VGA_GFX_BIT_MASK
vga_wgfx(cinfo->regbase, VGA_GFX_BIT_MASK, 0xff);
vga_wgfx(regbase, VGA_GFX_BIT_MASK, 0xFF);
par->gdc[VGA_GFX_BIT_MASK] = 0xFF;
return vga_io_rgfx(VGA_GFX_BIT_MASK);
gdc[VGA_GFX_BIT_MASK] = 0xFF;
gr8 = vga_rgfx(state->vgabase, VGA_GFX_BIT_MASK);
vga_wgfx(state->vgabase, VGA_GFX_BIT_MASK, 0xff);
vga_wgfx(state->vgabase, VGA_GFX_BIT_MASK, gr8);