diff --git a/hw/vga.c b/hw/vga.c index e3d244642e..eeb77f1ff3 100644 --- a/hw/vga.c +++ b/hw/vga.c @@ -1619,6 +1619,16 @@ static void vga_draw_graphic(VGAState *s, int full_update) s->double_scan = double_scan; } + if (shift_control == 0) { + if (s->sr[0x01] & 8) { + disp_width <<= 1; + } + } else if (shift_control == 1) { + if (s->sr[0x01] & 8) { + disp_width <<= 1; + } + } + depth = s->get_bpp(s); if (s->line_offset != s->last_line_offset || disp_width != s->last_width || @@ -1660,7 +1670,6 @@ static void vga_draw_graphic(VGAState *s, int full_update) full_update |= update_palette16(s); if (s->sr[0x01] & 8) { v = VGA_DRAW_LINE4D2; - disp_width <<= 1; } else { v = VGA_DRAW_LINE4; } @@ -1669,7 +1678,6 @@ static void vga_draw_graphic(VGAState *s, int full_update) full_update |= update_palette16(s); if (s->sr[0x01] & 8) { v = VGA_DRAW_LINE2D2; - disp_width <<= 1; } else { v = VGA_DRAW_LINE2; }