I noticed that the video in QEMU stopped working. When I start qemu-system-ppc all I see is a black window. Not even OpenBIOS displays anything. After some bisecting I found out it was this patch that causes the problem:
Commit 29f9cef39eb1ae55e82c6763eb22d7a1bdff7276 Author: Sebastian Bauer <m...@sebastianbauer.info> Date: Mon Jul 2 21:13:45 2018 +0200 ppc: Include vga cirrus card into the compiling process Drivers for this card exists on PPC-based AmigaOS guests so it is useful to allow users to emulate the graphics card for PPC machines. As cirrus vga is currently preferred over std(vga) in absence of any user choice, this change also sets the default display of spapr machines to std as otherwise qemu refuses to start these machines. Not specifying an explicit graphics mode is for instance done by 'make check'. Signed-off-by: Sebastian Bauer <m...@sebastianbauer.info> Signed-off-by: David Gibson <da...@gibson.dropbear.id.au> I think a solution to this problem might be to have the mac99 machine use "-vga std" as default. When I use -vga std, video works again.