INTL 3:770/1 3:770/3   
   REPLYADDR ldo@nz.invalid   
   REPLYTO 3:770/3.0 UUCP   
   MSGID:  3897d3ea   
   REPLY:  605719b0   
   PID: SoupGate-Win32 v1.05   
   On Mon, 23 Dec 2024 03:26:11 +0000, Brian Gregory wrote:   
      
   > On 18/12/2024 06:22, Lawrence D'Oliveiro wrote:   
   >   
   >> On Sun, 01 Dec 2024 15:11:05 +0000, Richard Kettlewell wrote:   
   >>   
   >>> The Natural Philosopher  writes:   
   >>>   
   >>>> I also remember a zilog Z8000?   
   >>>   
   >>> Yes, although also with a segmented memory model.   
   >>   
   >> Its segmentation scheme made Intel x86 look good.   
   >   
   > Not that unusual. Compare to some of the Microchip PICs. Some have   
   > really bizarre bank switching arrangements and so on.   
      
   I think the Apple II RAM expansion card worked by switching to a different   
   bank (48K each?) every time a particular control register byte was   
   written. You couldn’t just write a bank number: instead, you had to repeat   
   the write N number of times, and I guess remember where you started from,   
   to get to the right bank.   
      
   But this was because the CPU itself only supported 16-bit addressing. What   
   was Zilog’s excuse?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)   
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