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[Qemu-devel] Resource reporting for VGA cards
From: |
Hervé Poussineau |
Subject: |
[Qemu-devel] Resource reporting for VGA cards |
Date: |
Mon, 22 Oct 2012 21:43:47 +0200 |
User-agent: |
Thunderbird 2.0.0.23 (Windows/20090812) |
Hello,
I'm trying to add support for a S3 PCI VGA card to QEMU. It currently
works on some non-x86 systems.
However, on x86, it seems that the card is correctly detected, but there
is no display at all; I think it is due to bad framebuffer address
detection.
There is some resource differences beteween QEMU vs Microsoft Virtual PC.
Resources reported by MS Windows 98 are:
Microsoft Virtual PC:
Memory: 000A0000-000AFFFF
Memory: 000B0000-000BFFFF
I/O: 03B0-03BB
I/O: 03C0-03DF
Memory: F8000000-FBFFFFFF (I think it is the framebuffer)
QEMU:
Memory: 000A0000-000AFFFF
Memory: 000B0000-000BFFFF
I/O: 03B0-03BB
I/O: 03C0-03DF
Memory: FD000000-FDFFFFFF (BAR0)
Memory: 000C0000-000CFFFF (rom file?)
Memory: 04000000-04007FFF (???)
S3 card have a BAR0 of size 0x1000000 (16MB) for the framebuffer, and
ROM is created with bochs vgabios.
QEMU is launched with -m pc -device s3-trio.
Do you have an idea of what can be the last entry, and how to remove it
from resource detection?
And why MS Virtual PC doesn't report ROM file, while QEMU does?
Regards,
Hervé
- [Qemu-devel] Resource reporting for VGA cards,
Hervé Poussineau <=