15.1.1 How to connect a STe-Keyboard

How to connect Mega ST/STe/TT keyboards to ST/STe/Falcon computers

Second edition, August 13, 1995. Sater, Sweden, DHS Bunker.

This description was originally made by Jonas Ekelund back in -91, but it only explained Mega ST keyboard connection, and not Mega STe and TT.

So, here are a slight update with both of them included. Fileformat is GIF, and could be loaded into any decent GIF viewer (ie, something like GemView on Falcon/TT in 256 col mode, or Photochrome/S.O.F. on ST/e).

Picture 1 + 2 - MSTe/TT-Keybord connecting

Both connections have been tried, and works fine, but we don't take any responsibiliy for eventually damaged equipment when using this scheme. You're doing this on your own risk!

Connecting of 260/520/1040ST/F030 (F/FM/E) Keyboards as Text

For a better understanding you found here the pinouts for any atari tos computer. Watch out for differend connectings to the different mainboards!

Picture 3 - RJ45 plug

Watch out for the right pinout of the RJ45 plug on the MegaST(e) keyboards. You have to look on top of the RJ45 plug
Mouse & Joystick lines not listed!
MegaST(e) Keyboards only use +5, GND, RxD and TxD

MegaST - TT - MegaSTe: Pin 1 + 2 +5VDC
Pin 3 TxD
Pin 4 RxD
Pin 5 + 6 GND
260ST - 520ST: Pin 1 GND
Pin 13 +5VDC
Pin 14 RxD
Pin 15 TxD
1040STe - all - and Falcon: Pin 1 GND
Pin 2 ** KEY
Pin 3 FDD/HDD LED
Pin 4 +5VDC
Pin 5 RxD
Pin 6 TxD
Pin 7 Reset
Pin 8 GND
Pin 9 KTOK
Pin 10 KROK