> On Sep 15, 2016, at 5:57 PM, Toby Thain <[email protected]> wrote:
>
> On 2016-09-15 2:38 PM, Noel Chiappa wrote:
>> > From: Chuck Guzis
>>
>> > Call it anything you want, but we know what Motorola called it.
>>
>> The _first implementation_ may have been 16-bit, but I am in no doubt
>> whatsover (having written a lot of assembler code for the 68K family)
>> that the _architecture_ was 32-bit:
>>
>> - 32-bit registers
>> - many operations (arithmetical, logical, etc) defined for that length
>> - 32-bit addresses
>
> GPR width, being the visible programmer model, is the most common and
> convenient definition of "architecture" I've come across. But there's no
> reason we can't just say the *visible* architecture is 32 bit (which it is),
> but the "internal" architecture is sort of 16.
So would you call a PDP-8/S a one bit machine? I suppose you could, but that
seems rather odd.
paul
