Radius PowerView Commands

Radius Powerview: SCSI Command Set

SCOPE

This document applies to the following hardware devices:

• Radius Powerview (Model 825-0496-03 A)

and to the following firmware revisions:

• TBD

All numbers are expressed in hexadecimal, unless otherwise noted.

COMMAND SET SUMMARY

The following is a list of the observed SCSI commands:

• 03 Request Sense
• 08 Read
• 09 Retrieve Statistics
• 0a Write
• 0c Set Interface Mode / Set MAC Address
• 0d Unknown startup command
• 0e Enable/disable Interface
• 12 Inquiry

A number of other SCSI commands are implemented, but their usage is not yet fully known.

Unknown Startup Command (0d)

Command: 0d 00 00 00 06 00

Function: Unknown at this time

Type: Input (Transitions to DATAOUT)

Host then sends: 00 09 00 07 FF FF FF 00 (The last 00 might not actually be there?)

Note: The AppleTalk broadcast address is 09:00:07:ff:ff:ff.

This is probably configuring the Multicast Address Registers of the DP83902A Ethernet receiver inside the DaynaPort SCSI Link

10.9 MULTICAST ADDRESS REGISTERS (MAR0 –MAR7)

The multicast address registers provide filtering of multicast 
addresses hashed by the CRC logic. All destination addresses 
are fed through the CRC logic and as the last bit of the 
destination address enters the CRC, the 6 most significant bits 
of the CRC generator are latched. These 6 bits are then decoded 
by a 1 of 64 decode to index a unique filter bit (FB0 –63) in 
the multicast address registers. If the filter bit selected is 
set, the multicast packet is accepted. The system designer 
would use a program to determine which filter bits to set in 
the multicast registers. All multicast filter bits that 
correspond to multicast address accepted by the node are then 
set to one. To accept all multicast packets all of the 
registers are set to all ones.

Enable/disable Interface (0e)

Command: 0e 00 00 00 00 XX (XX = 80 or 00)

Function: Enable (80) / disable (00) Ethernet interface

Type: No data transferred

Notes: After issuing an Enable, the initiator should avoid sending any subsequent commands to the device for approximately 0.5 seconds

Inquiry (12)

Command: 12 00 00 00 LL 00 (LL is data length)

Function: Perform a standard SCSI Inquiry command: reference the SCSI spec for further information

Type: Input; reference the SCSI spec for the data returned