Ciprico Rimfire 3880 Manuel D’Utilisation

Page de 230
21020285 D
User’s Guide
 Chapter 7   Board-control Commands
Page 7 - 6 
Start Command List (01H) 
Start Command 
List (01H)
With this command you can instruct the RF3880 adapter to begin operating 
from a Command List. Since with Command List operation you can attain 
higher performance from your SCSI peripheral, this is one of the first 
commands you should issue to the adapter. It must be issued by means of a 
Single Command Structure.
See Chapter 4, Command Operation for information about using Command 
Lists.
Command
Format
The Parameter Block Format for the Start Command List command looks like 
this:
Description of
Fields
Each of the fields used by the Start Command List command are explained in 
the following section:
Command Identifier
The Command Identifier field is used to identify the Status Block associated 
with a Parameter Block. It must be a unique value.
Adapter ID
This field must always contain the ID of FFH to indicate a Board-control 
command.
Address Modifier
This is the value that the adapter is to drive onto the VMEbus Address Modifier 
Lines when selecting the memory address of the Command List.
Command List Memory Address
This field contains the address of the Command List in Memory. It points to 
the beginning of the structure: Parameter Block IN index. 
Address 
Offset
Byte Memory Address
Offset + 0
Offset + 1
Offset + 2
Offset + 3
00H
Command Identifier
04H
Reserved
Addr Mod
Adapter ID = FFH
08H
Command List Memory Address
0CH
Reserved
Interrupt
10H
Command = 01H
Reserved
14H
Reserved
18H
Reserved
Table 60: Start Command List Parameter Block