Roland D-550 firmware OS upgrade v1.02 – Final Revision
This is firmware revision 1.02 and is the latest official released operation system by Roland. This operation system update/upgrade requires one eprom chip as revealed in the article`s photos and the chip will be labeled to help you locate the correct chip socket. For more info, please check below.
Two options to check current OS:
-  and [Exit], while powering device.
- [Patch bank 2] and [Edit], while powering device.
Version 1.02 upgrade is intended to iron out any remaining bugs affecting general stability and improve performance within the firmware code.
- Fully verified before shipping and professionally packaged in anti-static material.
- Some older board revisions may have the OS room soldered in place.
- IC socket is located on IC 22