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[MachineForth] Chuck's 25x and IBM's Blue Gene

In message <MDAEMON-F200107040630.AA300404md80000119766@xxxxxxxxxxxxxxxx
rg>, Dirk Heise <dheise@xxxxxxxxxxx> writes


>This leads me to a question. 

>So, if there would be some cheap board with a Misc or Stack
>based CPU, or some consumer product i can rip such a beast
>off, i'd expect a much better match to the language. Is
>there really no such CPU on the market? I can make my own
>board if necessary, so the chip would suffice. Does anyone 
>here have pointers? 

Hi Dirk,

Patriot Scientific make dual stack Forth engine (which they're trying to
push as a Java chip) which is based on a Chuck Moore design and has some
MISC-like features, albeit in a synchronous design.

It's 32bit 100MHz 3.3V 100pin for $25 one-off, loads four 8bit
instructions at a time from 32bit memory and many of the opcodes are
Forth primitives.  I've been using it for a while now, and it works well
- as far as I know there are no Silicon bugs.  It performs around 100
Forth MIPS, which isn't up to Jeff and Chuck's offerings, but it's
stable and inexpensive.

It's called the PSC1000A or Ignite1 - they make an evaluation board, but
I've designed three boards using it, and it's quite easy.  Forth Inc
sell an ANS Forth compiler for it; I use my own written using Win32Forth
which isn't ANS at all.

Patriot are at http://www.ptsc.com but you'd need to contact them for a
full technical manual (.pdf file) which they no longer have on their
'improved' WebSite, or I could email you the 1.5MB file if you wish.  

Keith Wootten

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