How I hooked up 3.5" Floppies to my TI

Here is how I hooked up my 3.5 inch drives: works for me. your mileage may vary considerably and for petes sake dont fry anything or melt your cables

Get as many 3.5 to 5.25 adapter boards as you need.  I have four. 1 for each possible drive number. the adapter for drive number 2 requires no modifications, on the TI line 12 controls drive select for drive number 2, on non jumpered 3.5 drives this must be disabled for drives 1, 3, 4.

Example drive 1: simply cut the trace on the adapter board leading to pin 12. Drive 1 is controlled by line 10 on the TI controller since lines 10 and 12 are next to each other simply solder a small piece of wire (18 or 20 Ga.) between pins 10 and 12 on the adapter board on the 3.5" drive side of the cut trace. thats it repeat for each drive. And LABEL All MODIFIED Adapters. line 14 drive select 3 - line 6 drive select  4 (non TI controllers).

so lets recap:

drive 1 route pin or line 10 to pin 12 on the adapter
drive 2 no changes necessary on the adapter
drive 3 route pin or line 14 to pin 12 on the adapter
drive 1 route pin or line 6 to pin 12 on the adapter

remember all odd pins are ground

I am not an artist and my Drawing skills arent very good
The Lines are removed from part of the board for clarity

the above is for drive #1