Re: port-i386/59829: The installer doesn't boot qemu with -cpu 486

["RVP via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR port-i386/59829; it has been noted by GNATS.

From: RVP <rvp%SDF.ORG@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-i386/59829: The installer doesn't boot qemu with -cpu 486
Date: Wed, 10 Dec 2025 10:59:38 +0000 (UTC)

 On Wed, 10 Dec 2025, nikola%radojevic.rs@localhost wrote:
 
 >> Description:
 > When trying to run the netbsd installer in a qemu vm, the kernel hangs before ever reaching userspace.
 > [...]
 > qemu-system-i386 -cpu 486 -m 512 -hda hdd.qcow2 -cdrom NetBSD-10.1-i386.iso
 >
 
 ```
 $ uname -a
 Linux CoreBook 6.14.0-27-generic #27~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 22 17:38:49 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
 $ qemu-system-i386 -version
 QEMU emulator version 8.2.2 (Debian 1:8.2.2+ds-0ubuntu1.10)
 Copyright (c) 2003-2023 Fabrice Bellard and the QEMU Project developers
 $
 ```
 
 This works if you drop into the bootloader prompt and boot using `boot -12'.
 (Ie. uni-processor mode; no ACPI.):
 
 ```
 qemu-system-i386 -cpu 486 -m 512 -hda ~/tmp/qemu/netbsd-10.qcow2 -cdrom /mnt/tmp/NetBSD-10.1_STABLE-i386.iso -boot d
 ```
 
 This works too w/o any of that fiddling:
 
 ```
 qemu-system-i386 -cpu pentium -smp 4 -m 512 -hda ~/tmp/qemu/netbsd-10.qcow2 -cdrom /mnt/tmp/NetBSD-10.1_STABLE-i386.iso -boot d
 ```
 
 -RVP