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---
title: "Classic controllers - Technical details"
weight: 1
hidden: true
---
Internally, these controllers use the same protocol as a standard controller for the corresponding console and input is reported in the data bytes corresponding to buttons (where each bit reports the state of a single button). Only the regular physical buttons have dedicated bits for them; the handles combine three and four bits for the power notches and brake notches, respectively (you can find an example with the Nintendo 64 [here](https://sites.google.com/site/consoleprotocols/home/nintendo-joy-bus-documentation/n64-specific/train-controller)).
## Power handle bit usage
The power handle uses a combination of three bits (buttons) to represent each notch.
| Position | POWER 1 | POWER 2 | POWER 3 |
|:----------:|:-------:|:-------:|:-------:|
| N | - | X | X |
| P1 | X | - | X |
| P2 | - | - | X |
| P3 | X | X | - |
| P4 | - | X | - |
| P5 | X | - | - |
| Transition | - | - | - |
## Brake handle bit usage
The brake handle uses a combination of four bits (buttons) to represent each notch.
| Position | BRAKE 1 | BRAKE 2 | BRAKE 3 | BRAKE 4 |
|:----------:|:-------:|:-------:|:-------:|:-------:|
| Released | - | X | X | X |
| B1 | X | - | X | X |
| B2 | - | - | X | X |
| B3 | X | X | - | X |
| B4 | - | X | - | X |
| B5 | X | - | - | X |
| B6 | - | - | - | X |
| B7 | X | X | X | - |
| B8 | - | X | X | - |
| Unmarked 1 | X | - | X | - |
| Unmarked 2 | - | - | X | - |
| Unmarked 3 | X | X | - | - |
| Unmarked 4 | - | X | - | - |
| Unmarked 5 | X | - | - | - |
| Emergency | - | - | - | - |
| Transition | X | X | X | X |
The unmarked positions can be found between **B8** and **Emergency** and produce no click when moving the handle.
## Button mapping to a standard controller
Because they use the same data bytes, the input between a Densha de GO! controller and a standard controller for each console can be matched as follows:
| Densha de GO! | Nintendo 64 | Sony PlayStation 1 | Sega Dreamcast | Sega Saturn |
|:-------------:|:-----------:|:------------------:|:--------------:|:-----------:|
| SELECT | R | SELECT | D | ?? |
| START | START | START | START | START |
| A | B | SQUARE | A | A |
| B | A | CROSS | ?? | B |
| C | L | CIRCLE | C | C |
| POWER 1 | RIGHT | TRIANGLE | Z | X |
| POWER 2 | UP | LEFT | Y | Y |
| POWER 3 | Z | RIGHT | X | Z |
| BRAKE 1 | C RIGHT | L1 | UP | L |
| BRAKE 2 | C LEFT | L2 | DOWN | R |
| BRAKE 3 | C DOWN | R1 | LEFT | DOWN |
| BRAKE 4 | C UP | R2 | RIGHT | LEFT |
This can be used with a USB adapter to read the controller input from a PC.