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61 lines
1.7 KiB
Markdown
61 lines
1.7 KiB
Markdown
# `GULDJ-JS`: Beatmania IIDX Rootage art and turntable bypass kit
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## Turntable bypass cable
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If you upgraded a [C02 wired cabinet](../io.md#c02-io), the turntables are connected to the
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sub IO via a serial line that goes to another sub IO behind the front panel
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next to the 16seg display. This introduces additional latency as the input
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data needs to pass through multiple systems/PCBs until it reaches the game.
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This can be reduced by using a so-called "bypass" cable, that connects the
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turntables directly to the [BIO2 sub IO](../io.md#bio2-ldj-sub-io) board by emulating the wiring of a
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[D01 IO](../io.md#d01-io) based cabinet, reducing latency significantly.
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This cable could be ordered with the IIDX Rootage upgrade kit but can also
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be easily created from scratch.
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### Parts
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* Some wires
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* [JST HL](https://jst.de/file/download/219/pitch-3-96-mm-wtw-hl2-pdf) 2x4 pin female connector
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* [JST HVQ](https://jst.de/file/download/637/hvq) 8 pin female connector
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* Matching terminals for the connectors
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### Pinout
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```text
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JST HL 2x4 pin front view connector
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notch at top
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___
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|---------|
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| 1 2 3 4 |
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| 5 6 7 8 |
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|---------|
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```
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```text
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JST HVQ 8 pin front view connector
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Numbering on connector matches
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notch at top
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___________________
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-------------------
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|-----------------|
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| 1 2 3 4 5 6 7 8 |
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|-----------------|
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```
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Pins of the two connectors need to be connected like this:
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| JST HL 2x4 pin | JST 8 pin |
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|----------------|-----------|
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| 1 | 1 |
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| 2 | 1 |
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| 3 | 3 |
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| 4 | 2 |
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| 5 | 5 |
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| 6 | 4 |
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| 7 | 8 |
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| 8 | 8 |
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