128K Core RAM Industrial PDP 11/40 System KD11-A CPU / main cabinet (top) 1: empty 2: M7238 KE11E 3: M7232 (1-4) U Word; M7237 (5) KJ11; M787 (6) KW11-L 4: M7231 DATA PATH 5: M7233 IR DECODE 6: M7235 STATUS 7: M7234 TIMING 8: M7236 KT11D 9/11: M981 (1-2) (10 n/a gap) 11: M8294 (3-6) 12: M7959 (1-2) 13-15: G236 H224C G116 32K Core RAM 16-18: G236 H224C G116 32K Core RAM 19/21: M920 (1-2) (20 n/a gap) 19: M8294 (3-6) 21: M920 22: M7259 23-25: G236 H224C G116 32K Core RAM 26-28: G236 H224C G116 32K Core RAM 29/31: M920 (1-2) (30 N/A GAP) 31: M7911 (3-6) TMB11 tape control 1 (TE16 tape?) 32: M7912 TMB11 tape control 2 (TE16 tape?) 33: M7821 (2) (interrupt control) M796 (3) Unibus master control, used with M782 M105 (4) (you need this for the card reader) M930 (5-6) BUS TERMINATOR 34: M795 (3-6) Word count and bus address module ------------ EXPANSION CHASSIS (ON BOTTOM) 1: GC (4) 2: GC (4) 3: -- 4: -- 5: GC (4) 6: GC (4) 7: M8291 (DR11/DM11 card reader) 8: GC (4) 9/11: M920 (1-2) (10 N/A GAP) 11: M7297 (3-4), M7296 (5-6) 12: M7295 MASSBUS bus contr (RH11-A) 13: M7294 MASSBUS data buffer and control (RH11) 14: M5904 (3-4) MASSBUS control transceiver RH11 15: M5904 (3-4) 16: M5904 (3-4) 17: GC (4) 18: GC (4) 19: GC (4) Note - also included, cables.