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Amstrad - CPC (Caprice32)

Background

Caprice32 is a software emulator of the Amstrad CPC 8bit home computer series running on Linux and Windows. The emulator faithfully imitates the CPC464, CPC664, CPC6128, CPC6128+ and GX4000 models. By recreating the operations of all hardware components at a low level, the emulator achieves a high degree of compatibility with original CPC software. These programs or games can be run unmodified at real-time or higher speeds, depending on the emulator host environment.

Author/License

The Caprice32 core has been authored by

  • Ulrich Doewich
  • David Colmenero (D_Skywalk)
  • Colin Pitrat

The Caprice32 core is licensed under

A summary of the licenses behind RetroArch and its cores can be found here.

Extensions

Content that can be loaded by the Caprice32 core have the following file extensions:

  • .dsk
  • .sna
  • .tap
  • .cdt
  • .voc
  • .m3u
  • .cpr
  • .zip

Databases

RetroArch database(s) that are associated with the Caprice32 core:

Features

Frontend-level settings or features that the Caprice32 core respects.

Feature Supported
Restart
Screenshots
Saves
States
Rewind
Netplay
Core Options
RetroAchievements
RetroArch Cheats
Native Cheats
Controls
Remapping
Multi-Mouse
Rumble
Sensors
Camera
Location
Subsystem
Softpatching
Disk Control
Username
Language
Crop Overscan
LEDs

Directories

The Caprice32 core's internal core name is 'cap32'.

The Caprice32 core saves/loads to/from these directories.

Loaded content's directory

  • 'content-name'#.SNA (SNA)

Geometry and timing

  • The Caprice32 core's core provided FPS is 50
  • The Caprice32 core's core provided sample rate is 44100 Hz
  • The Caprice32 core's core provided aspect ratio is 4/3

Usage

The Caprice32 core has a virtual keyboard GUI that can be accessed through SELECT (configured by cap32_combokey) or F9.

The mouse cursor can be controlled by RetroPad D-Pad and use button A to press a Key.

Core options

The Caprice32 core has the following option(s) that can be tweaked from the core options menu.

Tip

Settings with (Restart) means that core has to be closed for the new setting to be applied on next launch.

Core option Description Default
Autorun If enabled, the core will run the first bas/bin found in the DSK. cap32_autorun = "enabled|disabled" enabled
Combo Key See Combo list below. cap32_combokey = "select|y|b|disabled" select
Internal resolution Self-explanatory. cap32_resolution = "384x272|400x300" 384x272
Model (Restart) Choose which Amstrad CPC model to emulate. cap32_model = "6128|464|6128+" 6128
Ram size (Restart) CPC physical RAM size in kB. cap32_ram = "128|64|192|576" 128
Status Bar Status bar configuration cap32_statusbar = "onloading|enabled|disabled" onloading
Floppy Sound Disk emulated sound configuration cap32_floppy_sound = "enabled|disabled" enabled
Monitor Type Choose between a color display or a monochrome display. cap32_scr_tube = "color|green|white" color
Monitor Intensity Screen cathodic tube intensity. cap32_scr_intensity = "5|6|7|8|9|10|11|12|13|14|15" 5
CPC Language (Restart) Choose between english, french or spanish keyboard layout. cap32_lang_layout = "english|french|spanish" english
User 1 Joystick Configuration Select Joy/Overlay configuration for player 1. cap32_retrojoy0 = "joystick|qaop|incentive" joystick
User 2 Joystick Configuration Select Joy/Overlay configuration for player 2. cap32_retrojoy1 = "joystick|qaop|incentive|joystick_port2" joystick

cap32_scr_tube = color

cap32_scr_tube = green

Attention

These 'scr_intensity' core option screenshots have been taken with the 'cap32_scr_tube' core option set to 'color'.

scr_intensity = 5

scr_intensity = 15

Controllers

The Caprice32 core supports the following device type(s) in the controls menu, bolded device types are the default for the specified user(s):

User 1 - 2 device types

  • None - Doesn't disable input. There's no reason to switch to this.
  • RetroPad - Joypad - Don't use this. Switch to Amstrad Joystick for joypad input.
  • Amstrad Joystick - Joypad - Use this for joypad input.
  • Amstrad Keyboard - Keyboard - Keyboard input are always active. Has keymapper support.

Other controllers

  • Mouse - The mouse cursor in the Virtual Keyboard GUI can be controlled with mouse inputs.

Controller tables using RetroPad device Type

JOY CONFIG DEFAULT (JOYSTICK)

User 1 Remap descriptors RetroPad Inputs Amstrad Joystick
B FIRE1
Y
Start
Up JOY UP
Down JOY DOWN
Left JOY LEFT
Right JOY RIGHT
A FIRE2
X
L CTRL
R INTRO
L2 F1
R2 F2
Select COMBO (see bellow)
L3
R3

JOY CONFIG QAOP (GENERAL KEYB)

User 1 Remap descriptors RetroPad Inputs Amstrad Joystick
B B
Y Y
Start K (to select Keyb in games)
Up Q
Down A
Left O
Right P
A SPACE
X N
L CTRL
R INTRO
L2 F1
R2 F2
Select COMBO (see bellow)
L3
R3

JOY INCENTIVE (INCENTIVE GAMES)

User 1 Remap descriptors RetroPad Inputs Amstrad Joystick
B SPACE
Y W
Start F
Up CURSOR UP
Down CURSOR DOWN
Left CURSOR LEFT
Right CURSOR RIGHT
A A
X C
L P
R L
L2 R
R2 U
Select COMBO (see bellow)
L3
R3

COMBO LIST

If you press SELECT you could make a combo with other buttons:

Combo RetroPad Inputs Amstrad Writes
Select + B + CAT
Select + Y + |CPM
Select + Start + SHOW V-KEYBOARD
Select + Up + [1], [Y]
Select + Down + [2], [N]
Select + Left + [4], [S]
Select + Right + [3], [J]
Select + A + RUN"DISK RUN"DISC
Select + X + |TAPE RUN"

This combos are useful to load games and select options in game-menus.

Keyboard

This core allows direct keyboard access, you could use your keyboard as an original CPC. To achieve that you must activate the Game Focus, by default the hotkey is configured to the SCROLL_LOCK key.

English layout

Spanish layout

French layout

Keyboard Binds

RetroKeyboard Special Inputs Amstrad
Keyboard Keypad 0 CPC_KEY_F0
Keyboard Keypad 1 CPC_KEY_F1
Keyboard Keypad 2 CPC_KEY_F2
Keyboard Keypad 3 CPC_KEY_F3
Keyboard Keypad 4 CPC_KEY_F4
Keyboard Keypad 5 CPC_KEY_F5
Keyboard Keypad 6 CPC_KEY_F6
Keyboard Keypad 7 CPC_KEY_F7
Keyboard Keypad 8 CPC_KEY_F8
Keyboard Keypad 9 CPC_KEY_F9
Keyboard Keypad Period . CPC_KEY_FDOT
Keyboard Keypad Enter CPC_KEY_SMALL_ENTER
Keyboard Delete CPC_KEY_CLR
Keyboard Insert CHANGE CURSOR/JOY EMULATION
Keyboard Home PLAY TAPE
Keyboard End STOP TAPE
Keyboard Page Up TAPE REWIND
Keyboard Page Down -
Keyboard F9 SHOW V-KEYBOARD
Keyboard F10 MAIN GUI
Keyboard Right Alt CPC_KEY_COPY
Keyboard Left Alt CPC_KEY_COPY
Keyboard Right Shift CPC_KEY_FIRE2 (JOY EMULATION)
Keyboard Right Control CPC_KEY_FIRE1 (JOY EMULATION)

Choose AMSTRAD KEYBOARD in Quick Menu > Controls to customize your retropad keys per game.

Mouse

RetroMouse Inputs Virtual Keyboard GUI Inputs
Mouse Cursor Mouse Cursor
Mouse 1 Mouse Left Button

M3U and Disk control

When you have a multi disk game, you can use a m3u file to specify each disk of the game and change them from the RetroArch Disk control interface.

A M3U file is a simple text file with one disk per line (see https://en.wikipedia.org/wiki/M3U).

Example: Alive (F).m3u

1
2
Alive (F) - Disk 1A.dsk
Alive (F) - Disk 1B.dsk

Path can be absolute or relative to the location of the M3U file.

When a game ask for it, you can change the current disk in the RetroArch 'Disk Control' menu:

  • Eject the current disk with 'Disk Cycle Tray Status'
  • Select the right disk index
  • Insert the new disk with 'Disk Cycle Tray Status'

Specify a specific command to launch a game

If the autorun option of the core does a pretty good job to guess what command must be executed to launch a game on the CPC, there is some problems (cpm disk and strange catalogs for the most).

You can specify a command to be executed on the CPC when the emu launch.

All you have to do is to add a comment like this in the m3u file :

#COMMAND:<YOUR_COMMAND_HERE>

Even for one disk game, you can create a m3u file like this one :

Jack the Nipper II... In Coconut Capers.m3u

#COMMAND:|CPM
Jack the Nipper II... In Coconut Capers (E).dsk

See also

Amstrad - CPC


Last update: 2022-10-01