Yamaha DX7s Owner's Manual page 97

The 8 types of format are as follows: The 8 types of format are as follows:
Data
Performance edit buffer
Packed 32 performance
System setup
Micro tuning edit buffer
Micro tuning with memory
Micro ro tuning in cartridge
Fractional scaling edit buffer
Fractional scaling in cartridge
Classification name
LM_ _
LM_ _
LM_ _
LM__
LM_ _
LM_ _
LM_ _
LM_ _
Add-8
Data format name
8973PE
8973PM
8973S_
MCRYE
MCRYMx
MRCYC_
FFKSYE_
FKSYC_