----------------------------------SYSTEM BUS--------------------------
1	+5
2	IRQ2
3	A20/XCE (NO BUFFER)
4	A19 (NO BUFFER)
5	A18
6	A17
7	A16
8	A15
9	A14
10	A13
11	A12
12	A11
13	A10
14	+5
15	GND
16	A9
17	A8
18	A7
19	A6
20	A5
21	A4
22	A3
23	A2
24	A1
25	A0
26	+5
27	D0
28	D1
29	D2
30	+5
31	GND
32	D3
33	D4
34	D5
35	D6
36	D7
37	/OE SYS CARD RAM &BRAM IC519(6) INPUT FROM HUC6280(62) XRD /OE WORK RAM
38	/WE SYS RAM IC519(3) INPUT XWR HUC6280(63) /WE WORK RAM
39	GND
40	HU CARD CHECK
41	NC
42	NC
43	NC
44	MAIN BUS DATA ENABLE
45	MAIN BUS DATA R/W
------------------------------SYS CARD----------------------
46	SYS CARD ROM /CE
47	SYS CARD RAM0 /CE
48	GND
49	Q501 E
50	SYS CARD RAM1 /CE
51	NC
52	NC
53	NC
54	NC
55	NC
-------------------------------ADPCM------------------------
56	IC509, IC510 PIN17
57	IC509, IC510 PIN15
58	IC509, IC510 PIN3
59	IC509, IC510 PIN2
60	GND
61	+5
62	IC510 PIN1
63	IC510 PIN4
64	IC509 PIN1
65	IC509 PIN4
66	IC509, IC510 PIN10
67	IC509, IC510 PIN6
68	IC509, IC510 PIN7
69	IC509, IC510 PIN8
70	IC509, IC510 PIN11
71	IC509, IC510 PIN12
72	IC509, IC510 PIN13
73	IC509, IC510 PIN14
74	47K PULLUP
75	GND
76	IC509, IC510 PIN16
77	IC509, IC510 PIN5
78	Q307 B (RESET)
79	Q606 B (FADER)
80	Q607 B (FADER)
81	AUDIO MUX CONTROL
82	IC502 PIN14 (CLOCK?)
83	X1
84	X1
85	GND
86	IC502 PIN7
87	IC502 PIN6
88	IC502 PIN5
89	IC502 PIN4
90	+5
91	GND
92	IC502 PIN15
93	IC502 PIN16
-----------------------------CD ROM--------------------------
94	RST
95	GND
96	IC105 PIN46	[SCSI DATA
97	IC105 PIN45	[SCSI DATA
98	IC105 PIN44	[SCSI DATA
99	IC105 PIN43	[SCSI DATA
100	IC105 PIN42	[SCSI DATA
101	IC105 PIN41	[SCSI DATA
102	IC105 PIN39	[SCSI DATA
103	IC105 PIN38	[SCSI DATA
104	NC
105	-> IC103 PIN21
106	<- IC103 RESISTOR PIN22
107	IC105 PIN86	CD DATA (SERIAL)
108	IC105 PIN88
109	IC103 RESISTOR PIN69
110	IC103 PIN24 + IC104 PIN20
111	IC103 RESISTOR PIN77
112	GND
113	IC104 PIN19
114	IC105 RESISTOR PIN57
115	IC105 RESISTOR PIN33
116	IC105 RESISTOR PIN55
117	IC105 RESISTOR PIN35+54
118	IC105 RESISTOR PIN32
119	IC105 RESISTOR PIN56
120	GND