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== WTF? ==
 
== 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 ([http://en.wikipedia.org/wiki/C64_Direct-to-TV C64_Direct-to-TV]).
 
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 ([http://en.wikipedia.org/wiki/C64_Direct-to-TV 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.
 
The joystick can be bought at Conrad (but I've also seen it at Zielpunkt) for ~25 Euros.
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== Connectors ==
 
== 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 :).
+
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:
 
Connectors, seen from the front:
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|}
 
|}
  
== PCB Soldering Points ==
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== Connecting to the PCB ==
  
[[Bild:solderpoints.png|thumb|200px|soldering points on PCB]]
 
  
All soldering should be done on the backside of the PCB. Note that some soldering points are located under the rubber buttons.
+
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.
  
 +
{|
 +
|[[Bild:solderpoints.png|thumb|200px|soldering points on PCB]]
 +
|[[Bild:internal1.png|thumb|200px|Keyboard && disk connectors]]
 +
|-
 +
|[[Bild:internal2.png|thumb|200px|Joystick connectors]]
 +
|[[Bild:internal3.png|thumb|200px|PCB with connectors]]
 +
|}
  
 +
<p>
 +
== 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.
  
== Power Supply ==
+
{|
 +
|[[Bild:regulator_schem.png|200px|regulator schematics]]
  
[[Bild:regulator.png|thumb|200px|+5V voltage regulator]]
+
|[[Bild:regulator.png|200px|+5V voltage regulator]]
[[Bild:regulator_schem.png|thumb|200px|regulator schematics]]
+
[[Bild:regulator_conn.png|thumb|200px|regulator connection]]
+
  
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.
+
|[[Bild:regulator_conn.png|200px|regulator connection]]
 +
|}
 +
== Result ==
 +
 
 +
[[Bild:system.jpg|left|thumb|200px|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 [[Benutzer:MariusKintel|Marius]]
  
 
[[Kategorie:WhateverLab]]
 
[[Kategorie:WhateverLab]]
 
[[Kategorie:RetroGaming]]
 
[[Kategorie:RetroGaming]]

Version vom 14. Juli 2007, 16:33 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