DEC DECstation 5000 Model 200 Maintenance Manual page 184

In this display
Bsys refers to the system and memory modules. Entries
under the Bsys heading mean the following:
Entries for Optn# 0, Optn# 1, and Optn# 2 show
information about modules, if any, that are in the option
slots. The cnfg display provides no listing for empty option
slots. This display reports that a graphics module is in
option module slot 0. The Vid term in this display indicates
that this a color frame-buffer graphics module.
E–6 Console Commands Generated by Version PDE3 ROM Chips
Mem lists the amount of system memory.
RS232 is the system's communications protocol.
Optn# 5 is the SCSI controller on the system module.
Listings under Optn# 5 show any devices on this SCSI
controller's bus.
Optn# 6 is the ThinWire Ethernet on the system
module. The strings of numbers under Optn# 6 are the
ThinWire Ethernet station address.