VGA_GFX_PLANE_READ
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x02);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x00);
vga_wgfx(cinfo->regbase, VGA_GFX_PLANE_READ, 0x00);
vga_wgfx(regbase, VGA_GFX_PLANE_READ, 0x00);
par->gdc[VGA_GFX_PLANE_READ] = 0;
gdc[VGA_GFX_PLANE_READ] = 0;
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x0);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x1);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, gr4);
gr4 = vga_rgfx(state->vgabase, VGA_GFX_PLANE_READ);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x2);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x3);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x0);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x1);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, gr4);
gr4 = vga_rgfx(state->vgabase, VGA_GFX_PLANE_READ);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x2);
vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x3);