VBE_DISPI_INDEX_X_OFFSET
bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, 0);
bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
vbox_write_ioport(VBE_DISPI_INDEX_X_OFFSET,
[VBE_DISPI_INDEX_X_OFFSET] = "x-offset",
mode->offset = ((u64)vbe[VBE_DISPI_INDEX_X_OFFSET] * mode->bytepp +