NEC - PC-FX (Beetle PC-FX)¶

Background¶

Beetle PC-FX is a port of Mednafen PC-FX video game system emulator for the NEC PC-FX.

Author/License¶

The Beetle PC-FX core has been authored by

Mednafen Team

The Beetle PC-FX core is licensed under

GPLv2

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

Extensions¶

Content that can be loaded by the Beetle PC-FX core have the following file extensions:

.cue
.ccd
.toc
.chd

Databases¶

RetroArch database(s) that are associated with the Beetle PC-FX core:

NEC - PC-FX

BIOS¶

Required or optional firmware files go in the frontend's system directory.

Filename	Description	md5sum
pcfx.rom	PC-FX BIOS v1.00 - 2 Sep 1994 - Required	08e36edbea28a017f79f8d4f7ff9b6d7

Features¶

Frontend-level settings or features that the Beetle PC-FX 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 Beetle PC-FX core's internal core name is 'Mednafen PC-FX'

The Beetle PC-FX core saves/loads to/from these directories.

Frontend's Save directory

'content-name'.srm (Save)

Frontend's State directory

'content-name-.state# (State)

Geometry and timing¶

The Beetle PC-FX core's core provided FPS is 60
The Beetle PC-FX core's core provided sample rate is 44100 Hz
The Beetle PC-FX core's core provided aspect ratio is 4/3

Loading PC-FX content¶

Beetle PC-FX needs a cue-sheet that points to an image file. A cue sheet, or cue file, is a metadata file which describes how the tracks of a CD or DVD are laid out.

If you have e.g. foo.bin, you should create a text file and save it as foo.cue. If you're playing a single-track Saturn game, then the cue file contents should look like this:

foobin.cue

1
2
3

 FILE "foo.bin" BINARY
  TRACK 01 MODE1/2352
   INDEX 01 00:00:00

After that, you can load the foo.cue file in RetroArch with the Beetle PC-FX core.

Attention

Certain PC-FX games are multi-track, so their .cue files might be more complicated.

Core options¶

The Beetle PC-FX core has the following option(s) that can be tweaked from the core options menu. The default setting is bolded.

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

High Dotclock Width (Restart) [pcfx_high_dotclock_width] (1024/256/341)

Emulated width for 7.16MHz dot-clock mode. Lower values are faster, but will cause some degree of pixel distortion.
Suppress Channel Reset Clicks (Restart) [pcfx_suppress_channel_reset_clicks] (enabled/disabled)

Hack to suppress clicks caused by forced channel resets.
Emulate Buggy Codec (Restart) [pcfx_emulate_buggy_codec] (disabled/enabled)

Hack that emulates the codec a buggy ADPCM encoder used for some games' ADPCM.
Sound Quality (Restart) [pcfx_resamp_quality] (3/4/5/0/1/2)

Higher values correspond to better SNR and better preservation of higher frequencies("brightness"), at the cost of increased computational complexity and a negligible increase in latency.
Chroma channel bilinear interpolation (Restart) [pcfx_rainbow_chromaip] (disabled/enabled)

Enable bilinear interpolation on the chroma channel of RAINBOW YUV output. Enabling it may cause graphical glitches with some games.
No Sprite Limit (Restart) [pcfx_nospritelimit] (disabled/enabled)

Remove 16-sprites-per-scanline hardware limit.
Initial scanline [pcfx_initial_scanline] ((0 to 40 in increments of 1. 4 is default.)

Adjust first display scanline.
Last scanline [pcfx_last_scanline] (208 to 238 in increments of 1. 235 is default.)

Adjust last display scanline.
Mouse Sensitivity [pcfx_mouse_sensitivity] (1.00 to 5.00 in increments of 0.25. 1.25 is default.)

Configure the sensitivity of the 'PCFX Mouse' device type,