Morotola 680x0 series page sizes

By: Ben LaHaise (bcrl.delete@this.kvack.org), May 3, 2021 4:51 pm
Room: Moderated Discussions
Ben LaHaise (bcrl.delete@this.kvack.org) on May 3, 2021 5:36 pm wrote:

...
> I recall the first MMU Motorola built for the 68k series had support for several variable
> page sizes, but later CPUs dropped support for all the oddball page sizes and ended up being used predominantly
> with 4KB pages for Unix / Linux.

I looked it up in my old Motorola manuals, and the 68030 still supported 8 page sizes from 256 bytes to 32KB, but the 68040 dropped support for all but 4KB and 8KB pages. Ah, I miss programming the Motorola 68k series.

-ben
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
4K pages probably used to be too largeYuhong Bao2021/05/01 12:01 PM
  HDD seek time isn't freeMark Roulo2021/05/01 01:12 PM
    HDD seek time isn't freeYuhong Bao2021/05/01 01:21 PM
      HDD seek time isn't freeTim Mc2021/05/01 01:42 PM
        HDD seek time isn't freerwessel2021/05/01 01:57 PM
  4K pages probably used to be too largeBen LaHaise2021/05/02 09:45 AM
    VAX was 512 (in 1977) (NT)anonymous22021/05/02 07:36 PM
      FWIW, S/370 offered a choice of 2K and 4K (NT)rwessel2021/05/03 04:09 AM
      DEC's earliest PDP-11 disks were 512 (in 1971)John Yates2021/05/03 12:53 PM
    4K pages probably used to be too largeanon22021/05/03 12:17 AM
      4K pages probably used to be too largeBen LaHaise2021/05/03 04:36 PM
        Morotola 680x0 series page sizesBen LaHaise2021/05/03 04:51 PM
        4K pages probably used to be too largeanon22021/05/03 05:39 PM
          4K pages probably used to be too largeanon22021/05/03 07:51 PM
        4K pages probably used to be too largeYuhong Bao2021/05/03 09:51 PM
      4K pages probably used to be too largewumpus2021/05/05 08:06 AM
        4K pages probably used to be too largeanon22021/05/05 03:04 PM
          4K pages probably used to be too largeChester2021/05/05 05:45 PM
            4K pages probably used to be too largewumpus2021/05/06 08:06 AM
              Phenom TLB bugHeikki Kultala2021/05/06 11:46 AM
                Phenom TLB bugChester2021/05/06 04:29 PM
        4K pages probably used to be too largeEtienne Lorrain2021/05/06 12:08 AM
          4K pages probably used to be too largeJames2021/05/06 01:36 AM
            4K pages probably used to be too largerwessel2021/05/06 08:32 AM
              Reformatting SCSI disk sector sizeDoug S2021/05/06 10:30 AM
        4K pages probably used to be too largeDavid Hess2021/05/11 07:57 AM
  Page size is more complex/nuancedPaul A. Clayton2021/05/08 09:03 AM
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