Sega Saturn switchless MOD Pal bigger mainboard

Inspired of the great site mmmonkey and sebs great code for the Sega Saturn, I will use the PIC 16F630 in a PAL Sega Saturn.

You are in need of a PIC 16F630 with sebs code, some wire, two resistors 220Ohm and a DUAL Led red/Green.

It is a PC BD SATURN MAIN VA9 Board Pal Mainboard.

If you can’t do it yourself, we can take care of your Sega Saturn

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At the solder Side you will find some Jumper from JP 6 to JP 13

Remove the three marked Jumper JP7,JP10,JP12 for Language preparation

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remove Jumper 2 (50Hz, 60Hz switching)

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to make switching to 60Hz work, you need to desolder and pull up PIN 1 of IC20 and wire it to GND

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cut the following circuit path on the Parts Site at the reset switch

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Here you can see the wiring of the PIC

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some zooming pictures

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Here you can see the 5mm DUO Led green/red and the Reset Wiring

Use this way for the wires, so you didn’t cut some during the reassembling

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Some background Information

The Language Identifikation is working with IC9: 315-5744 A05 Pin 5 to 8

Pin 5 -> JP 6 / JP 7

Pin 6 -> JP 8 / JP 9

Pin 7 -> JP 10 / JP 11

Pin 8 -> JP 12 / JP 13

(If Jumper 6,8,10,12 is set PIN 5,6,7,8 is set to 5V)

(If Jumper 7,9,11,13 is set, PIN 5,6,7,8 is set to GND)

sat_2

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PIC Pinout / Function

Region

5 (red Led)

6 (gn Led)

Pin8 (JP12)

Pin9 (JP10)

Pin10 (JP6)

12 (VidMode)

EUR

GND

+5V

GND

+5V

+5V

GND

JAPAN

+5V

GND

+5V

GND

GND

+5V

USA

+5V

+5V

GND

+5V

GND

+5V

You can change the Modes via pressing the reset Button of the Saturn
If you press the reset button very short -> The Sega Console will do a reset

If you press the reset button around one second -> The console swaps between 50Hz and 60Hz.

If you hold the reset button for more than one second -> The console will toogle:

Led red Japan Mode (think of the red dot in the japanese flag)

Led orange USA Mode

Led green Europe Mode

The usage of the mod in a video:

http://www.youtube.com/watch?v=hf8kXiFLF6M

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