Re: Anybody aware of the description of a 19pin connector of an Apple 5.25 Disk Drive ?

[Michael J. Mahon <mjmahon@aol.com>]

Patrick Schaefer <pa.schaefer@web.de> wrote:
> Am 06.05.2013 08:17 schrieb Peter Dassow:
> 
>> But this is almost unbelievable that nobody yet created a logic board
>> with an FPGA/whatever which converts the signals/creates the missing
>> signals. May be too much old drives are still available ...
> 
> You don't need a FPGA, the circuit is rather simple.
> 
> This is the schematic diagram of an Ehring FDC4
> http://www.harrowalsh.de/Elektronik/APPLEBOX/Images/FDC4Schaltplan.jpg
> and the conversion logic is the part on the right, between the 20pin and 34pin connector
> 
> 
> Regards
> Patrick

And it can't do quarter-tracking...  ;-)

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon