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KN7AA CPU module (DEC 7000)
The LSB CPU module that uses the DECchip 21064 using CMOS-4 imple-
mentation with a super scalar super-pipelined design. An 8-Kbyte cache is
part of the CPU chip and a 4-Mbyte cache is implemented in RAMs. The
KN7AA processor supports writeback caching.
KDM70
XMI adapter for RA disks and TA tapes used to enable connection to
nodes on a DSSI bus.
KFMSA
XMI adapter for RF disks and TF tapes used in VAX 7000 systems. It en-
ables connection to nodes on a DSSI bus. Each KFMSA adapter supports
two DSSI buses.
KZMSA
XMI adapter to the SCSI (Small Computer System Interface) used in DEC
7000 systems. It enables connection to nodes on a SCSI bus.
ISE (integrated storage element)
All DSSI storage devices, such as RF disks and TF tapes, are ISEs.
LDC (local disk converter)
Converts 48 VDC to +5V and +12V needed by the storage arrays in the
DSSI PIU (BA654).
LEVI interface
The logical and physical interface of the CPU module to the LSB bus. Two
different chips are used. The LEVI interface also determines if data is in
the backup cache or if it must do a transaction to memory.
LFU (Loadable Firmware Update) Utility
Used to update firmware on LSB and I/O device modules.
LSB bus
The 128-bit system bus. The LSB bus is implemented in a 9-slot card cage
with its "backplane" in the center of the cage, so that modules are installed
from the front and the back. Module placement is indicated by a node num-
ber 0 through 8. Node 8 is reserved for the LSB I/O port (IOP) module.
Glossary-6
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