My Vision (JollyCV)¶

Background¶

JollyCV is a multi-emulator supporting ColecoVision (including Super Game Module), CreatiVision, and My Vision. JollyCV is fast, accurate, and highly portable.

The JollyCV core has been authored by

Rupert Carmichael (carmiker)

The JollyCV core is licensed under

BSD-3-Clause

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

BIOS¶

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

Attention

JollyCV requires a BIOS for ColecoVision or CreatiVision content. Place the following files in RetroArch's system directory.

Filename	Description	md5sum
coleco.rom	ColecoVision BIOS - Required	2c66f5911e5b42b8ebe113403548eee7
bioscv.rom	CreatiVision BIOS - Required	3b1ef759d8e3fb4071582efd33dd05f9

Extensions¶

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

.col
.rom
.myv
.bin

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

Coleco - ColecoVision

Features¶

Frontend-level settings or features that the JollyCV 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 JollyCV core's library name is 'JollyCV'

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

Frontend's Save directory

File	Description
*.srm	Cartridge save

Frontend's State directory

File	Description
*.state#	State

Geometry and timing¶

The JollyCV core's core provided FPS is 60 for NTSC and 50 for PAL
The JollyCV core's core provided sample rate is 48000Hz
The JollyCV core provides adjustable overscan masking and aspect ratio options

Core options¶

The JollyCV core has the following options that can be tweaked from the core options menu. The default setting is bolded.

TMS9918 Palette [jollycv_tmspalette] (TeaTime|SYoung|GCDatasheet)

Set the Palette
Aspect Ratio [jollycv_aspect] (Region-based Pixel Aspect Ratio|Perfectly Square Pixels (1:1 PAR)|Very Traditional NTSC Aspect Ratio (4:3 DAR)|Ostensibly Accurate PAL Aspect Ratio)

Set the Aspect Ratio
Mask Overscan (Top) [jollycv_overscan_t] (16|14|12|10|8|6|4|2|0)

Mask off pixels hidden by a bezel or border on original CRTs (top)
Mask Overscan (Bottom) [jollycv_overscan_b] (16|14|12|10|8|6|4|2|0)

Mask off pixels hidden by a bezel or border on original CRTs (bottom)
Mask Overscan (Left) [jollycv_overscan_l] (8|6|4|2|0)

Mask off pixels hidden by a bezel or border on original CRTs (left)
Mask Overscan (Right) [jollycv_overscan_r] (8|6|4|2|0)

Mask off pixels hidden by a bezel or border on original CRTs (right)