Motivated seller make an offer.

Roland JX-8P in very good condition, with the rare Vecoven mod and a brand new retroaktiv MPG-8 programmer that also takes advantage of the vecoven mod with controls. Comes with JX-8P, programmer, and power cable.

Here's the vecoven mod info from the creator Vecoven..
JX8P Ten years ago, I started a project to upgrade my loved JX10. This turns into a huge project where I ended up rewriting the complete firmware from scratch. Many people are enjoying their new JX10 or MKS70 with my firmware. Due to popular demand, I have ported most of the changes done on the JX10 to the JX8P. The little brother can now benefit from all these enhancements!
New featuresIn a nutshell, the rewrite provides :
New midi implementation

• each parameter is now OFF/RECV/SEND/ON, allowing fine control of what gets sent and what is filtered.
• sysex support : allow editing of tone parameters individually, including the "patch" parameters.
• midi cc support : allow editing of all tone parameters with midi cc.
• fast bulk dump/load : 1-2 seconds to dump everything. Can dump to/from cartridge and internal memory.
• edition of parameters (patch and tones) sends sysex, so all editions can be sequenced. PG800 is also supported here, so editions made from the PG800 can also be sequenced.
• copy from/to cartridge to create a full backup of the internal memory (all settings are now copied to the cartridge or restored from it)
• flash module provides 32 internal banks (total of 32 x 32 tones = 1024 tones!). Preloaded with hundreds of tones.
• M16C and M64C support : provide one or four extra banks of tones.
• Import mode to load existing internet "dump" files directly into a bank.

Controls

• any tone parameter can be assigned to the edit slider during play mode [coming soon !]

PG800 and mini-PG800 support
New display options

• control whether updates from sysex, pg800 or controllers are displayed temporarily on-screen

Compatibility mode

• allows to disable new features for full compatibility with old software (for example, sysex changes made to tone A can be redirected to the currently selected tone, etc...)

Arpeggiator

• Now available! See release notes and download section (version 5.04 and up).

Chord mode

• Now available! See release notes and download section (version 5.05 and up).