[OpenBIOS] r638 - in trunk/openbios-devel/forth: bootstrap device
Nick.Couchman at seakr.com
Thu Dec 3 22:06:01 CET 2009
>>> On 2009/12/03 at 08:47, <svn at openbios.org> wrote:
> Author: mcayland
> Date: 2009-12-03 16:47:39 +0100 (Thu, 03 Dec 2009)
> New Revision: 638
> Fix backwards Fcode branches (bbranch and b?branch).
> According to the specification, the destination for a backwards Fcode branch
> must be resolved from the bottom rather than the
> top of the cstack. The existing version of the code was simply doing a swap,
> and so nesting any branches within a backward branch
> would fail since the wrong destination would be resolved from the stack.
> This patch adds a new cstack-startdepth variable to keep track of the cstack
> base location within an execution context
> (setup-tmp-comp and execute-tmp-comp) and alters the backward branches to make
> use of it.
> With this patch in place, Milax under Qemu doesn't crash anymore but sits in
> an infinite loop reading sectors from the CDROM.
The Solaris Nevada code still gets the unhandled exception in cfetch.
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