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[[Kategorie:WhateverLab]]
 
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[[Kategorie:RetroGaming]]
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[[Kategorie:Projekte]]

Aktuelle Version vom 24. Januar 2013, 01:41 Uhr

Before
After
After

WTF?

The C64 Direct-to-TV, called C64DTV for short, is a single-chip implementation of the Commodore 64 computer, contained in a joystick with 30 built-in games (C64_Direct-to-TV). The games are stored on a built-in 2MB flash memory.

The joystick can be bought at Conrad (but I've also seen it at Zielpunkt) for ~25 Euros.

This is an amazing piece of hardware, but comes with a few weaknesses:

  • Only one joystick, no support for two-player games
  • A limited selection of games
  • The quality of the joystick itself is far from the gold standard (Competition Pro)

..so let's remedy this:

Project Overview

The goal is to remedy the stated weaknesses by doing the following:

  • Add ports for two external joysticks => support multi-player gaming and we can use better joysticks
  • Add connectors for a PS/2 keyboard and a 1541 compatible disk drive => load games from 5.25" floppy disks

Part List

Parts, Conrad part numbers and total price in Euros:

  • 2x SUB D-Stiftleiste 9 polig 742066 1.14
  • 1x Mini-DIN Steckdose 738422 1.73
  • 1x DIN Einbaubuchse 6-polig 738166 1.20
  • 2x Buchsenleiste 32-polig 740438 2.30
  • 1x 5V 7805 Spannungsregler 179205 0.65
  • 1x 100 uF Elko (we've got more of these in the lab)
  • 2x 100 nF Kondensator (we've got more of these in the lab)

Connectors

I have fitted the connectors onto the casing of the joystick, using a dremel and a glue gun (NB! no gaffa was used in this project :)).

Connectors, seen from the front:

Joystick
Joystick, male
1 Up
2 Down
3 Left
4 Right
6 Fire
6 +5V
8 GND
Keyboard
PS/2 keyboard, female
1 DTA
3 +5V
4 GND
5 CLK
Disk drive
DIN6 disk drive, female
2 GND
3 ATN
4 CLK
5 DTA

Connecting to the PCB

All soldering should be done on the backside of the PCB. Note that some soldering points are located under the rubber buttons. For flexibility, I built internal connectors to easier be able to disconnect and debug the connectors.

soldering points on PCB
Keyboard && disk connectors
Joystick connectors
PCB with connectors

Power Supply

When connecting peripherals to the joystick, it will not be able to run from batteries anymore, so I'm running it from a DC power supply. Since the joystick assumes a 5V power supply, I've build a 5V voltage regulator circuit. The regulator is connected to the output of the battery pack (see picture). NB! Remove batteries before connecting external power.

regulator schematics +5V voltage regulator regulator connection

Result

Modded joystick in action

TODO/ideas

  • Reprogram the built-in flash memory with an updated game collection
  • Add a memory card reader which supports reading disk images stored on a CF/SD/XD/USB-stick/whatever memory card.
For comments, questions, ideas etc., contact Marius