Hardware pinouts information and cables schemes

Floppy Diskdrive specification users reports and reviews

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There are 46 approved reports in our database

Date Content
User opinion Comment Approved by moderator?
CORRECT34-pinout is ok, And what about Add here pinout for FDD 26-pin connector too..APPROVED
ERROR FIXEDin the first diagram, /DSKCHG should be marked as input, not as output. The signal will be delivered by the drive and received by the controller.APPROVED
ERROR FIXEDPin 5 is the keyed (missing) pin, not pin 3 as shown here.APPROVED
CORRECTDisregard previous comment about keying. Some floppy cables get pin 5 keyed, but the drives are keyed on pin 3. APPROVED
2009-07-15 03:21:16rev. 4CORRECTAPPROVED
2009-08-28 11:39:21rev. 4CORRECTAPPROVED
2012-01-05 17:53:19rev. 4CORRECTAPPROVED
2012-02-20 10:08:08rev. 4CORRECTAPPROVED
2012-04-20 21:39:42rev. 4CORRECTThe only one that I could spot was a "APPROVED
2012-07-12 00:31:28rev. 4CORRECTAPPROVED
2012-07-23 19:08:10rev. 4CORRECTAPPROVED
2012-08-17 02:02:16rev. 4CORRECTAPPROVED
2013-01-05 01:52:38rev. 4CORRECTAPPROVED
2013-01-19 03:13:21rev. 4CORRECTAPPROVED
2013-01-30 20:24:21rev. 4CORRECTAPPROVED
2013-02-25 03:14:26rev. 4CORRECTAPPROVED
2013-04-05 11:14:00rev. 4CORRECTAPPROVED
2013-11-02 15:25:12rev. 4INCORRECTIn description of Shugart interface signals DS3 and INUSE are swapped (see jumper IU setting of FD-55-GFR). Not shure, but pin34 Ready/DiskChange is the same on PC and Shugart and direction is from FDD to FDC.APPROVED
2013-12-01 17:00:43rev. 4CORRECTI want to make absolutely SURE, you know that I have worked on these machines, and have read the DOCUMENTATION. This article is ACCURATE. THANK YOU. APPROVED
2014-03-04 01:28:06rev. 5CORRECTAPPROVED
2014-07-29 06:42:20rev. 5ERROR FIXEDShugart interface pinout is incorrect: * Pin 4 should be /INUSE * Pin 6 should be /DS3 * Pin 34 direction should be from drive to controllerAPPROVED
2014-09-16 20:55:53rev. 5CORRECTAPPROVED
2014-11-23 20:47:47rev. 6INCORRECTHalf of pinout is missing, which pin on IBM interface is key pin?APPROVED
2015-05-24 11:24:19rev. 6ERROR FIXED"only the connector after the cable should be used" I think it was supposed to say "after the twist".APPROVED
2016-07-09 23:48:20rev. 7CORRECTAPPROVED
2016-07-18 06:55:44rev. 7CORRECTAPPROVED
2016-11-14 15:25:04rev. 7CORRECTAPPROVED
2016-12-18 19:08:56rev. 7CORRECTAPPROVED
2017-02-03 20:26:20rev. 7CORRECTAPPROVED
2017-02-05 12:49:17rev. 7CORRECTAPPROVED
2017-02-10 21:59:31rev. 7CORRECTAPPROVED
2018-09-05 17:29:27rev. 10CORRECTAPPROVED
2018-10-16 08:38:29rev. 10CORRECTNo errors. I have the original IBM PC Technical Reference book in my hands, and page 1-181 verifies your list. If you are a nitpicker for details, you might want to note that originally, on the 360KB floppy drives, pin 2 was unused. It became Density Select when the 1.2Megabyte drives were used in the PC/AT. Nice web site that you have there. APPROVED
2018-10-20 13:02:43rev. 10CORRECTAPPROVED
2019-03-13 18:19:40rev. 10CORRECTAPPROVED
2019-06-18 11:54:01rev. 10CORRECTAPPROVED
2019-06-23 21:53:55rev. 10CORRECTAPPROVED
2019-09-11 20:21:51rev. 10CORRECTAPPROVED
2019-09-20 17:12:03rev. 10CORRECTAPPROVED
2019-11-09 13:19:51rev. 10CORRECTAPPROVED
2019-12-02 21:11:38rev. 10ERROR FIXEDI think the direction arrow for /REDWC is pointing the wrong way. Surely the drive needs to tell the computer the density.APPROVED
2019-12-02 21:17:14rev. 10ERROR FIXEDLooks like the /DCD is pointing the wrong way on the Shugart interface as well.APPROVED
2020-08-04 09:23:14rev. 11CORRECTAPPROVED

History of users contributions

Date Content
Author Comment
2008-07-27 20:59:31rev. 3Sven Olaf Kamphuisadded key pin on mainboard info
2010-07-25 12:44:01rev. 4MalvineousClarified meaning of shared pin
2015-07-24 00:02:27rev. 7KikinouDetails on title
2018-04-06 21:29:01rev. 9Peter ByeFor Dummies and Ol 'arts - get info on Odd Num Pins right at TOP!

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Pinouts.ru > Pinout of Floppy Diskdrive and layout of 34 pin IDC male connector and 34 pin IDC female connector
should be correct