vintage-pc-collection

IBM PC 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

Microsoft PC RAMCARD

Not Placed
Manufactured Date: early 1982

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

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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 256KB Memory Expansion Option

Placed in IBM Portable PC 5155
IBM Part Number: 6407740
Manufactured Date: 24/84

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

Box of 41128 DRAM chips for IBM PC AT model 099

Not placed
Kit of memory DRAM modules for IBM PC AT model 099
Manufactured Date: 49/85

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