Happy Birthday VAX 11/780 (influence of)

[Chuck Guzis]

On 28 Oct 2010 at 14:36, Richard wrote:


> You asked if it was used on modern PCs.  The answer is yes.  Every PC
> these days supports standard VGA/monochrome display adapter
> functionality which uses a memory-mapped framebuffer.  Even the
> high-end 3D cards support this functionality, albeit as a legacy from
> past architectures.

I probably should have said "modern PCs exclusively use memory-mapped 
I/O" a la PDP-11 or CP-1600 or MC6800...

Clearly there, the answer is "no".  They have I/O address space and 
use it.

Not that I think that memory-mapped I/O is a bad idea.  Most 
microcontrollers are witness to that.

--Chuck