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

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(Created page with "Original guide adapter from a [https://web.archive.org/web/20170626072614/https://www.assemblergames.com/threads/saturn-dreamcast-toslink.57670/ post by citrus3000psi]. This guide assumes the DAC in your Dreamcast is a PCM1725. # Solder directly to the DAC. # Pull power and GND, but can be sourced anywhere. # Also Pin 7 on the TC9231N should get +5 [​IMG] [​IMG] [​IMG] (also available for PS1 and 3DO)")
 
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Original guide adapter from a [https://web.archive.org/web/20170626072614/https://www.assemblergames.com/threads/saturn-dreamcast-toslink.57670/ post by citrus3000psi].
Original guide adapted from a [https://web.archive.org/web/20170626072614/https://www.assemblergames.com/threads/saturn-dreamcast-toslink.57670/ post by citrus3000psi].


This guide assumes the DAC in your Dreamcast is a PCM1725.  
This guide assumes the DAC in your Dreamcast is a PCM1725.


# Solder directly to the DAC.
== Required Materials ==
# Pull power and GND, but can be sourced anywhere.
# Also Pin 7 on the TC9231N should get +5


[​IMG]
* [https://oshpark.com/shared_projects/kvtStGOq Pep Audio 1.2 PCB]


[​IMG]
== Installation ==


[​IMG]
# On the top of the motherboard, solder wires from these four legs on the DAC to the matching pads on the Pep Audio board.
 
## `DATA` on motherboard to `DAT` on Pep Audio PCB ('''not''' `DATA`!).
 
## `BCK` on motherboard to `BC` on Pep Audio PCB.
(also available for PS1 and 3DO)
## `LRCK` on motherboard to `LRC` on Pep Audio PCB.
## `MCLK` on motherboard to `MC` on Pep Audio PCB.
## `+5` on motherboard to `5V` on Pep Audio PCB.
## `GND` on motherboard to `GND` on Pep Audio PCB.
#: [[File:Dreamcast_SPDIF_Mod_1.jpg|400px]]
# Partially reassemble, snaking the board past the metal shield as shown below:
#: [[File:Dreamcast_SPDIF_Mod_2.jpg|400px]]
* Example completed install:
*: [[File:Dreamcast_SPDIF_Mod_3.jpg|400px]]

Revision as of 15:11, 15 July 2023

Original guide adapted from a post by citrus3000psi.

This guide assumes the DAC in your Dreamcast is a PCM1725.

Required Materials

Installation

  1. On the top of the motherboard, solder wires from these four legs on the DAC to the matching pads on 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.
    5. +5 on motherboard to 5V on Pep Audio PCB.
    6. GND on motherboard to GND on Pep Audio PCB.
    Dreamcast SPDIF Mod 1.jpg
  2. Partially reassemble, snaking the board past the metal shield as shown below:
    Dreamcast SPDIF Mod 2.jpg
  • Example completed install:
    Dreamcast SPDIF Mod 3.jpg
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