*shipping is not included in listed price. DEC PDP-11 DR11-C GENERAL DEVICE INTERFACE MANUAL, 1974 ($15) ==================================================== ? ORIGINAL ISSUE ? UNUSED CONDITION ? 46 PAGES ? SECTIONS ARE (1) INTRODUCTION, (2) SOFTWARE INTERFACE, (3) USER INPUT/OUTPUT SIGNALS, (4) THEORY OF OPERATION, (5) MAINTENANCE, (6) EXAMPLES, AND (7) ENGINEERING DRAWING SET. ? APPENDICES ARE (A) INTEGRATED CIRCUIT AND (B) USE OF BB11.