Commodore VIC-20 Manuale utente

2022/04/18 09:34 1/5 Commodore VIC-20

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This article needs some TLC. Read at your own risk.

Commodore VIC-20

The Commodore VIC-20 is an 8-bit home computer developed by

Commodore. It was released in 1980.

In Germany, it was known as the “VC-20” instead, due to the

rather unfortunate similarity between the pronounciation of “VIC”

with another certain German word…

The VIC-20 was succeeded by the Commodore 64 two years later.

This system scrapes metadata for the “c64” group and loads the

c20 set from the currently selected theme, if available.

Quick reference

Emulator: VICE

Core: VICE: xvic

Folder: /userdata/roms/c20

Accepted ROM formats: .a0, .b0, .crt, .d64, .d81, .prg, .tap, .t64, .m3u, .zip, .7z

BIOS

This needs conﬁrmation.

No Commodore VIC-20 emulator in Batocera needs a BIOS ﬁle to run.

ROMs

Needs polish/alternatives/automated script(?)

Place your Commodore VIC-20 ROMs in /userdata/roms/c20.

For now, ROMs must be manually speciﬁed in VICE in order to use them with its VIC-20 emulator.

Last update: 2021/12/18 01:44 systems:c20 https://wiki.batocera.org/systems:c20

https://wiki.batocera.org/ Printed on 2022/04/18 09:34

Launch the game, and you will be greeted with the following screen1.

Open VICE's menu with [START].2.

Go to Cartridge → Add to generic cartridge.3.

Choose the cartridge type appropriate to your ROM (“4/8KiB” is ﬁne for most).4.

Select your intended ROM.5.

2022/04/18 09:34 3/5 Commodore VIC-20

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Exit the menu with [START].6.

Programs (PRG)

A “program” is a C64 executable ﬁle that you would LOAD and then RUN on a real C64. Using it with

an emulator usually bypasses the loading process, injecting the ﬁle directly into the memory, and

then automatically runs it (so there is no tape, disc or cartridge inserted). Emulators can also run

programs that could not work on a real C64 because they use memory that can not be accessed

during the real loading process. The most famous example is the “Oneload” collection of C64 games,

which are very emulator friendly as they bypass all loading and unpacking times.

Most PRGs are “crunched”, meaning they have been optimized to use the least possible amount of

disk space in order to ﬁt more games on one disk or reduce loading times. Decrunching usually takes

up to 20 seconds and is identiﬁed by wildly ﬂickering color bars in the border area.

Last update: 2021/12/18 01:44 systems:c20 https://wiki.batocera.org/systems:c20

https://wiki.batocera.org/ Printed on 2022/04/18 09:34

Cartridges (CRT)

The C64 has a cartridge port and .crt ﬁles emulate these cartridges.

Enter VICE's menu with [START], then Cartridge → Attach CRT image → Set current cartridge

as default. Back out to the main menu, Settings Management and ﬁnally Save current settings.

Tapes (TAP)

Loading from tapes is a long process and if you want the full experience, there are .tap images for

many games that are representations of the audio on the tape and therefore you enjoy the same load

times of several minutes for one game. As many later C64 games actually include extra music and

graphics during the load, these large (several 100 KB) ﬁles are important for digital preservation. If a

tape ﬁle is smaller than roughly 40KB most likely it is actually just a PRG ﬁle hiding inside a wrapper

that can be loaded instantly.

Disks (D64, D81)

todo

Multi Disk Games (ZIP, M3U)

Many games use two sided disks or more than one disk. A two sided disk must be ﬂipped manually on

a 1541, so you would eject the disk, ﬂip it around and re-insert it. The standard naming convention for

such disks is Disk 1 - Side A and Disk 1 - Side B, followed of course by Disk 2 - Side A and so on.

2022/04/18 09:34 5/5 Commodore VIC-20

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Emulators

VICE

VICE conﬁguration

Standardized features available to all cores of this emulator: c20.videomode, c20.ratio,

c20.padtokeyboard, c20.decoration

ES setting name batocera.conf_key Description ⇒ ES option key_value

Settings that apply to all cores of this emulator

ZOOM (HIDE BORDERS) c20.noborder

Hides borders on many games. Some games used the

borders.

⇒ NO (DEFAULT) 0, YES 1.

Border Graphics and Zoom Mode

todo

Controls

Here are the default Commodore VIC-20's controls shown on a Batocera RetroPad:

Troubleshooting

Further troubleshooting

VICE itself has an extensive user manual.

For further troubleshooting, refer to the generic support pages.

From:

https://wiki.batocera.org/ - Batocera.linux - Wiki

Permanent link:

https://wiki.batocera.org/systems:c20

Last update: 2021/12/18 01:44

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