PDP-9 control memory

Description of the PDP-9 control memory contents.

Wiring matrix

Program listing

Decoded to binary and symbolic form

Address	Process word bits	Symbolic description
00	000000000000000000000000000000000000	CMA/00
01	000010000000000000000000101010001100	MBI ADSO SM CMA/25
02	000000000100000000000000110110001000	ARO SM CMA/33
03	000010000100000000000000101010011000	MBI ARO +1 SM CMA/25
04	000000000000000000000000000000000000	CMA/00
05	000010010010000010100000101110100010	MBI ACI ARI MQI LI KEY CONT CMA/27
06	000010000000010000000000100010001100	MBI PCI ADSO SM CMA/21
07	000010000100000000000000100100110000	MBI ARO +1 CONT CMA/22
10	000000000000100000000000100010001000	PCO SM CMA/21
11	000000001000000000000000110001001000	IRI EXT SM CMA/30
12	000000101010000000000000101000000000	ACO IRI ARI CMA/24
13	000000000010000000000000011100100000	ARI CONT CMA/16
14	000000000100000000000000111110001000	ARO SM CMA/37
15	000000000000000000000000000000000000	CMA/00
16	000000000000000000000000111100001000	SM CMA/36
17	000100000000000000000100010000000000	MBO DONE CMA/10
20	000000000000000000000100010000100000	DONE CONT CMA/10
21	000100000000010000000000010100110000	MBO PCI +1 CONT CMA/12
22	000100010010010010000000001110000100	MBO ACI ARI PCI MQI ADSO CMA/07
23	000100000001000000000001100000110000	MBO CJIT +1 CONT CMA/60
24	000000000000000000001000110000001000	TI SM CMA/30
25	000100000010000000000000101100000010	MBO ARI KEY CMA/26
26	000000000000100000000000100010001000	PCO SM CMA/21
27	000000000000000000000000000000000000	CMA/00
30	000000000001000001000001100000000000	CJIT DEI CMA/60
31	000000000000000001000000101000000000	DEI CMA/24
32	000000000010100000000000100110100000	ARI PCO CONT CMA/23
33	000000001000000000000000101000000000	IRI CMA/24
34	000100000010000000000000010000010001	MBO ARI +1 DCH CMA/10
35	000000000000000000000000000000000000	CMA/00
36	000000000000000000000000011110000001	DCH CMA/17
37	000000000000000000000000010110000001	DCH CMA/13
40	010000000000000000000100010000000000	EAE DONE CMA/10
41	010000100000000010000001011000100000	EAE ACO MQI CONT CMA/54
42	001000100000000010000001011010100000	EAE-R ACO MQI CONT CMA/55
43	010000010000000000000001000010100000	EAE ACI CONT CMA/41
44	000000000000000000000000000000000000	CMA/00
45	000000000000000000000000000000000000	CMA/00
46	000000000000000000000000000000000000	CMA/00
47	000000000000000000000000000000000000	CMA/00
50	000000000010001100000001000100100000	ARI EAE-P MQO CONT CMA/42
51	000010000000100000000001010100001000	MBI PCO SM CMA/52
52	000100000000010000100001010000010000	MBO PCI LI +1 CMA/50
53	001000000010000100000001011100100000	EAE-R ARI MQO CONT CMA/56
54	001000010000000000000001000000100000	EAE-R ACI CONT CMA/40
55	000000010100001000000001010110100000	ACI ARO EAE-P CONT CMA/53
56	000000100000001010000001011110100000	ACO EAE-P MQI CONT CMA/57
57	001000010100000000000001000000100000	EAE-R ACI ARO CONT CMA/40
60	000010000100000000000100010000100000	MBI ARO DONE CONT CMA/10
61	000010100000000000000100010000100000	MBI ACO DONE CONT CMA/10
62	000010000100000000000100010000100000	MBI ARO DONE CONT CMA/10
63	000010000000000000000100010000100000	MBI DONE CONT CMA/10
64	000100010000000000000100010000100000	MBO ACI DONE CONT CMA/10
65	100000010100000000000110010000100000	SUB ACI ARO DONE AXS CONT CMA/10
66	000100010100000000100110010000100000	MBO ACI ARO LI DONE AXS CONT CMA/10
67	000100010100000000100100010000100000	MBO ACI ARO LI DONE CONT CMA/10
70	000000000000000000001000110110001000	TI SM CMA/33
71	000101000010000000000100010000100000	MBO SKPI ARI DONE CONT CMA/10
72	000100010100000000010100010000100000	MBO ACI ARO AND DONE CONT CMA/10
73	100001100010000000000110010000100000	SUB SKPI ACO ARI DONE AXS CONT CMA/10
74	000100000000010000100100010000100000	MBO PCI LI DONE CONT CMA/10
75	010000100010000000100001000110100000	EAE ACO ARI LI CONT CMA/43
76	000000000000000000000000100000000000	CMA/20
77	000001010000000000100100010000100000	SKPI ACI LI DONE CONT CMA/10