VGA_CRTC_MAX_SCAN
wreg_crt(cirrus, VGA_CRTC_MAX_SCAN, tmp);
outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg);
vga_wcrt(regbase, VGA_CRTC_MAX_SCAN, tmp);
svga_wcrt_mask(regbase, VGA_CRTC_MAX_SCAN, 0, 0x1F);
vga_wcrt(regbase, VGA_CRTC_MAX_SCAN, 0x0f); /* 0x4f */
par->crtc[VGA_CRTC_MAX_SCAN] = 0x40; /* 1 scanline, no linecmp */
par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80;
par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20;
write3X4(par, VGA_CRTC_MAX_SCAN, tmp);
par->crtc[VGA_CRTC_MAX_SCAN] = 0x40; /* 1 scanline, no linecmp */
par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80;
par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20; /* BLANK_START */
par->crtc[VGA_CRTC_MAX_SCAN] = (par->crtc[VGA_CRTC_MAX_SCAN]