DVT Command
Purpose: | The device table (DVT) command sets up a table containing information |
| specific to a particular device, including the logical unit number. |
| One DVT command is required for each device connected to the same |
| interface card. These DVT commands must be entered immediately following |
| the IFT entry. |
Syntax: | DVT,[file],[Mmodel],LU:lu[,Eentry point][,TO:to] |
| [,BL:bb:ll:ul][,DT:dt][,TX:tx][,DX:dx] |
| [,DP:start #:a:b:c:d:e][,PR:pr][,QU:qu] |
| To enhance readability, it is suggested that continuation lines (usable in the |
| DVT command and NODE command) be used. Continuation lines are |
| indicated by a dash |
| normal DVT command string. Note that both the file and the model number |
| parameter, with a comma place holder, must occur in the line containing the |
| DVT command before the |
| continued on the next noncomment line in the command file. Note that an |
| extra comma is not required to start the new line. The DVT command may be |
| broken only where commas normally occur, never at colons. If continuation |
| lines are used, the DVT command using all the options would be as follows: |
| DVT,[file],[Mmodel #],– |
| LU:lu,– |
| [Eentry point],– |
| [TO:to],– |
| [BL:bb:ll:ul],– |
| [DT:dt],– |
| [TX:tx],– |
| [DX:dx],– |
| [DP:start #:a:b:c:d:e],– |
| [PR:pr],– |
| [QU:qu] |
file | specifies the file that contains the DVT parameter default values for a specific |
| device. It may be omitted if the default values are not needed. (This may be |
| the case if no device driver is to be used with a particular device. In that case |
| the interface driver will have to handle any I/O to the device.) If omitted, its |
| place must be held by a comma. |
| This parameter is usually the name of the file that contains the relocatable |
| driver code for this device, but it may be any userdefined file that contains only |
| the DVT parameter defaults. |
| Specifying the default file name here does not relocate the file as part of the |
| operating system. The driver required for the device operation must be |
| relocated during the system relocation phase of generation. |
Table Generation Phase 613