systems:tvc [Batocera.linux

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====== Videoton TVC ======
The TV-Computer (TVC) is an 8-bit home computer manufactured by the Hungarian state-owned company [[wp>Videoton]], headquartered in Székesfehérvár, Hungary. Development began around 1983, with mass production starting in 1986. It was one of the very few domestically designed and manufactured home computers in the [[wp>Eastern_Bloc|Eastern Bloc]], and it holds an important place in Hungarian computing history.

The TVC featured a [[wp>Zilog_Z80|Zilog Z80A]] CPU running at 3.125 MHz, a [[wp>Motorola_6845|Motorola MC6845]] CRTC video controller, and came with a built-in BASIC interpreter. The QWERTZ keyboard included a built-in joystick.

Models produced:
* **TVC 32k** (1986) - 32 KB RAM, ~3,000 units produced
* **TVC 64k** - 64 KB RAM, ~9,000 units produced
* **TVC 64k+** - 64 KB RAM, improved BASIC v2.2, 64 KB VRAM (4x16 KB)

The TVC represented Hungary's effort to provide affordable home computing within the Eastern Bloc without relying on Western imports restricted by [[wp>CoCom|COCOM]] export controls. Despite modest production numbers compared to Western contemporaries, approximately 100 commercial games and 40-50 application programs were published for the platform. A small but active homebrew scene continues to produce new titles today.

This system scrapes metadata for the "tvc" group(s) and loads the ''tvc'' set from the currently selected theme, if available.
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==== Quick reference ====
  * **Emulator:** [[#retroarch|RetroArch]], [[#mame|MAME]]
  * **Core:** [[#libretro:_ep128emu-core|libretro: ep128emu-core]], [[#libretro:_mame|libretro: MAME]]
  * **Folder:** ''/userdata/roms/tvc''
  * **Accepted ROM formats:** ''.cas'', ''.tap'', ''.dsk'', ''.img'', ''.zip''

===== BIOS =====
BIOS files for the ep128emu-core:

^ MD5 checksum ^ Share file path ^ Description ^
| ''8c54285f541930cde766069942bad0f2'' | ''bios/ep128emu/roms/tvc22_sys.rom'' | TVC 2.2 System ROM |
| ''5ce95a26ceed5bec73995d83568da9cf'' | ''bios/ep128emu/roms/tvc22_ext.rom'' | TVC 2.2 Extension ROM |
| ''a2cf86ba8e7fc58b242137fe59036832'' | ''bios/ep128emu/roms/tvcfileio.rom'' | TVC File I/O ROM |
| ''88dc7876d584f90e4106f91444ab23b7'' | ''bios/ep128emu/roms/tvc_dos12d.rom'' | TVC DOS 1.2D ROM |

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Since ep128emu-core version 1.1.0, default ROM images are built into the core, so BIOS files may not be strictly required for basic operation. However, providing the correct BIOS files is recommended for best compatibility.
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BIOS files for MAME:

^ MD5 checksum ^ Share file path ^ Description ^
| | ''bios/mame/tvc64.zip'' | MAME TVC64 ROM set |

===== ROMs =====
Place your Videoton TVC ROMs in ''/userdata/roms/tvc''. Software for the TVC was distributed primarily on cassette tapes (.cas, .tap) and later on floppy disks (.dsk, .img).

===== Emulators =====
==== RetroArch ====
[[https://docs.libretro.com/|RetroArch]] (formerly SSNES), is a ubiquitous frontend that can run multiple "cores", which are essentially the emulators themselves. The most common cores use the [[https://www.libretro.com/|libretro]] API, so that's why cores run in RetroArch in Batocera are referred to as "libretro: (core name)". RetroArch aims to unify the feature set of all libretro cores and offer a universal, familiar interface independent of platform.

=== RetroArch configuration ===
RetroArch offers a **Quick Menu** accessed by pressing ''[HOTKEY]'' + {{:wiki:south.png?nolink&20|South button (B SNES)}} which can be used to alter various things like [[:advanced_retroarch_settings|RetroArch and core options]], and [[:remapping_controls_per_emulator|controller mapping]]. Most RetroArch related settings can be altered from Batocera's EmulationStation.

Standardized features available to all libretro cores: ''tvc.videomode'', ''tvc.ratio'', ''tvc.smooth'', ''tvc.shaders'', ''tvc.decoration'', ''tvc.game_translation''

=== libretro: ep128emu-core ===
The [[https://github.com/libretro/ep128emu-core|ep128emu-core]] is a libretro port of [[https://github.com/istvan-v/ep128emu|ep128emu]] by Istvan Varga (original) and Zoltan Balogh (libretro port). It emulates Z80-based home computers including [[systems:enterprise|Enterprise 64/128]], Videoton TVC, [[systems:amstradcpc|Amstrad CPC]], and [[systems:zxspectrum|ZX Spectrum]].

== libretro: ep128emu-core configuration ==
Standardized features for this core: ''tvc.rewind'', ''tvc.autosave''

=== libretro: MAME ===
The libretro version of [[https://www.mamedev.org/|MAME]] can also be used to emulate the Videoton TVC. It uses the ''tvc64.zip'' MAME ROM set.

==== MAME ====
Standalone [[https://www.mamedev.org/|MAME]] can also be used as an alternative emulator for the Videoton TVC.

===== Controls =====
The Videoton TVC is a computer system, so it primarily uses a **keyboard** for input. A physical USB keyboard is strongly recommended for the best experience.

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The original TVC had a built-in joystick integrated into the keyboard. When using a gamepad, joystick input is mapped automatically by the emulator.
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===== Troubleshooting =====
==== Black screen on boot ====
If using ep128emu-core, the built-in ROM images should allow basic operation without external BIOS files. If you still get a black screen, try placing the correct BIOS files in ''/userdata/bios/ep128emu/roms/''. Use **GAME SETTINGS > MISSING BIOS CHECK** to verify.

==== Software won't load ====
The TVC had multiple models with different RAM configurations. Some software may require a specific model (32k vs 64k vs 64k+). Check the core options for model selection if available.

==== Keyboard layout issues ====
The original TVC used a Hungarian QWERTZ keyboard layout. Some programs may expect specific key positions that differ from a standard QWERTY keyboard.

==== Further troubleshooting ====
For further troubleshooting, refer to the [[:support|generic support pages]].