Saturn:Digital Audio (SPDIF) Mod: Difference between revisions

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Original guide adapted from a [https://web.archive.org/web/20170626072614/https://www.assemblergames.com/threads/saturn-dreamcast-toslink.57670/ post by citrus3000psi]. A good writeup about this mod can be found on [https://www.firebrandx.com/psxdigitalaudio.html FireBrandX's site].  
There are two boards that will allow you to obtain digital audio: Will's Sega Saturn SPDIF Kit and the Pep Audio board by citrus3000psi. There are some reports of issues with the Pep Audio board, so you may want to opt for Will's kit.


This tutorial assumes you have a TDA1386T DAC chip in your Saturn.  
== Will's Sega Saturn SPDIF Kit ==
 
=== Required Parts ===
* [https://www.willsconsolemodifications.co.uk/index.php?route=product/product&path=59_73&product_id=59 Will's Sega Saturn SPDIF Kit]
* (Optional) [https://www.laserbear.net/products/sega-saturn-toslink-spdif-battery-door TOSLINK battery door]
 
=== Installation ===
 
# Connect wires from the mod kit board solder points (under the blue line) to the following points to the Sega Saturn DAC chip using the table below to find the corresponding Chip Leg Number on the DAC Chip.
#: [[File:Sega Saturn SPDIF Kit - 1.png|400px]]
# If your Saturn has the TDA1386 DAC, Please close jumper "J1". If your Saturn has the PCM1710 DAC, Please close jumper "J2".
#: [[File:Sega Saturn SPDIF Kit - 2.png|400px]]
# The Sega Saturn has 3 types of DAC Chips depending on the motherboard version number, locate the DAC chip on your motherboard to find which one you have.
 
{| class="wikitable"
|-
! Signal !! TDA1386T !! PCM1710 !! PCM1717E !! YMF292 (SCSP)
|-
| EMPH: Emphasis || Example || Example || C62 North Pad || Example
|-
| RST: Reset || Example || Example || Pin 18 on IC || Example
|-
| ILRCK: Word Clock || Example || Example || TP112 || Example
|-
| ISCLK: Bit Clock || Example || Example || TP111 || Example
|-
| SDIN: Audio Data || Example || Example || TP110 || Example
|-
| OMCK: Master Clock || Example || Example || TP113 || Example
|}
 
# Connect the following 3 points to the SPDIF connector and find a suitable mounting location for the connector.
#: [[File:Sega Saturn SPDIF Kit - 4.png|400px]]


== Pep Audio Board (SPDIF or TOSLINK) ==
== Pep Audio Board (SPDIF or TOSLINK) ==
Original guide adapted from a [https://web.archive.org/web/20170626072614/https://www.assemblergames.com/threads/saturn-dreamcast-toslink.57670/ post by citrus3000psi]. A good writeup about this mod can be found on [https://www.firebrandx.com/psxdigitalaudio.html FireBrandX's site].
This tutorial assumes you have a TDA1386T DAC chip in your Saturn.


=== Required Parts ===
=== Required Parts ===
Line 46: Line 81:
* Example completed install:
* Example completed install:
*: [[File:Saturn SPDIF Mod 5.jpg|400px]]
*: [[File:Saturn SPDIF Mod 5.jpg|400px]]
== Will's Sega Saturn SPDIF Kit ==
=== Required Parts ===
* [https://www.willsconsolemodifications.co.uk/index.php?route=product/product&path=59_73&product_id=59 Will's Sega Saturn SPDIF Kit]
* (Optional) [https://www.laserbear.net/products/sega-saturn-toslink-spdif-battery-door TOSLINK battery door]
=== Installation ===
# Connect wires from the mod kit board solder points (under the blue line) to the following points to the Sega Saturn DAC chip using the table below to find the corresponding Chip Leg Number on the DAC Chip.
#: [[File:Sega Saturn SPDIF Kit - 1.png|400px]]
# If your Saturn has the TDA1386 DAC, Please close jumper "J1". If your Saturn has the PCM1710 DAC, Please close jumper "J2".
#: [[File:Sega Saturn SPDIF Kit - 2.png|400px]]
# The Sega Saturn has 3 types of DAC Chips depending on the motherboard version number, locate the DAC chip on your motherboard to find which one you have.
#: {| class="wikitable"
|-
! Signal !! TDA1386T !! PCM1710 !! PCM1717E !! YMF292 (SCSP)
|-
| EMPH: Emphasis || Example || Example || C62 North Pad || Example
|-
| RST: Reset || Example || Example || Pin 18 on IC || Example
|-
| ILRCK: Word Clock || Example || Example || TP112 || Example
|-
| ISCLK: Bit Clock || Example || Example || TP111 || Example
|-
| SDIN: Audio Data || Example || Example || TP110 || Example
|-
| OMCK: Master Clock || Example || Example || TP113 || Example
|}
# Connect the following 3 points to the SPDIF connector and find a suitable mounting location for the connector.
#: [[File:Sega Saturn SPDIF Kit - 4.png|400px]]

Revision as of 11:06, 15 July 2023

There are two boards that will allow you to obtain digital audio: Will's Sega Saturn SPDIF Kit and the Pep Audio board by citrus3000psi. There are some reports of issues with the Pep Audio board, so you may want to opt for Will's kit.

Will's Sega Saturn SPDIF Kit

Required Parts

Installation

  1. Connect wires from the mod kit board solder points (under the blue line) to the following points to the Sega Saturn DAC chip using the table below to find the corresponding Chip Leg Number on the DAC Chip.
    Sega Saturn SPDIF Kit - 1.png
  2. If your Saturn has the TDA1386 DAC, Please close jumper "J1". If your Saturn has the PCM1710 DAC, Please close jumper "J2".
    Sega Saturn SPDIF Kit - 2.png
  3. The Sega Saturn has 3 types of DAC Chips depending on the motherboard version number, locate the DAC chip on your motherboard to find which one you have.
Signal TDA1386T PCM1710 PCM1717E YMF292 (SCSP)
EMPH: Emphasis Example Example C62 North Pad Example
RST: Reset Example Example Pin 18 on IC Example
ILRCK: Word Clock Example Example TP112 Example
ISCLK: Bit Clock Example Example TP111 Example
SDIN: Audio Data Example Example TP110 Example
OMCK: Master Clock Example Example TP113 Example
  1. Connect the following 3 points to the SPDIF connector and find a suitable mounting location for the connector.
    Sega Saturn SPDIF Kit - 4.png

Pep Audio Board (SPDIF or TOSLINK)

Original guide adapted from a post by citrus3000psi. A good writeup about this mod can be found on FireBrandX's site.

This tutorial assumes you have a TDA1386T DAC chip in your Saturn.

Required Parts

Parts are dependent on if you want SPDIF or TOSLINK:

Installation

  1. There exists an issue (as noted by FireBrandX with the Pep Audio PCB where some of the boards have extra ground fill in front of the pins and cause shorts. Use a multimeter to make sure none of the pads (GND excluded) have continuity to GND. If you do find continuity, you will need to use a hobby knife to cut off the area marked in red below:
    • Saturn SPDIF Mod 6.jpg
  2. Assemble the Pep Audio PCB.
  3. Bridge the "SAT" pad on the Pep Audio PCB to the pad next to it.
  4. On the back of the motherboard, solder these four points to the Pep Audio board.
    1. DATA on motherboard to DAT on Pep Audio PCB (not DATA!).
    2. BCK on motherboard to BC on Pep Audio PCB.
    3. LRCK on motherboard to LRC on Pep Audio PCB.
    4. MCLK on motherboard to MC on Pep Audio PCB.
    Saturn SPDIF Mod 1.jpg
  5. Solder +5V to pin 7 of the TC9231N.
    Saturn SPDIF Mod 2.jpg
  6. Connect the output jack:
    • If using a TOSLINK port, connect +5V and GND to it. Also connect DATA (not DAT!) on the Pep Audio PCB to the In on the TOSLINK port.
    • If using a SPDIF port, connect DATA on the Pep Audio PCB to the data pin and GND to GND.
  7. Mount your SPDIF or TOSLINK PCB. This is one suggested location, but it may depend on what devices you may have installed in your unit.
    Saturn SPDIF Mod 3.jpg
  8. Mount your external jack. This is one suggested location, but may require trimming of the case.
    Saturn SPDIF Mod 4.jpg
  • Example completed install:
    Saturn SPDIF Mod 5.jpg
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