IBM 7015-R30, Installation And Service Manual

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Reference Information
1-9
Memory Cards
There are four types of memory card available for use with the R30, R40 or R50 systems.
They are the MRX card, the RLX card, the NFX card, and the SF5 card.
The base MRX memory card looks like the following figure.
Base MRX Memory Card
1
.
.
.
4
Bank 0
Bank 0
Bank 1
Bank 1
5
.
.
.
8
Bank 0
Bank 0
Bank 1
Bank 1
Memory cards must be installed starting from memory slot A. Additional memory cards must
be installed using memory slot B first, then C then D.
The system can be upgraded by installing up to three additional memory cards.
Two kinds of memory modules can be installed on memory cards:
•
8MB memory modules which use 4Mb technology.
•
32MB memory modules which use 16Mb technology.
Each memory memory module looks like the following figure.
According to the type of memory modules installed, on the memory cards, the total memory
size is:
•
If it has eight 8MB memory modules, the memory card has 64MB memory.
•
If it has eight 32MB memory modules, the memory card has 256MB memory.