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From: Thomas Koenig <tkoenig@netcologne.de>
Newsgroups: comp.arch
Subject: Re: Whether something is RISC or not (Re: PDP-8 theology, not
 Concertina II Progress)
Date: Wed, 2 Oct 2024 20:23:53 -0000 (UTC)
Organization: A noiseless patient Spider
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MitchAlsup1 <mitchalsup@aol.com> schrieb:
> On Tue, 1 Oct 2024 20:00:28 +0000, 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?
>
> It was pin limited and internal area limited; and close to being
> power limited (NMOS).

Somebody did a good job of optimizing it, then, at the limit of
several constraints.  Not necessarily a global optimium, though,
that could have been closer to the (much later) ARM.