Functional Description; Component Functions - Honeywell 6000 Series Reference Manual

SECTION II
FUNC TIONAL DESC RIPTION
COMPONENT FUNC TIONS
shown in Figures 2 --1 through 2 -4.
The abbreviations used are:
ADE -— Additional Drive Electronics
CCA or CA -— Control Adapter
DCA -— Disk Control Adapter
DCX — Dual Control Crossbar (includes associated cables and
additional EDE electronics)
DSC ~— Disk Storage Control (refers to the complete control)
DSS —- Disk Storage Subsystem
DSU —- Disk Storage Unit (refers to the DSU190 and DSU190B
Disk Storage Units unless noted otherwise)
EDAC - Error Detection and Correction
EDE ~— Extended Drive Electronics
EUS -— External User System (refers to any Series 6000 Central
System or DATANET 355 Front—End Network Processor)
IDCW — Instruction Data Control Word
LA -— Link Adapter
OPI «— Operational In (a status line from the device to the controller
indicating the operational status of the device)
2-1 DB3?