Apollo 1 to 3 serial connector: Sio 1 Sio 2 Sio 3 1 – 1 1 – 1 1 – 1 7 – 7 7 – 7 7 – 7 2 – 2 2 – 12 2 – 21 3 – 3 3 – 13 3 – 9 4 – 4 4 – 14 4 – 23 5 – 5 5 – 15 5 – 10 8 – 8 8 – 16 8 – 25 20 – 20 20 – 18 20 – 19 The left columns are the connections to the divided stream. The right columns indicate the connection made in the joined connector which goes in the Apollo’s back. ( 2/15/94, Willem Jan Withagen ) [5.12] Can I add serial ports to DN[345]x00 nodes? How about an internal modem? Why does my Apollo look like it has an IBM AT bus? Can I use PC ISA cards in my Apollo? You can add serial ports with an SPE (Serial and Parallel Expansion) card and the SPE software. The SPE card is actually just your standard IBM-PC serial/parallel I/O card; chances are, you can salvage one from an old PC and use it in the Apollo. You do, however, still need the SPE software (actually just a bunch of drivers and device files) to use the card. At least version 2.2 of SPE is REQUIRED f
