info d550 
D-550 Linear Synthesizer
ROM name="roland_d-550_v1.02_eprom_firmware.ic22" bios="v1.02" size="65536" crc="11b54d24" sha1="d11bdb50c49edababec73a936346a6f918dd0949"
ROM name="roland_d-550_ver_1.01.ic22" bios="v1.01" size="65536" crc="c267019f" sha1="314616d14b91e8c8733aee5dd64736fda8ff6904"
ROM name="d-550__1.0.0.mbm27c512.ic22" bios="v1.0.0" size="65536" crc="f8ec84c3" sha1="00b2b74009bdc0747e11bf57d4dc6c39424c7669"
ROM name="d78312g-022_15179266.ic25" size="8192"
ROM name="roland__r15179858_8801ebi__tc534000p-7477.ic30" No differences from parent set (roland__r15179858_8801ebi__tc534000p-7477.ic30)
🕑 Last update: February 16, 2026
