 72K Chip, 2MB Fast
Something is eating the 2MB fast - i have looked in my RAM drive but it's only using about 13K
Is there a way of showing what processes are using the 2MB Fast?
Thanks I will check that - it could be something in my startup but i have not changed anything from before i put in the chip (I suppose it could just be a bug in the old 3.1 Kick/Workbench)
