🚀 go-pugleaf

In article <1992Nov13.074541.13733@ncsu.edu>, hgm@ncsu.edu (Hal G. Meeks) writes...
>I have a 2052 memory card sitting here, waiting for something to do. I own a
>3000, which could use more memory. I know the 16bit ZorroII memory card will
>work in the 3000, but what kind of penalty am I facing in terms of
>performance by using it?
> 
>--hal
> 
>-- 
>hgm@ncsu.edu   "This is a beta signature, and as such, no guarantee can be
>	        made as to the worth and durabilty of this text."

(This is my first attempt at writing a reply on USENET, so please bear with me).

As far as I understand it, accessing 16-bit wide memory with a 32-bit will 
effectively halve your performance, since the processor has to fetch 32-bit each
data segment in two 16-bit segments, doubling the amount of CPU cycles needed 
to access memory (cf. Amazing Amiga, 6(11) November 1991, 67.)

Nikolaj 

In article <1992Nov13.074541.13733@ncsu.edu> hgm@ncsu.edu (Hal G. Meeks) writes:
>I have a 2052 memory card sitting here, waiting for something to do. I own a
>3000, which could use more memory. I know the 16bit ZorroII memory card will
>work in the 3000, but what kind of penalty am I facing in terms of
>performance by using it?

5-10 years at hard labor...  

OK, maybe nothing quite so horrible.  Speed-wise, the A2052 or any other Zorro
II RAM board will run at about half the speed of unsaturated Chip RAM.  
Effectively less if you run code from it.  Power-wise, the A2052 is a power
hog, and will gobble roughly 3Amps at 5VDC from your A3000 (you have a total
of 17.5 of those Amps to spread around).  It will also have the side-effect
of turning your A3000 into a space heater, which may or may not be a good thing
depending on the normal room temperature you live with.
-- 
Dave Haynie / Commodore Technology, High-End Amiga Systems Design (cool stuff)
 "The Crew That Never Rests"  {uunet|pyramid|rutgers}!cbmvax!daveh   BIX: hazy
		SCIENCE:	"I'll believe it when I see it"  
		RELIGION:	"I'll see it when I believe it"