Glossary-7
LFU (Loadable Firmware Update) Utility
Used to update firmware in EEPROM on modules. Firmware can include the
SRM console, AlphaBIOS, and firmware on TLSB and I/O device modules.
Mailbox
A software-created data structure in memory used to read and write to I/O device
registers on XMI and FBUS+ controllers.
Memory
Systems use the MS7CC memory, available with 128, 256, and 512 Mbytes and 1,
2, and 4 Gbytes of memory. The AlphaServer 8400 supports up to 28 Gbytes of
memory, and the 8200 supports up to 12 Gbytes of memory.
M
EMORY
C
HANNEL
A bus that, under the OpenVMS and DIGITAL UNIX operating systems, permits
data written to one computer’s memory to be shared by other computers on the
bus.
Memory interleaving
Method to optimize memory access time; the SRM console program automatically
interleaves the memories in the system unless a command is used to set a specific
interleave or no interleave (which would result in serial access to each memory
module). Interleaving allows a number of memories to operate in parallel.
More protocol
A protocol used on the XMI bus that allows XMI nodes to make noninterlocked
memory reads and writes. Using the More protocol increases I/O performance.
Node, TLSB
AlphaServer 8400 TLSB nodes are numbered from 0 to 8 and correspond to
specific slots in the TLSB card cage. The AlphaServer 8200 TLSB has five nodes
or slots, numbered from 4 to 8.
NVRAM option
PCI controller containing nonvolatile memory that supports Prestoserve
applications running under DIGITAL UNIX.
OpenVMS operating system
The OpenVMS operating system is a general-purpose multi-user operating system
that supports industry standards and runs on Alpha machines.
PCI (Peripheral Component Interconnect) shelf
The unit containing the PCI adapter module, PCI card cage, and power.
Physical address space
The 1 terabyte of physical address space that the TLSB bus can access using a 40-
bit memory address space.
