Ricoh Aficio 1013 Service Manual page 126

USING SERVICE PROGRAM MODE
7
Mode Number/Name
955 Memory Read/Write (Byte Access)
956 Memory Read/Write (Word Access)
B044/B045/B046
Function/[Setting]
Lets you read byte values from arbitrary RAM addresses,
and write values into arbitrary addresses. ( ☛ 5.1.12)
Same as SP7-955, except that access is in (2-byte)
words. DFU
This SP is not intended for use on models outside of
Japan. Always use SP-955 to carry out memory reads and
writes.
5-22 SM