Parallel (Centronics) Port
--------------------------

   PIN     A1000       A500/A2000/A3000    Commodore PCs
   ---     -----       ----------------   -------------
   1       drdy*           strobe*         strobe*
   2       data 0          data 0          data 0 
   3       data 1          data 1          data 1 
   4       data 2          data 2          data 2 
   5       data 3          data 3          data 3 
   6       data 4          data 4          data 4 
   7       data 5          data 5          data 5 
   8       data 6          data 6          data 6 
   9       data 7          data 7          data 7 
   10      ack*            ack*            ack* 
   11      busy (data)     busy            busy 
   12      pout (clk)      pout            pout 
   13      sel             sel             sel 
   14      GND             +5v pullup      AUTOFDXT
   15      GND             NC              ERROR*
   16      GND             reset*          init*
   17      GND             GND             SLCT IN*
   18-22   GND             GND             GND
   23      + 5             GND             GND
   24      NC              GND             GND
   25      reset*          gnd             gnd