Re: HP 9000-382 based instrument panics on cnopen()

On Sep 27, 2021, at 7:51 AM, Izumi Tsutsui <[email protected]> =
wrote:
>=20
>> I took a short video of the panic scroll: https://imgur.com/ik8GabY =
<https://imgur.com/ik8GabY>
>=20
> It might help to post full dmesg (even on video).
>=20
> Probably the framebuffer is recognized cnattach (early console =
detection)
> =
https://nxr.netbsd.org/xref/src/sys/arch/hp300/dev/topcat.c?r=3D1.4.64.1#5=
37
> but not during the device autoconfiguration.
> =
https://nxr.netbsd.org/xref/src/sys/arch/hp300/dev/topcat.c?r=3D1.4.64.1#1=
96

That sounds very plausible. It also sounds like what would cause the =
=E2=80=9Ccompressed=E2=80=9D and highlighted text output, since it=E2=80=99=
s very similar to what I saw with my 332 where it was assuming the video =
was 1024x400 rather than 512x400. I imagine I may need to instrument the =
topcat driver to figure out more about this EL display and its =
controller.

I enabled the code in hp300/stand/common/cons.c that prints the console =
select code, and it says it=E2=80=99s using =E2=80=9Cinternal grf=E2=80=9D=
 which means the console search failed and cons_scode is -1, which I =
think causes standalone to use the ROM to put and get characters.

>> 1. Is there a kernel boot switch or (build-time config option) that
>> I can use to point console to the serial port to see if I can get =
further?
>=20
> You need HIL keyboard to enable serial,
> https://wiki.netbsd.org/ports/hp300faq/#serial400
> or build kernel with "options CONSCODE=3D9" enabled.
> =
https://nxr.netbsd.org/xref/src/sys/arch/hp300/conf/GENERIC?a=3Dtrue&r=3D1=
.203#151

Excellent, thank you! This system has a built-in HIL keyboard and it is =
detected so hopefully I can do exactly this and maybe get this system =
brought up enough to use for capturing more information. (And backing up =
the internal HD...)

>> 2. Is there a way to have the hp300 port use the simple text =
interface
>> that most graphics cards provide for its console, if I can't (or I =
don't
>> want to) use a "graphical" console?
>=20
> AFAIK no hp300 framebuffer has "text" mode such as VGA.
>=20
> Trying NetBSD/5.x (i.e. pre-wscons'fied) might help to get explicit =
dmesg
> with built-in ROM fonts with old ite(4) and grf(4) console.

Great suggestion, thanks! If I can=E2=80=99t get serial working, I=E2=80=99=
ll try this so I can both get a dmesg and back up the preinstalled =
software.

  -- Chris