Re: Video "ringing" with PBXGA but not Mach64 or Elsa Gloria

From: Alan Frisbie (Usenet01REMOVE_at_Flying-Disk.com)
Date: 10/23/03

  • Next message: Megan: "Re: V5.01A Distribution of RT-11" 
    Date: Thu, 23 Oct 2003 07:49:51 -0700

    Hoff Hoffman wrote:

    > The cut-off for new graphic controller support is generally EV6
    > and later, though a few and very specific EV56 boxes might also
    > be supported. The key here is byte-word addressing within the
    > Alpha microprocessor and a non-swizzled I/O space bus interface.
    > (If your driver's call into IOC$NODE_FUNCTION returns a zero for
    > the swizzle shift count, you're good to go. If the call returns
    > non-zero, you can make calls to IOC$READ_IO and IOC$WRITE_IO --
    > which handle swizzled and non-swizzled references for you -- or
    > you are soon to learn about swizzling... Various of the graphics
    > device drivers have substantial knowledge of I/O space and of the
    > processor and can and do go directly at the I/O device.) Whoops,
    > that's probably _way_ more detail than you cared to know about...

    Perhaps at the moment, but I'll save if for future reference.

    Alan Remove "REMOVE" to reply

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