COMMODORE 128 DIAGNOSTIC REV.785260 KEYBOARD DONGLE

This is a Commodore C128, C128D, C128DCR 785260 Diagnostic Keyboard Dongle

Hello,

This is a Commodore C128, C128D, C128DCR 785260 Diagnostic Keyboard Dongle

This is a tested and working circuit. (Tested on Commodore C128 and C128DCR models)

 Commodore 128 Diagnostic Keyboard Dongle is an Easy DIY project, all components are through hole, marked on the PCB, Easy to solder, Easy to make ;)

This C128/C128D/C128DCR Diagnostic Rev.785260 Keyboard dongle need to be used with the following;

a) User Port Dongle

https://www.pcbway.com/project/shareproject/_DIY__USER_PORT_DONGLE_for_C64_586220_DIAGNOSTIC_CARTRIDGE.html

b) Casette Port Dongle

https://www.pcbway.com/project/shareproject/_DIY__CASSETTE_PORT_DONGLE_for_C64_586220_DIAGNOSTIC_CARTRIDGE.html

c) 2pcs. Control Port Dongles

https://www.pcbway.com/project/shareproject/_DIY__CONTROL_PORT_DONGLE_for_C64_586220_DIAGNOSTIC_CARTRIDGE.html

d) Serial port dongle (There are a total of six dongles (5 PCBs) in four projects. You just need to make an extra serial port (disk drive port) dongle using DIN6 male connector and two cables without using PCB.)

e) 785260 Diagnostic Cartridge

https://www.pcbway.com/project/shareproject/_DIY_COMMODORE_128_785260_DIAGNOSTIC_CARTRIDGE_929a0fa0.html

All tests will pass FULLY when all 6 dongles are connected and the 785260 diagnostic cartridge is inserted into the C128/C128D/C128DCR.

There is one important thing to note when using this C128 Diagnostic Keyboard Dongle. When the C128 is turned on with the dongle switch position on, the machine language monitoring software automatically operates as if the RUN/STOP key had been pressed. This is normal and not a malfunction. To run the 785260 diagnostic software, the computer must be turned on with the switch on the dongle in the off position. The switch needs to be turned on once the diagnostic software starts running.

The two control port dongles can only work if the keyboard dongle is connected. Please note,control port dongles only support testing the game paddle functions (controlled by the SID). Control port dongles do not test four joystick directions and fire button functions! With a real joystick and a joystick test program, you must test the four joystick directions and the fire buttons functions separately. ( https://csdb.dk/release/?id=134875 )

Make sure that the dongles are not connected to the Commodore computer in reverse position, incorrectly connecting dongles could damage Commodore computer !

The LED on this keyboard dongle will not light when used with C128DCR models. This is normal because C128DCR models do not have +5V on the keyboard connector.

Many thanks to Jani.

http://blog.worldofjani.com/?p=164

Components:

D-SUB 25 Pin Male Solder Type Connector

D-SUB 25 Pin Female Solder Type Connector

3pin 2.54mm SPDT Slide Switch (RUN/STOP Switch)

LED (optioal)

680 ohm 1/4 watt Resistance (optional)

In order to protect your electronical devices, always turn off your Commodore computer before connecting or unconnecting the dongles or any other device.

Gerber files and component list are subject to change without notice. Before paying for the PCBs, be sure to update your orders!

As you can see I have uploaded many projects and I am still working on new projects. If you have any questions, please look for answers online. Unless I specify explicitly, all my projects are tested and confirmed to work under normal circumstances before being shared. I'm sorry I didn't have enough time to answer all the questions.

Use this PCB at your own risk !

Have fun

Thank you.

C64iSTANBUL