IBM RT PC 10 Hardware Maintenance And Service page 242

2MB Memory Expansion Option
The 2MB Memory Expansion Option provides direct-addressable memory
for the 32-bit processor.
Specifications
Slot positions
Bytes of memory
Memory type
Removal and Replacement Procedures
C,D
2.0M bytes
ECC
Use the "Processor, Floating-Point, or System Memory Removal" on
page 4-14 procedure for removal.
Use the "Processor, Floating-Point, or System Memory Replacement" on
page 4-15 procedure for replacement.
System Memory 6-7