TMK converters translate various old protocols into USB and you can use features TMK firmware offers. I can make keyboard converter for you,
To place an order Email me to let me know which converter(protocol) you want and your email address. My email is :
More
hasu@tmk-kbd.com
Feel free to post any questions and suggestions in this thread or PM/email me if needed.Updates2015/05/26 Ordered MAX3421e chips for USB-USB
2015/07/13 Updated M0110 keymap editor(for Rev.1)
2015/07/15 [USB to USB] Added locking key indicator support and fix for rollover error
2015/11/02 [USB to USB] restocked
2016/01/13 Added keymapeditor for USB to USB Converter
2016/03/18 [IBM4704] Converter for internal connection is available
2016/04/11 Revised prices(USB-USB: 50->55, M0110/IBM4704: 40-> 42, MiniDIN: 30->32)
2016/05/07 new IBM 4704 external converter
2016/08/16 Revised price of M0110 converter 42->45
2016/09/17 Keymap editor is available for USB-USB, ADB, PS/2, M0110 and NeXT now
2016/09/30 Keymap editor is available for IBM4704 now
PriceUSB-USB: $55USD
M0110: $45USD
IBM4704,Sony NEWS: $42USD
ADB, PS/2, NeXT, SUN, X68K, PC98, IBM Terminal: $32USD
World wide shipping and Paypal fee: $8USD (add $3 per extra converter)
Payment: Paypal Invoice will be sent to your email. You'll be able to make a payment with credit card on Palpal even if you don't have Paypal account.
Lead TimeUSB-USB 9 in stock (Back in stock 2017/02/28)IBM4704 5+ in stock
M0110 3+ in stock
Mini-DIN type 5+ in stock
Sony NEWS 5+ in stock
2017/03
Online Keymap EditorYou can edit keymap on TMK Keymap Editor with web browser. Chrome is recommended web browser.
http://www.tmk-kbd.com/tmk_keyboard/editor/
How to flash firmwareCurrent converters(rev.2) use
ATMega32u2(while rev.1 used
ATMega32u4). You will have to select microcontroller in flash tool like
Atmel FLIP or
dfu-programmer.
See this for detail:
https://github.com/tmk/tmk_keyboard/wiki#flash-firmwareConvertersMini-DIN type Converters These coverters are equivalent in terms of hardware except for Mini-DIN connector.
ADB Converter(4pin)For Apple ADB keyboards.
https://geekhack.org/index.php?topic=14290.0TMK keymap editor is available.for
ADB ConverterPS/2 Converter(6pin)https://geekhack.org/index.php?topic=14618.0TMK keymap editor is available.for
PS/2 ConverterNeXT Converter(5pin)https://github.com/tmk/tmk_keyboard/tree/master/converter/next_usbTMK keymap editor is available.for
NeXT ConverterSUN Converter(8pin) https://github.com/tmk/tmk_keyboard/tree/master/converter/sun_usbX68K Converter(7pin)https://geekhack.org/index.php?topic=29060.0PC98 Converter(8pin)https://github.com/tmk/tmk_keyboard/tree/master/converter/pc98_usbIBM Terminal Converter(pin6)PS/2 Code Set 3 converter
https://geekhack.org/index.php?topic=27272.0USB to USB ConverterThis doesn't convert protocol in fact but you can change keymap and add functions TMK firmware offers to USB keyboard.
https://geekhack.org/index.php?topic=69169.0
TMK keymap editor is available.for
USB-USB ConverterAnd
SpaceFn layout is available just for example.
M0110 ConverterThis supports original keyboard(M0110), keyboard(M0120) and Plus keyboard(M0110A).
https://geekhack.org/index.php?topic=24965.0The converter looks like the pic and includes detachable coiled 4P4C cable. The cable supplied with the converter, it is a 4P4C telephone handset calble which differs from original Apple keyboard cable. Note that
you *cannot* use Apple keyboard cable with this converter, it may damage your keyboard with reverse polarity power lines. Please refer to this for detail.
https://en.wikipedia.org/wiki/Modular_connector#4P4C
Older revisions:
More
TMK keymap editor is available.New editor(recommended):
for
M0110(Mac 128K/512K)for
M0110A(Mac Plus)More
M0110, M0120 and M0110A.

IBM4704 Converterhttps://geekhack.org/index.php?topic=54706.0External converter for all of IBM4704 variants.

Internal converter for 62-key and possiblly other capacitive switch models.
TMK keymap editor is available.for
Capacitive switch 62/77/107-keyfor
Alps switch 102-keySony NEWS converterhttps://geekhack.org/index.php?topic=25759.0More
TMK keymap editor is not available yet.TMK firwmareConverter firmware source codes are available.
https://github.com/tmk/tmk_keyboardFeaturesFAQDesign FilesConverter PCB design files are available, you can make it yourself.
Converter PCB for Min-DIN typehttps://github.com/tmk/keyboard_converterConverter PCB for USB to USBhttps://github.com/tmk/USB2USB_ConverterSupport & FAQOld ConvertersMore
Not available anymore, but TMK firmware still supports these converters.
If you are one of these and have trouble with them contact me, I can help you.
Rev.1 Converter