Ibm Personal Computer At 512Kb Memory Expansion Option - IBM RT User's Setup Manual

IBM Personal Computer AT 512KB Memory Expansion Option

You can install two IBM Personal Computer AT 512KB Memory
Expansion Options in IBM 6150 and one in IBM 6151.
The IBM Personal Computer AT 512KB Memory Expansion
Note:
Option should only be used in conjunction with the IBM RT PC
Personal Computer AT Coprocessor Option.
Section 5. Memory Options 5-5