Author: Bo Persson
Date: 09:48:34 03/10/00
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On March 10, 2000 at 03:26:11, Tom Kerrigan wrote: >On March 10, 2000 at 02:12:39, Jeremiah Penery wrote: > >>On March 10, 2000 at 00:08:56, Albert Silver wrote: >> >>>Not that this constitutes any real evidence, but back when Mephisto was making >>>the Dallas and Roma on 68000s they described them as 16-bit and the 68020 as >>>32-bit. >> >>And, since someone mentioned the Sega Genesis in another portion of this thread, >>it ran on the 68000, and was called a 16-bit machine. > >Yeah, back in the day, people were a little confused about what to call stuff. > >For example, when Apple started using the "clock doubled" 040s, they weren't >real sure if they were supposed to advertise the FSB speed or the processor's >internal clock speed. They ended up calling a lot of processors 33MHz, when it's >clear to us today that they are 66MHz processors. > >I think the reason people call the 68000 16-bit is because it only has a 16-bit >data bus, so it's not "pure" 32-bit. But I do believe that the register busses >inside the chip, and the ALU, are 32-bit. > >-Tom No, I think the 68000 had a 16-bit ALU, but the architechture was ready to go 32-bit later (68020). Please look at Motorolas site, http://www.motorola.com/General/Timeline/hist_70.html#79A Where they state: "1979 Motorola introduces its first 16-bit microprocessor, the 68000." Bo Persson bop@malmo.mail.telia.com
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