BBU Pin,Signal Name,Description,Device Connection,Device Pin
1,GND,,,
2,RD7,,,
3,RD8,,,
4,RD9,,,
5,RD10,,,
6,RD11,,,
7,RD12,,,
8,RD13,,,
9,RD14,,,
10,RD15,,,
11,EXTPDS,,,
12,EN245,Select Data Buffer,74LS245,
13,VCC,,,
14,/WR,,,
15,/CAS-SIMM3,,SIMM3,2
16,/CAS-SIMM1,,SIMM1,2
17,/EOP,,53C80,
18,/CAS-SIMM4,,SIMM4,2
19,/CAS-SIMM2,,SIMM2,2
20,/RAS,,,
21,GND,,,
22,VCC,,,
23,A23,,,
24,A22,,,
25,A21,,,
26,A20,,,
27,A19,,,
28,A17,,,
29,A9,,,
30,/IPL1,,68000,
31,/IPL0,,68000,
32,IRQ,,65C22/6523,
33,/LDS,,68000,
34,/BERR,,68000,
35,/UDS,,,
36,/VPA,,68000,
37,CK,,68000,
38,/DTACK,,68000,
39,SELROM,Select ROM,ROM,"20 on ROM HI, LO"
40,"RTxCB, PCLK, ADB CLK",All the things,"85C30, ADB, GLU","20 & 28 on 85C30, 16 on ADB, 9 on GLU"
41,/AS,,,
42,VCC,,,
43,GND,,,
44,FCLK,,"SWIM, GLU","24 on SWIM, 19 on GLU"
45,SELSCC,Select SCC,85C30,32 on /CE
46,/RD,,85C30,
47,R/W,,,
48,SELSWIM,Select SWIM,SWIM,7 on /DEV
49,EXTFLP,PWM,External Floppy,10 on PWM
50,PB7,,65C22/6523,
51,SELSND,Select Sound,SND,
52,EXTPDS,,,
53,PA6,,65C22/6523,
54,/LDS,,,
55,DRQ,,53C80,22 on DRQ
56,/DACK,,53C80,26 on /DACK
57,SELSCSI,Select SCSI,53C80,21 on /CS
58,SELVIA,Select VIA,65C22/6523,24 on RS0
59,/RST,,,
60,HSYNC,Horizontal Sync,J12,Pin 10 on J12
61,VSYNC,Veritcal Sync,"J12, 65C22/6523","Pin 11 on J12, 40 on DB7"
62,VIDOUT,Composite Video Out,"J12, 65C22/6523","Pin 9 on J12, 28 on PC3"
63,GND,,,
64,VCC,,,
65,RA9,,,
66,RA7,,,
67,RA8,,,
68,RA6,,,
69,RD0,,,
70,RA5,,,
71,RA4,,,
72,RD1,,,
73,RA3,,,
74,RD2,,,
75,RD3,,,
76,RA2,,,
77,RD4,,,
78,RA1,,,
79,RA0,,,
80,RD5,,,
81,/PMCYC,,74F257,/OE
82,EN257,Select Address Buffer,74F257,
83,RD6,,,
84,VCC,,,