For Model D25 and 9404-Exx and 9404-Fxx Models:
This 8MB feature card attaches to the #3120: 8MB Main Storage card.
One #3121 may attach to each #3120.
A maximum of two are supported on these models.
Card slots required: None.
For Model 300:
The following main storage cards are used with the #2040: Model 300 4.2 RPR 8MB Processor. Each of the six main storage cards may be used with each other.
#3120: 8MB Main Storage
#3121: 8MB Main Storage Expansion
#3122: 32MB Main Storage
#4120: 8MB Main Storage
#4121: 8MB Main Storage Expansion
#4122: 32MB Main Storage
#3121/#4121 attaches to a #3120 or #4120: 8MB Main Storage card.
One #3121/#4121 may attach to each #3120/#4120.
Supported on the following systems:
