X-Ray cable:                                                             
                                                                        
        LPT                                 |       C64                |   DRIVE 1541
--------------------------------------------+--------------------------+-----------------------
Pin   Name       Dir                        | Pin      Name      Dir   | Pin      Name      Dir
--------------------------------------------+--------------------------+-----------------------
1     /STROBE    ->        *-----------     |                          | 
2     D0         <>                   |     | U.C      PB0       <>    | U.C      PB0       <> 
3     D1         <>                   |     | U.D      PB1       <>    | U.D      PB1       <> 
4     D2         <>                  _|_    | U.E      PB2       <>    | U.E      PB2       <> 
5     D3         <>                  /_\    | U.F      PB3       <>    | U.F      PB3       <> 
6     D4         <>                   |     | U.H      PB4       <>    | U.H      PB4       <> 
7     D5         <>                   |     | U.J      PB5       <>    | U.J      PB5       <> 
8     D6         <>                   |     | U.K      PB6       <>    | U.K      PB6       <> 
9     D7         <>                   |     | U.L      PB7       <>    | U.L      PB7       <> 
10    ACK        <-        -------    |     | S.5      DATA      <>    |                       
11    BUSY       <-   ------|    |    |     | S.6      RESET     <>    | 
12    PAPER END  <-   ---   |    |    |     | S.4      CLK       <>    | 
13    SELECT IN  <-     | --|----|----|     | S.2      ATN       <>    | 
14    /AUTOFD    ->   *--   |    |          |                          | 
15    /ERROR     <-         |    |          |                          | 
16    /INIT      -> *-------|-----          |                          | 
17    /SELECT    -> *-------|               |                          | 
18    GND                                   |                          |                       
19    GND                                   | S.2      GND             | S.2      GND
20    GND                                   |                          |
21    GND                                   |                          |
22    GND                                   |                          |
23    GND                                   |                          |
24    GND                                   |                          |
25    GND                                   |                          |


Programming:                                                                                    
                                                                                    
LPT                                            
-------------------------------------------------------------------------------
Pin   Name       Dir  Description        Port        bit      
-----------------------------------------------------------
1     /STROBE    ->   Strobe             $037a       0  $01
2     D0         <>   Data Bit 0         $0378       0  $01
3     D1         <>   Data Bit 1         $0378       1  $02
4     D2         <>   Data Bit 2         $0378       2  $04
5     D3         <>   Data Bit 3         $0378       3  $08
6     D4         <>   Data Bit 4         $0378       4  $10
7     D5         <>   Data Bit 5         $0378       5  $20
8     D6         <>   Data Bit 6         $0378       6  $40
9     D7         <>   Data Bit 7         $0378       7  $80
10    /ACK       <-   Acknowledge        $0379       6  $40
11    BUSY       <-   Busy               $0379       7  $80
12    PE         <-   Paper End          $0379       5  $20 - interupt call
13    SEL        ->   Select             $0379       4  $10
14    /AUTOFD    ->   Autofeed           $037a       1  $02
15    /ERROR     <-   Error              $0379       3  $08
16    /INIT      ->   Initialize         $037a       2  $04
17    /SELIN     <-   Select In          $037a       3  08

$0379:

    $04 - int request (non processed)

$0379

    $20 - 1->INPUT 0->OUTPUT for D0-D7
    $10 - 1->enble generating IRQ


C64                
-------------------------------------------------------------------------------
Pin      Name      Dir     Address     Bit      Direction
---------------------------------------------------------
U.C      PB0       <>      $dd01       0  $01
U.D      PB1       <>      $dd01       1  $02
U.E      PB2       <>      $dd01       2  $04
U.F      PB3       <>      $dd01       3  $08
U.H      PB4       <>      $dd01       4  $10
U.J      PB5       <>      $dd01       5  $20
U.K      PB6       <>      $dd01       6  $40
U.L      PB7       <>      $dd01       7  $80
S.5      DATA      <>      $dd00       7  $80   IN
                           $dd00       5  $20   OUT
S.4      CLK       <>      $dd00       6  $40   IN
                           $dd00       4  $10   OUT
S.3      ATN       <>      $dd00       3  $08   OUT


DRIVE 1541      
-------------------------------------------------------------------------------
                  
Pin      Name      Dir     Address     Bit      Direction
---------------------------------------------------------
U.C      PB0       <>      $1801       0  $01
U.D      PB1       <>      $1801       1  $02
U.E      PB2       <>      $1801       2  $04
U.F      PB3       <>      $1801       3  $08
U.H      PB4       <>      $1801       4  $10
U.J      PB5       <>      $1801       5  $20
U.K      PB6       <>      $1801       6  $40
U.L      PB7       <>      $1801       7  $80
S.5      DATA      <>      $1800       0  $01   IN
                           $1800       1  $02   OUT
S.4      CLK       <>      $1800       2  $04   IN
                           $1800       3  $08   OUT
S.3      ATN       <>      $1800       7  $80   IN