port-i386/54051: NetBSD 8.0 and NetBSD 8.99.35 can't handle isa graphic cards anymore

[falk.richter%yandex.com@localhost]

>Number:         54051
>Category:       port-i386
>Synopsis:       NetBSD 8.0 and NetBSD 8.99.35 can't handle isa graphic cards anymore
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 10 19:00:00 +0000 2019
>Originator:     Falk
>Release:        8.0 and current
>Organization:
private
>Environment:
NetBSD 8.0 (GNERIC) #0: Tue Jul 17 14:59:51 UTC 2018 mkrepro%mkrepro.NetBSD.org@localhost:/usr/sys/arch/i386/compile/GENERIC i386
>Description:
If I'm using any ISA graphic card (I tested different models from Trident, Cirrus Logic and OAK Technology) on a 586 or 486 board (here I tested also different types with different chipsets) the system boots until "kern.module.path=/stand/i386/8.0/modules". The next kernel messages are:
panic: cnopen: no console device
fatal breakpoint trap in supervisor mode
trap type 1 code 0 eip 0xc0118984 cs 0x8 eflags 0x246 cr2 0xb02c40f4 ilevel 0 esp 0xcdd5acc4
...
until to the kernel debugger.

If I use a pci or agp card on the same boards - it works.

Problem: the most 486 boards haven't pci slots (Vesa Local Bus I can't test because I don't have so a kind of card). With this bug 486 systems are not supported anymore...

Best regards,

Falk
>How-To-Repeat:
Using any isa graphic card instead of pci or agp
>Fix: