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--- x68000:adding_an_fdx68_to_x68000 [2018/11/29 09:21] – leonk
+++ x68000:adding_an_fdx68_to_x68000 [2018/11/30 14:00] – leonk
@@ Line 210: / Line 210: @@
 ====== X68000 PRO and similar systems ======
-... coming soon ...
+===== Connection Method =====
+The external floppy disk drive connecter is labelled "EXTERNAL FDD" on the back of the X68000. This is a pretty common connector known as the "D-SUB 37 pin female connector". In order to connect an external device to this port a D-SUB 37 pin male connector is necessary. One should be able to purchase a D-SUB 37 pin male connector at many online retail stores. You will also need to purchase the matching enclosure shell for the connector. Lastly, you will require a way to connect this to the FDX68.  A standard floppy disk drive cable (ribbon or round) will work well.
+{{:x68000:fdx68_dsub37.png?nolink&200|}}
+{{:x68000:fdx68_floppy_cable.jpg?nolink&200|}}
+{{:x68000:fdx68_floppy_cable_2.jpg?nolink&300|}}
+When making your own cable to convert from D-SUB 37 to the 34-pin connector found on the FDX68, the following conversion table should be referenced. The pin assignment for creating the conversion cable is as follows. After soldering the pins, one should confirm they cable is soldered correctly using a voltmeter.
+... to do ...
+===== Internal FDD are drives 0,1 and FDX68 are drives 2,3 =====
+It is not possible to change the ID of the built-in floppy disk drives with a switch on the rear. Therefore the internal FDD are always assigned the first and second boot drives (drive A: and B:) and the FDX68 emulated floppy disk drives as the third and fourth drives (drive C: and D:)  you must set the FDX68 jumpers to location 2,3 for both DRV and OPT as shown below.
+The X68000 can still boot a system from the FDX68 as long as no bootable floppies are found in the internal FDDs. It is also important to note that although games will boot from drives 2,3 many multi-disk games will only search for additional floppy disks in drives 0,1.  This configuration is useful for booting HumanOS (to install SASI boot loader into SRAM, or change SRAM configuration), or single disk games.
+{{:x68000:FDX68_xvi_1.png?nolink&100|}}
+===== Internal FDD are drives 2,3 and FDX68 are drives 0,1 =====
+To use the FDX68 emulated floppy disk drives as the first and second drives (drive A: and B:) and the internal FDD as the third and fourth disk drives (drive C: and D:) do the following. Set the FDX68 jumpers to location 0,1 for both DRV and OPT as following:
+{{:x68000:FDX68_xvi_3.png?nolink&100|}}
+Next, you will need to change the jumpers on the built-in floppy disk drives. As soon as you remove the cover of the system, you will see the FDD but the jumper is on the back of the internal floppy disk drive, hidden by the cable and it is hard to see and change it. You will need to remove the floppy disk drive. The jumper is not divided by DRIVE and OPTION like on the FDX68. It will be a green jumper as seen below, change this jumper to position 2 or 3 depending on the drive you are working on (both drives can not be set to the same number)
+{{:x68000:fdx68_pro_1.png?nolink&200|}}
+{{:x68000:fdx68_pro_2.png?nolink&300|}}
+This configuration will allow you to use multi-disk games using the FDX68 FDD emulator with no drive number issues. But the FDX68 must be running at startup.  If drives 0,1 do not respond on boot-up (even with no disks) the X68000 will not boot (even when trying to boot to a hard drive).
+===== Starting the Floppy Disk Drive emulator =====
+Using the FDX68 software to emulate the floppy disk drive, mount/unmount images, convert images, etc. is the same on all systems.  Please refer above for instructions on how to use the software.