2011/6/16 Andreas Färber <andreas.faer...@web.de>: > Am 15.06.2011 um 06:33 schrieb Roy Tam: > >> 2011/6/14 Andreas Färber <andreas.faer...@web.de>: >>> >>> The IBM E15 is equivalent to an S3 Vision864. >>> >>> Lacking S3 SDAC (86C716) support, the DAC indizes are translated >>> to greyscale colors. This works sufficiently to observe firmware >>> boot progress. >>> >> >> IMO we can generalize it as a generic S3 Vision864 and use it in x86 guest >> too. > > What in particular would we need to generalize? It's qdev'ified; I don't > remember seeing anything PReP-specific in there. > It still needs VMState of course. > >> http://wiki.qemu.org/Google_Summer_of_Code_2011#Add_a_S3_Trio_or_S3_Virge >> CC: Natalia Portillo <clau...@claunia.com> >> >>> Cc: Hervé Poussineau <hpous...@reactos.org> >>> >>> Fixed off-by-one drawing issue. >>> Replaced hardcoded color for RECT. >>> Separate I/O debug output for readability. >>> >>> Signed-off-by: Andreas Färber <andreas.faer...@web.de> >>> --- >>> Makefile.objs | 1 + >>> default-configs/ppc-softmmu.mak | 1 + >>> hw/pci_ids.h | 3 + >>> hw/ppc_prep.c | 2 + >>> hw/vga-s3.c | 694 >>> +++++++++++++++++++++++++++++++++++++++ >>> 5 files changed, 701 insertions(+), 0 deletions(-) >>> create mode 100644 hw/vga-s3.c >>> >> [snip] >> >> IMO using vga-s3-864.c as the file name may be better as S3 produced >> many display chips. > > Actually in the meantime I've already renamed the file to vga-ibm8514a.c > (better: vga-ibm8514.c) and renamed the registration functions to reflect > the s3_vision864. >
Actually what I mean is that, you may make the code to be more S3 Vision864-ish because S3 Vision864 extends its display capability, not only 1024*768 4/8bpp. > I agree that rather than bundling different graphics cards by one vendor we > should bundle different implementations of the same chipset. I was assuming > that the IBM E15 uses a different vendor_id at least but could share the > initialization with other cards, once mst's declarative PCI initialization > reaches master (prepared that locally). > Supposedly the Miro 20SD is compatible with the S3 Vision864, and the ATI > Mach8 was based on IBM 8514/A, too. Not sure about the Weitek P9100-based > IBM S15. > > Any suggestions what to do about the RAMDAC would be appreciated. The > firmware only accesses the DAC_MASK register but does not write to the DAC > itself, so for colors the card needs a reset handler that initializes the > 256-color palette to the right RGB values. > > Andreas
