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