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From: "f4grx+bzsw at f4grx dot net" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug sim/25211] sim: m68hc11: fails to remap registers when writing
 INIT
Date: Wed, 09 Nov 2022 15:17:52 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25211

--- Comment #5 from Sebastien F4GRX <f4grx+bzsw at f4grx dot net> ---
Hello,

I really appreciate that you managed to produce a minimal test case to
reproduce the bug. I should have done that.

TBH it's quite hard for me to contribute here because there are so many rul=
es
in places that I feel overwhelmed and dont know how to start. There is also=
 a
LOT of legacy in these complex code bases and even if I could hack something
that worked, I have absolutely no idea how to fix this properly. Meanwhile,=
 I
have coded my own simulator where this function works.

Setting init to zero is quite important in the 68hc11, because in extended
mode, when you intend to use the hc11 as an almost generic microprocessor (=
not
just with a small embedded task), then the default value of INIT means that=
 the
IO range lies in the middle of any large external ram you install on the bu=
s.

I am very grateful that you have identified the issue. I dont know how to f=
ix
it but I DEFINITELY volunteer to test it.

Sebastien

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