diff options
| -rw-r--r-- | hw/display/vga.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/hw/display/vga.c b/hw/display/vga.c index 3433102..ad7a465 100644 --- a/hw/display/vga.c +++ b/hw/display/vga.c @@ -1628,9 +1628,15 @@ static void vga_draw_graphic(VGACommonState *s, int full_update) y1 = 0; if (!full_update) { + ram_addr_t region_start = addr1; + ram_addr_t region_end = addr1 + line_offset * height; vga_sync_dirty_bitmap(s); - snap = memory_region_snapshot_and_clear_dirty(&s->vram, addr1, - line_offset * height, + if (s->line_compare < height) { + /* split screen mode */ + region_start = 0; + } + snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start, + region_end - region_start, DIRTY_MEMORY_VGA); } |