IBM Memory Expansion Boards
IBM 64KB Memory Expansion Option #1
- Placed in IBM PC 5150 rev. A #2
- IBM Part Number: 1806823 XM
- Manufactured Date: 44/81 (last IC)
IBM 64KB Memory Expansion Option #2
- Placed in IBM PC 5150 rev. A #1
- IBM Part Number: 1806823 036 XM
- Manufactured Date: 5281 (last IC)
IBM 64KB Memory Expansion Option #3
- Not Placed
- IBM Part Number: 1806823 XM
- Manufactured Date: 05/82
IBM 64/256KB Memory Expansion Option #1
- Not Placed
- IBM Part Number: 1803816 XM
- Manufactured Date: 29/82
IBM 64/256KB Memory Expansion Option #2
- Not placed
- IBM Part Number: 6449021 XM
- Manufactured Date: 4/84
- Now full 256kb RAM installed
IBM 64/256KB Memory Expansion Option #3
- Placed in IBM PC XT 64-256k
- IBM Part Number: 1501989 XM
- Manufactured Date: 31/83
IBM 64/256KB Memory Expansion Option #4
- Not placed
- IBM Part Number: 1501989 XM
- Manufactured Date: 1983
IBM 128KB Memory Expansion Option
- Placed in
IBM PC AT Model 099
- IBM Part Number: 1503087
- Manufactured Date: 40/85
IBM 512KB Memory Expansion Option
- Placed in IBM PC AT Model 099
- IBM Part Number: 1501516
- Manufactured Date: 07/84 (PCB) April 11, 1985
IBM 128KB/640KB Memory Expansion Option
- Placed in
IBM PC AT Model 319/339
- IBM Part Number: 62X0780
- Manufactured Date: 51/86
IBM 512KB/2MB Memory Expansion Option
- Placed in IBM PC 5162
- IBM Part Number: 6450343
- Manufactured Date: 45/88
IBM 256KB Memory Expansion Option
- Placed in IBM Portable PC 5155
- IBM Part Number: 6407740
- Manufactured Date: 24/84
Microsoft PC RAMCARD
Box of 41128 DRAM chips for IBM PC AT model 099
- Not placed
- Kit od memory DRAM modules for IBM PC AT model 099