Except in cases otherwise directed in this Constitution, the supreme court shall have appellate jurisdiction only, which shall be coextensive with the state, under such restrictions and regulations, not repugnant to this Constitution, as may from time to time be prescribed by law, except where jurisdiction over appeals is vested in some inferior court, and made final therein; provided, that the supreme court shall have power to issue writs of injunction, habeas corpus, quo warranto, and such other remedial and original writs as may be necessary to give it a general superintendence and control of inferior jurisdictions.