Wire 8 > pin 5 !READY > GND (Ready is not a signal present on IBM type floppies but needs to be grounded to work) Wire 4 > pin 12 !FDSELA > !Drive select B Then connect each of the following wires to each IDC pin as follows: Wire 22 > pin 28 !WPROTC > !Write protectĬlamp the IDC as normal then remove the top of the IDC header to reveal the unconnected IDC pins. The piece of ribbon with wires 12 to 26 should be inserted into the IDC header so that wire 12 makes contact with pin 18 and wire 26 makes contact with pin 32 leaving pins 33 & 34 at the end unconnected. ![]() Split the ribbon cable at the other end between wires 11 and 12. Mount the 26 way IDC on one end of the ribbon cable as normal with the red wire going to pin 1. You will need 34 way and 26 way IDC headers and a 26 way ribbon cable of suitable length ![]() Here are the construction details for the internal floppy adapter:
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