External 5-1/4" drive for Tandy 1000EX

They are not quite generic drives, but if you put a 5.25" DS/DD type drive in an external enclosure and used a cable you can make it work. Note that the connector on the EX is 30 PIN. The 34 PIN port is the parallel interface. Coming from the EX you will have to disconnect the following pins: 2, 4, 6, 8 (+5v) and 1, 3, 28, 30 (+12v) You can wire this to actually power the drive. Get an old 4 pin Molex connector from an old power supply. Connect 2,4,6,8 up to red Connect 1,3,28,30 to yellow Connect 5,7,9 to the blacks 5,7,9,11,13,18,22,24,26 on the EX are all ground and should go to 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23,25, 27, 29, 31, 33 Now, here should be the rest: Then you have to do a little "cross over" somehow. I've done it with perf board and by twisting, soldering and insulating the connections. EX External drive 10 8 Index* 29 10,12,14 or 6 Drive Select (depends on which you want 0, 1, 2 or 3)* Internal is hardwired to ds0 (10) 16 16 Motor On* 17 18 Direction* 14 20 Step* 23 22 Write Data* 25 24 Write Enable* 12 26 Track 0* 19 28 Write Protect* 21 30 Read Data* 15 32 Side Select* For more information, see: http://support.radioshack.com/support_computer/doc1/1064.htm The Tandy external drives were powered over the floppy cable for the ex/hx and several others. Kelly