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Subject: Re: Whether something is RISC or not (Re: PDP-8 theology, not
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On 10/1/24 3:00 PM, Thomas Koenig wrote:
> MitchAlsup1 <mitchalsup@aol.com> schrieb:
> 
>> A 32-bit bus would have priced the 68K at 30%-50% higher simply
>> due to the number of pins on available packages. This would have
>> eliminated any chance at competing for the broad markets at that
>> time.
> 
> Would have an external 16-bit bus and an internal 32-bit bus have
> been advantageous, or would this have blown a likely transistor
> budget for little gain?

Saving an extra pass through the 16 bit ALU for a 32 bit operation would 
be faster. Assuming that you didn't have to wait for another bus cycle 
to get the other half of an operand.

Making it faster for register to register operations and not much else.

-- 
http://davesrocketworks.com
David Schultz