Dreamcast


dreamcast


The Sega Dreamcast is a 6th generation home video game console released by Sega in 1998. It is notably the last console that Sega produced.


Emulator Rom Folder Extension BIOS Controller Config
Reicast dreamcast .cdi .gdi dc_boot.bin, dc_flash.bin /opt/retropie/configs/dreamcast/mappings

Emulator: Reicast

It can be very laggy and buggy, but some games work great (see compatibility list below). Pi 2 is required.

Audio is choppy and not great, and degrades the longer the emulator is in use. Restarting the emulator (and ultimately the Pi) may become a good idea after a couple hours of gameplay. There is a memory leak somewhere in the Reicast code. Low screen resolution are recommended to get best performance. Performance suffers if HD resolutions are used.

ROMS

Accepted File Extensions: .cdi .gdi

Place your Dreamcast ROMs in

/home/pi/RetroPie/roms/dreamcast

DREAMCAST COMPATIBILITY LIST feel free to contribute to the list.

BIOS

The BIOS files needed are: dc_boot.bin, dc_flash.bin. The boot file is often found named something else, such as dc_bios.bin. It must be renamed to dc_boot.bin when placed in the BIOS folder.

Place your BIOS files in

/home/pi/RetroPie/BIOS

BIOS files

File Region md5sum CRC32 Comment
dc_boot.bin World e10c53c2f8b90bab96ead2d368858623 89f2b1a1
dc_flash.bin USA 0a93f7940c455905bea6e392dfde92a4 c611b498
dc_flash.bin Europe 23df18aa53c8b30784cd9a84e061d008 b7e5aeeb
dc_flash.bin Japan 69c036adfca4ebea0b0c6fa4acfc8538 5f92bf76
dc_boot.bin Free d407fcf70b56acb84b8c77c93b0e5327 61d5613f Hack
dc_flash.bin Free 93a9766f14159b403178ac77417c6b68 e0d202a2 Hack
dc_boot.bin Free d552d8b577faa079e580659cd3517f86 558f456e atreyu187 Hack
dc_flash.bin Free 74e3f69c2bb92bc1fc5d9a53dcf6ffe2 bda0e9aa atreyu187 Hack

Note: If you are having trouble with having to set the date/time every time you load Reicast, see this forum post for a guide on how to replace dc_flash.bin. The MD5 of the dc_flash.bin generated from that guide should be 2f818338f47701c606ade664a3e16a8a

Video Setup Guide

RetroPie Dreamcast emulation

RetroPie 4.0 uses an output resolution independent render resolution of 640x480. Open /home/pi/.reicast/emu.cfg to modify render resolution.

Tweaks

/opt/retropie/configs/all/autoconf.cfg
Option Description Value
reicast_input enable input auto configuration (0/1)

VMUs

VMUs are stored as .BIN files under /home/pi/.reicast/, and will be automatically created the first time you run Reicast without VMU files.

On occasion, these VMUs do not get formatted quite right during creation, and the Dreamcast can't save or load data from them. They just need to be reformatted -- run the SYSTEMMANAGER entry in the EmulationStation Dreamcast menu and / or see this post for details.

A Dreamcast soft-reset (A+B+X+Y+Start buttons at the same time) at the ROM's title screen will also take you into the Dreamcast BIOS to manage the VMU's. After formatting VMU's, exit the emulator and restart. Pressing 'Play' will cause Reicast to crash.

Controls

Starting with RetroPie 3.3 controls for the Dreamcast Emulator are automatically configured when you configure your controls through emulationstation.

sega_dreamcast_diagram

Controls can be mapped via the /home/pi/.reicast/emu.cfg file. Make sure that evdev_device_id_1 & evdev_device_id_2 are set to the corresponding controller's /dev/input/event* number you want to use. A -1 means no controller which we will use for player 3 and 4. Then have evdev_mapping_1 & evdev_mapping_2 point to the matching controller mapping configuration files and both can either point to the same file or different files if you want to use 2 different controllers types.

Here is an example of this:

[input]
evdev_device_id_1 = 2
evdev_device_id_2 = 3
evdev_device_id_3 = -1
evdev_device_id_4 = -1
evdev_mapping_1 = /opt/retropie/configs/dreamcast/mappings/controller_Xbox360WirelessReceiver(XBOX).cfg
evdev_mapping_2 = /opt/retropie/configs/dreamcast/mappings/controller_8BitdoSNES30GamePad.cfg
joystick_device_id = -1

If you want to be able to use 2 controllers at the same time, then you would add this section to the emu.cfg file:

[players]
nb = 2

An example mapping for a PS3 controller is below for reference:

PlayStation 3 Controller

[PLAYSTATION(R)3 Controller]
button.0=Btn_Z
button.1=Btn_C
button.2=Btn_D
button.3=Btn_Start
button.4=DPad_Up
button.5=DPad_Right
button.6=DPad_Down
button.7=DPad_Left
button.8=Axis_LT
button.9=Axis_RT
button.10=DPad2_Left
button.11=DPad2_Right
button.12=Btn_Y
button.13=Btn_B
button.14=Btn_A
button.15=Btn_X
button.16=Quit
axis.0=Axis_X
axis.1=Axis_Y

If mapping is not working correctly try changing controller name for:

[Sony PLAYSTATION(R)3 Controller]

For Wireless PS3 Controller use:

[PLAYSTATION(R)3 Controller (xx:xx:xx:xx:xx:xx)]

Replace xx:xx:xx:xx:xx:xx with your own controller mac address

Press ctrl+c to exit- Or map a Quit button (PS) as shown above :D

Xbox 360 Controller:

[emulator]
mapping_name = Xbox Gamepad (userspace driver)
btn_escape = 0x13a

[dreamcast]
btn_a = 0x130h
btn_b = 0x131h
btn_c = 
btn_d = 0x139h
btn_x = 0x133h
btn_y = 0x134h
btn_z = 0x138h
btn_start = 0x13Bh
axis_x = 0x00
axis_y = 0x01
axis_trigger_left = 0x0a
axis_trigger_right = 0x09

[compat]
axis_dpad1_x = 0x10
axis_dpad1_y = 0x11

Xbox 360 Wireless Controller using xpad driver:

[emulator]
mapping_name = Xbox 360 Wireless Receiver (XBOX)
btn_escape = 316

[dreamcast]
btn_a = 304
btn_b = 305
btn_c =
btn_d =
btn_x = 307
btn_y = 308
btn_z =
btn_start = 315
btn_dpad1_left =
btn_dpad1_right =
btn_dpad1_up = 704
btn_dpad1_down = 707
btn_dpad2_left =
btn_dpad2_right =
btn_dpad2_up =
btn_dpad2_down =
axis_x = 0
axis_y = 1
axis_trigger_left = 10
axis_trigger_right = 9

[compat]
btn_trigger_left = 312
btn_trigger_right = 313
axis_dpad1_x = 16
axis_dpad1_y = 17
axis_dpad2_x =
axis_dpad2_y =
axis_x_inverted = no
axis_y_inverted = no
axis_trigger_left_inverted =
axis_trigger_right_inverted =
axis_dpad1_y_inverted = no
axis_dpad1_x_inverted = no

iBuffalo USB controller

button.0=Btn_B
button.1=Btn_A
button.2=Btn_Y
button.3=Btn_X
button.4=DPad2_Left
button.5=DPad2_Right
button.6=Quit
button.7=Btn_Start
axis.0=Axis_X
axis.1=Axis_Y

PS4 Controller:

[emulator]
mapping_name = Sony Computer Entertainment Wireless Controller
btn_escape = 316

[dreamcast]
btn_a = 305
btn_b = 306
btn_x = 304
btn_y = 307
btn_start = 313
axis_x = 0
axis_y = 1
axis_trigger_left = 3
axis_trigger_right = 4

[compat]
axis_dpad1_x = 16
axis_dpad1_y = 17
axis_x_inverted = no
axis_y_inverted = no
axis_trigger_left_inverted = no
axis_trigger_right_inverted = no
axis_dpad1_y_inverted = no
axis_dpad1_x_inverted = no

Akishop Ps 360+ Joystick

[emulator]
mapping_name = Akishop Customs PS360+ v1.66
btn_escape = 316

[dreamcast]
btn_a = 306
btn_b = 305
btn_x = 307
btn_y = 304
btn_start = 312

[compat]
axis_dpad1_x = 16
axis_dpad1_x_inverted = no
axis_dpad1_y = 17
axis_dpad1_y_inverted = no
btn_trigger_left = 309
btn_trigger_right = 311

8Bitdo NES30 Pro

Open the configuration file using a text editor, e.g.:

sudo nano /opt/retropie/configs/dreamcast/mappings/controller_8BitdoNES30Pro.cfg

The content of the file should look like this:

[emulator]
mapping_name = 8Bitdo NES30 Pro
btn_escape = 314

[dreamcast]
btn_a = 304
btn_b = 305
btn_c =
btn_d =
btn_x = 307
btn_y = 308
btn_z =
btn_start = 315
btn_dpad1_left =
btn_dpad1_right =
btn_dpad1_up =
btn_dpad1_down =
btn_dpad2_left =
btn_dpad2_right =
btn_dpad2_up =
btn_dpad2_down =
axis_x = 0
axis_y = 1
axis_trigger_left = 24
axis_trigger_right =

[compat]
btn_trigger_left = 310
btn_trigger_right = 311
axis_dpad1_x = 16
axis_dpad1_y = 17
axis_dpad2_x =
axis_dpad2_y =
axis_x_inverted = no
axis_y_inverted = no
axis_trigger_left_inverted =
axis_trigger_right_inverted =
axis_dpad1_y_inverted = no
axis_dpad1_x_inverted = no

Mobile Gamepad [EXPERIMENTAL]

[emulator]
mapping_name = MobileGamePad
btn_escape = 0x13a

[dreamcast]
btn_a = 0x130
btn_b = 0x131
btn_c = 0x136
btn_d = 0x137
btn_x = 0x133
btn_y = 0x134
btn_z =
btn_start = 0x13b
btn_dpad1_left =
btn_dpad1_right =
btn_dpad1_up =
btn_dpad1_down =
btn_dpad2_left =
btn_dpad2_right =
btn_dpad2_up =
btn_dpad2_down =
axis_x = 0x00
axis_y = 0x01
axis_trigger_left =
axis_trigger_right =

[compat]
btn_trigger_left = 0x138
btn_trigger_right = 0x139
axis_dpad1_x =
axis_dpad1_y =
axis_dpad2_x =
axis_dpad2_y =
axis_x_inverted = no
axis_y_inverted = no
axis_trigger_left_inverted =
axis_trigger_right_inverted =

For mapping non-standard controller via @Folly

run in terminal :

cd /opt/retropie/emulators/reicast/bin

Here is a script called 'reicast-joyconfig' run it :

./reicast-joyconfig

Choose your joystick. Now you can map your buttons. When all is done it outputs the text for making a file in /home/pi/.reicast/mappings

It outputs something like this (numbers are in decimals not hexadecimal such as in other contoller.cfg's(0x13b)): [emulator] mapping_name = Your Gamepad btn_escape = 316

[dreamcast] .......etc

make a file in /home/pi/.reicast/mappings called controller_Your Gamepad.cfg and paste the text in this file.