The bochs vbe interface got a new register a while back, which specifies the linear framebuffer size in 64k units. This patch adds support for the new register to qemu. With this patch applied vgabios 0.6c works with qemu.
Signed-off-by: Gerd Hoffmann <kra...@redhat.com> --- hw/vga.c | 3 ++- hw/vga_int.h | 4 +++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/hw/vga.c b/hw/vga.c index 6a1a059..a5c6997 100644 --- a/hw/vga.c +++ b/hw/vga.c @@ -1955,7 +1955,8 @@ void vga_common_reset(VGACommonState *s) #ifdef CONFIG_BOCHS_VBE s->vbe_index = 0; memset(s->vbe_regs, '\0', sizeof(s->vbe_regs)); - s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID0; + s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5; + s->vbe_regs[VBE_DISPI_INDEX_VIDEO_MEMORY_64K] = s->vram_size / (64 * 1024); s->vbe_start_addr = 0; s->vbe_line_offset = 0; s->vbe_bank_mask = (s->vram_size >> 16) - 1; diff --git a/hw/vga_int.h b/hw/vga_int.h index 23a42ef..4b8fc74 100644 --- a/hw/vga_int.h +++ b/hw/vga_int.h @@ -47,13 +47,15 @@ #define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7 #define VBE_DISPI_INDEX_X_OFFSET 0x8 #define VBE_DISPI_INDEX_Y_OFFSET 0x9 -#define VBE_DISPI_INDEX_NB 0xa +#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa +#define VBE_DISPI_INDEX_NB 0xb #define VBE_DISPI_ID0 0xB0C0 #define VBE_DISPI_ID1 0xB0C1 #define VBE_DISPI_ID2 0xB0C2 #define VBE_DISPI_ID3 0xB0C3 #define VBE_DISPI_ID4 0xB0C4 +#define VBE_DISPI_ID5 0xB0C5 #define VBE_DISPI_DISABLED 0x00 #define VBE_DISPI_ENABLED 0x01 -- 1.6.6.1