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From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.forth
Subject: Re: Stack Sizes
Date: Thu, 06 Oct 2016 23:14:51 -0700
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rickman <gnuarm@gmail.com> writes:
> A register/stack hybrid by giving a limited range of access into the
> stack for operands.

This sounds like a register window architecture, e.g. SPARC.  They were
in vogue in workstation processors for a while, but then went out of
favor, I think because of difficulties making them superscalar or
something like that.  For a small fpga softcore maybe that doesn't
matter.