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Old 30 September 2010, 01:53   #24
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Join Date: Sep 2007
Location: Melbourne/Australia
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Originally Posted by Photon View Post
There's no reason why a 68000 series compatible CPU couldn't be made to run at GHz, except there's no market for one.

As Toni mentioned, the chipset trundles along at the same old comparatively measly speed. Even with fast enough RAM on the CPU board, the chipset's design really needs to be updated so that it still doesn't hog near 100% DMA time when the elaborately computed Unlimited Detail 3D Workbench/Game graphics is to be made available for Denise. Adding a simple VDU to the VDU card fixes that, and then suddenly you have not an enhanced Amiga but two computers inside an Amiga case...

I fully support remaking Amiga hardware in new components, and that includes the CPU. Nothing wrong with seeing new Motorola-CPUs making possible new accel cards.

Remaking the chipset is still the hard part and the holy grail to ensure a hardware future.

One way to enhance Amigas way beyond CPU upgrades would be to dev some hardware hack to 1) let CPU and chipset access chipram simultaneously (innovate some dual-bus RAM, or RAM shadow copy) or failing that, 2) some DMA thingy to "copy fast" like on C64 (but from fast to chip).
Yep a decent CPU on it's own will just turn the 'Amiga' into a (slow) frame-buffer

The problems with updating the original chipset (ie. FPGA...which is already happening with Natami and the FPGA arcade/MiniMig 2 and CloneA) are that if you go for a standard 100% compatible chipset then there isn't much point but the more you improve the original the harder it is to maintain compatibility. The other thing is that hardware is only half the problem, without new/updated software (including the OS) developed to take advantage of the new features (eg chunky display modes) it also becomes rather pointless I’m afraid

I think the last real opportunity to upgrade the original AGA chipset was with the release of OS 3.9 back in the year 2000 (eg OS 3.9 would have used the updated chipset).

Last edited by NovaCoder; 30 September 2010 at 01:58.
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