On 2009-07-30, Dave Angel <da...@ieee.org> wrote:
> As far as I know, nobody has yet built a microcode implementation of a
> Python VM (Virtual Machine). Nor have I seen one for the Java VM.
Didn't Sun or somebody do one 10-12 years ago? Or did I
misinterpret some press release or something? Off to google...
> However, in the early 80's there was a microcode implementation of the
> P-system VM.
Ah yes. I remember sitting at an Intel MDS-80 "blue box" CP/M
system entering assembly language by hand for a simple Pascal
-> P-code compiler. IIRC, I typed it from a listing in the
"Byte Big Book of Pascal". That machine was pretty high-tech,
since I could save my work on an 8" floppy rather than a spool
of paper tape. The floppy disks didn't leave big oil stains in
your backpack!
I got the compiler working, but I don't remember ever having a
VM and run-time system.
> It was never a commercial success, but it existed. And there
> have been at least three Forth machines, where the hardware
> itself was designed to support the language's VM. No
> microcode at all.
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