Hello,

This is a tested and working circuit. (Tested on Amiga 500 and Amiga 600 with FlashFloppy* firmware installed GOTEK floppy disk drive emulator (SFR1M44-U100 and SFR1M44-U100K).)

This adapter helps you to connnect; FlashFloppy* firmware installed GOTEK floppy disk drive emulator (SFR1M44-U100 or SFR1M44-U100K) to your Amiga 500, externally as DF:1 (from Amiga 23 pin disk drive connection).

*For information about, FlashFloppy firmware installing to Gotek drive, you can look at the links below.

https://github.com/keirf/FlashFloppy/wiki/Firmware-Programming

https://github.com/keirf/FlashFloppy/wiki/Firmware-Programming#method-2-usb-programming

https://www.youtube.com/watch?v=yUOyZB9cro4

Optional Hardware mods:

https://github.com/keirf/FlashFloppy/wiki/Hardware-Mods

Thanks to Keir Fraser for FlashFloppy project.  https://github.com/keirf/FlashFloppy

Components:

34pin DC3 2.54mm Pitch Jtag Isp Male Socket Straight IDC connector (2x17 Male Box Header)

4 pin male header

34pin (2x17) pin FDD female-female cable

4 pin dupont female-female cable (For power connector)

DB23M 23 pin D-sub male connector**

FlashFloppy* firmware installed GOTEK (SFR1M44-U100 or SFR1M44-U100K)

Instead of male headers + female-female dupont cables, you can use male-female dupont cables and solder directly to PCB.

Do not forget to setup the jumper position on the GOTEK. (Only S1 cap must be installed)

** There are several methods to obtain 23 pin D-sub male connector:

25 pin D-sub male connector's pins and the 3D model link below.

https://www.thingiverse.com/thing:1238286

Or you may chose this method.

https://archive.org/download/db23m/DB23M.jpg

You can find the first (non IDC) version from here.

You can find the cableless DOCK version of Amiga external GOTEK connection from here.

You can find the single cable (2 PCB) version of Amiga external GOTEK connection from here.

PS: With Kickstart ROM V1.2 and V1.3 you may need AMIGA 500 - SWITCHLESS BOOT SELECTOR to boot from external drive.

Ps. While transfering data (reading or writing) from SD cards or USB flash storages it should not be interrupted like power-off or Reset systems. Otherwise that may damage memory chips.

In order to protect your electronical devices, always turn off your Amiga before connecting or disconnecting any device.

Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!

Have fun

Thank you.