VGAR_I
VGAW_I(CRTC, 0x11, (((VGAR_I(CRTC, 0x11)) & 0xf0) | (vsync_e & 0x00f)));
(VGAR_I(CRTCEXT, 1) & 0xb8)
VGAW_I(CRTCEXT, 1, (VGAR_I(CRTCEXT, 1) & 0xef));
VGAW_I(CRTCEXT, 1, (VGAR_I(CRTCEXT, 1) | 0x10));
VGAW_I(CRTCEXT, 1, (VGAR_I(CRTCEXT, 1) & 0xdf));
VGAW_I(CRTCEXT, 1, (VGAR_I(CRTCEXT, 1) | 0x20));
VGAW_I(CRTCEXT,0,(VGAR_I(CRTCEXT,0)&0xCF)|((offset&0x300)>>4));
ext0 = VGAR_I(CRTCEXT,0)&0xB0;
VGAW_I(CRTCEXT,1,(VGAR_I(CRTCEXT,1)&0x77));
VGAW_I(CRTCEXT,1,(VGAR_I(CRTCEXT,1)|0x88));