🚀 go-pugleaf

In article <SARREL.89Jul10202542@sioux.cis.ohio-state.edu> sarrel@sioux.cis.ohio-state.edu (Marc Sarrel) writes:
>SE.  How much performance difference is there between a 16MHz 68000
>and a 16MHz 68020?

	Roughly a factor of two, on the side of the 68020.


>problems.  You have to buy more memory to put on the separate board to
>take advantage of the wider data path and at least one manufacturer

	The Radius Accelerator 16 for the Mac Plus doesn't require
additional memory; it has a 32K SRAM cache for performance, with no
sockets for additional memory. This was a win for Radius (IMHO) for
two reasons:

	- When SIMMS were in short supply, they were one of the few
	accelerator makers who were able to keep up their volume
	of boards.

	- Not relying on SIMMs for additional memory keeps the cost 
	down.

>expensive). There were also compatability problems.  Even some
>software that would run on a Mac II, would not run on a Plus with some
>68020 accelerators.

	The Radius Accelerators are fairly compatible; the new ROMs for
the Plus model are a big improvement.

>Are 68000 accelerators a cost effective alternative?  Can you get

	It depends on the performance. 68000 boards to tend to be
half the price, but they're also have the speed. Besides that, a 68020
board with a 68881 or 68882 sitting on its coprocessor bus will do
floating point much faster than a 68000 with the FPU mapped in as
a peripheral.

	I have no association with Radius except as a satisfied customer
and occasional beta site.

		-Rich
~~~~~~~~~~~~~~~
 Rich Siegel
 Staff Software Developer
 Symantec Corporation, Language Products Group
 Internet: siegel@endor.harvard.edu
 UUCP: ..harvard!endor!siegel

 I classify myself as a real developer because my desk is hip-deep in
 assembly-language listings and I spend more than 50% of my time in TMON.

~~~~~~~~~~~~~~~