Typed by SEWER POSSUM for the SEWER DOC DISC series.

Instructions for the modification of an internal D/S drive (ST)

     These mods allow you to select either side 1 or 2 from a 
Double Sided format disc. It's possible to put 2 protected 
discs (say, TERRORPODS disc A & B) on a single D/S disc and 
change from side A to B at the flick of a switch. This mod 
literally halves the number of discs needed for protected titles.
     The modifications themselves are quite simple. You can 
either cut into the original 34 way cable or with a little more 
effort, make up a short extension cable and do the cutting on 
that!

     What you need then are a male and female 34 way IDC 
connector, a short length of 34 way ribbon cable (2 inches should 
be fine) and a single pole double throw switch. These should be 
available from places like Dick Smith's, although male IDC 
connectors are apparently difficult to come by. Some people have 
joined 2 female IDC's (using cut down resistor legs to join 
them).
     Make up the cable as illustrated on the diagram, with a male 
IDC on one end, a female IDC on the other. Cut and modify the 
extension cable as shown, connecting wire 32 to the switch and 
wire 33 to the switch earth. 
     The new extension cable will slot into the drive, the 
existing 34 wire cable slotting into the extension cable.
     Lastly, run the switch unit out behind your machine (there's 
plenty of little spaces to squeeze a couple of wires between) and 
mount it semi-permanently on the rear of your ST.
     When the switch is in the normal position, the drive works 
as per normal (that is S/S and D/S). Flick the switch and the 
drive will read and write to side B only!

                                                  Sewer Possum