IBM RT PC 10 Hardware Maintenance And Service page 240

1MB Memory
Expansion Option
The 1MB Memory Expansion Option provides direct-addressable memory
fOf the 32-bit processor.
Specifications
Slot positions
Bytes of memory
Memory type
Removal and Replacement Procedures
C,D
1.0M bytes
ECC
Use the "Processof, Floating-Point, or System Memory Removal" on
page 4-14 procedure for removal.
Use the "Processof, Floating-Point, or System Memory Replacement" on
page 4-15 procedure for replacement.
System Memory 6-5