GREG_MISC_OUTPUT_R
hvsync_pulse = vgar(ba, GREG_MISC_OUTPUT_R);
hvsync_pulse = vgar(ba, GREG_MISC_OUTPUT_R);
hvsync_pulse = vgar(ba, GREG_MISC_OUTPUT_R);
et_regs->misc_output = vgar(ba, GREG_MISC_OUTPUT_R);
*vgabase = (bus_space_read_1(*iot, *ioh, GREG_MISC_OUTPUT_R) & 0x01)