[comp.sys.m68k] uprocessor selection

root@sbcs.UUCP (04/10/87)

> In article <383@sbcs.UUCP> root@sbcs.UUCP (Root) writes:
> ...
> >My personal loyalty is solely for the fastest (75%), cheapest (5%),
> >most standard (20%) silicon at any given point.
> 
> How about architecture?  Does that count for anything?
> 

	Like I said, I want a *fast* 32 bit environment..  With my application
	developers hat on, I say "Who cares about architecture??"..

> For instance, have you ever tried to use the 80286 in real mode when the
> size of your project exceeds 1MB of ROM/RAM.  Can you say "bankswitch"?
> Do you know what it takes to build a large bankswitched system?  I'd
> rather watch paint rust than sit at a terminal and link and locate my
> code N+1 times (N = number of banks of ROM).  And all of this hassle
> -- 
	
	Yes, Clark, I understand all of this (and quite a bit more :-). I helped
	develop a medical bedside monitor that made extensive use of coroutines,
	mucho bankswitching, and other yucky contortions all in Pascal on a 
	LSI-11.  The point of my previous message is that the average guy 
	writing the next Lotus-123 lookalike in C need not concern himself 
	with machine level monstrousities if the C environment is adequate
	for his application..  As for choosing a particular chip when
	your application permits it, I have found that other factors are
	more important than just instruction set elegance:  is there a 
	development system? is a compiler available? is the chip itself
	available (and if necessary, second sourced)? what is the overall
	systems hardware cost is using the chip?  what is the relative
	price/performance of different chips used in the context of the
	system under consideration?  what support chips are available for
	use with the chip? how much mfg support can I expect for the chip?
	how buggy is the current silicon (thinking of the 32X32 experience
	here)?

> Clark Morgan, Tektronix Lab Instruments Engineering  (503) 627-3904
> UUCP:    {decvax,cae780,uw-beaver}!tektronix!tekig4!clarkm
> US Mail: Tektronix, P.O. Box 500, DS 39-140, Beaverton, OR  97077

						Rick