Using JDW's pictures of the SE/30 twinspark thing, these are my best guesses at pin assignments of that chip on the adapter:
1 - CPU A37 (+5V)
2 - CPU A7 (/STERM)
3 - PDS A10 (/BGACK) & Cache B29 (A20)
4 - NC
5 - NC
6 - NC
7 - NC
8 - NC
9 - NC
10 - NC
11 - NC
12 - CPU A10 (/BGACK)
13 - JP3
14 - NC
15 - NC
16 - Cache C38 (CPUCLK)
17 - PDS C38 (CPUCLK)
18 - Cache A2 (/PDS.MASTER)
19 - NC
20 - NC
There might be connections I can't see, or I might have gotten all the assignments backwards. I followed the numbering on the board, and I don't know if that's accurate. But, it seems to be doing something more complex than just mucking with slotid.
1 - CPU A37 (+5V)
2 - CPU A7 (/STERM)
3 - PDS A10 (/BGACK) & Cache B29 (A20)
4 - NC
5 - NC
6 - NC
7 - NC
8 - NC
9 - NC
10 - NC
11 - NC
12 - CPU A10 (/BGACK)
13 - JP3
14 - NC
15 - NC
16 - Cache C38 (CPUCLK)
17 - PDS C38 (CPUCLK)
18 - Cache A2 (/PDS.MASTER)
19 - NC
20 - NC
There might be connections I can't see, or I might have gotten all the assignments backwards. I followed the numbering on the board, and I don't know if that's accurate. But, it seems to be doing something more complex than just mucking with slotid.