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From: Pancho <Pancho.Jones@proton.me>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: RP2350 and Pico 2 - things missing
Date: Fri, 30 Aug 2024 16:20:51 +0100
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In-Reply-To: <vaslu5$hfl3$2@dont-email.me>

On 30/08/2024 15:45, The Natural Philosopher wrote:
> On 30/08/2024 15:39, mm0fmf wrote:
>> On 30/08/2024 14:28, John Aldridge wrote:
>>> In article <20240829191334.570e88c7507598ffe5b28d87@eircom.net>,
>>> steveo@eircom.net says...
>>>>>>     Portable code should only rely on the standards not
>>>>>> implementations, some very weird possibilities are legal within the
>>>>>> standard.
>>>>>
>>>>> Heh, yes. I worked for several years on a machine where a null pointer
>>>>> wasn't all bits zero, and where char* was a different size to any 
>>>>> other
>>>>> pointer.
>>>>
>>>>     That rings vague bells, what was it ?
>>>
>>> Prime. It was word, not byte, addressed, so a char* had to be bigger.
>>>
>> I used a Prime750 at Uni. But only undergrad tasks in Prime BASIC and 
>> some Fortran. It seemed quite fast at the time in timeshare mode with 
>> plenty of undergrads using it. But the CPU was only as fast as an 8MHz 
>> 68000!
>>
> That is the staggering thing. CPU performance in the mini era wasn't 
> that hot at all.
> 
> I see someone has made a Pi PICO emulate a range of 6502 based computers 
> - apple II etc.
> 
> I am fairly sure a PI Zero could outperform a 386 running SCO Unix...and 
> that was pretty comparable with - if not better than - a PDP 11.
> 
> 

The 386 slaughtered most of the Unix Minis of the time.

The PDP 11 was already a legacy predecessor of the Vax, did they even 
have demand paging? PDP 11s were around in some of the companies I 
worked for, but they were for the old codger programmers (i.e. 30+).