USB Universal Floppy Disk controller

16 Mar 2005

...
      I'm having difficulty finding a PS/2 to AT
keyboard adapter [1].    
 But that's just a connector change. Cut off the PS/2 mini-DIN plug and 
 solder on a normal DIN plug, or vice versa.  
   What?  And risk one of my precious IBM keyboards?!  They're getting harder 
What's the risk? FWIW, I did the PS/2 -> AT conversion on the IBM 
keyboard I am typing this on.

I seem to rememnber I couldn't find the PS/2 pinout at the time I was 
doing it. I did (of course) have the PC/AT one. I opened up the keyboard 
and buzzed out 2 of the wires to the power pins of a known chip. Those I 
soldered to the right pair of pins on the DIN plug. The other 2 wires, 
clock and data, are both open-collector driven bidirectional TTL signals. 
You can try those one way round on the clock/data pins of the DIN plug, 
when it doesn't work ('press F1 to contine' :-)), power down and try them 
the other way round.

...
    But I've gotten a few solid leads on some
adaptors (and yes, it's worth it
 to me to buy the adaptors---nothing more dangerous than a software guy with
 a soldering iron and all that. 
How about a hardware guy with a C compiler :-)

-tony

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USB Universal Floppy Disk controller