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PSION Link Protocol description | ||||
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RFSV Protocol description | ||||
This command requests information to a certain DEVICE. The name of the DEVICE is transferred with the command. The supplied information are the same, as described in the command FDEVICEREAD.
It is to be noted that; all values, which are more greater than 8 bits in reverse order will transfer. The LOW byte sent as the first over the line and only then follows the HIGH byte!
The commands STATUSDEVICE has always the same format. It is as a consequence built into the PLP:
| Header | PLP | RFSV-STATUSDEVICE | Foot | CRC | ||
|---|---|---|---|---|---|---|
| 16 10 02 | 32 03 02 01 | Command 20 00 |
Size 02 00 |
Devicename " C: " |
10 03 | 12 34 |
A valid response takes place with the command RFSV-RESPONSE and returns the delivery an error code.
| Header | PLP | RFSV RESPONSE | ... | ||
|---|---|---|---|---|---|
| 16 10 02 | 33 02 03 01 | Command 2a 00 |
Size 5a 00 |
Result 00 00 |
... ... |
| ... | Deviceinfo | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| ... ... |
Version 02 00 |
Type 02 00 |
changeable 00 00 |
Device size 00 00 00 00 |
Free space 00 00 00 00 |
Name "boot" |
Battery ff ff |
Reserve 16 *ff |
... ... |
| ... | Foot | CRC |
|---|---|---|
| ... ... |
10 03 | 12 34 |
| bold | Values represent fixed of values, which are used accurately in such a way! |
| italic | Values represent examples, which have a different meaning on the basis the command. |
The command STATUS DEVICE consists of 3 information units. These have the following meanings:
| Length in byte | possible values | Meaning | |
|---|---|---|---|
| Command | 2 byte | 00 20 (fixed) | The command identifier has always the same value! |
| Size | 2 byte | 00 02 (fixed) | Always two bytes will transfer. |
| DEVICE name | variable | variable | The DEVICE name is to be transferred, by which the information is required. |
The command STATUS DEVICE is answered with RESPONSE. This returns the delivery an error code and the information as result to the indicated DEVICE. If 00 00 is returned the delivery, then no error occurred.
| Length in byte | possible values | Meaning | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Command | 2 byte | 00 2a (fixed) | The command identifier has always the same value! | ||||||||||||||||||||||||||||||||||||
| Size | 2 byte | variable | Dependent on the number of transmitted information units | ||||||||||||||||||||||||||||||||||||
| Result | 2 byte | variable | The result can obtain the following values:
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| Version | 2 byte | 00 02 | At present only the version 2 is supported. | ||||||||||||||||||||||||||||||||||||
| Type | 2 byte | variable | Determines, which type the DEVICE is. The following types are possible:
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| changeable | 2 byte | variable | If the medium can be changed, then this value 00 01 (TRUE) has otherwise 00 00 (FALSE). This value becomes e.g.: with a floppy disk drive set. | ||||||||||||||||||||||||||||||||||||
| Device size | 4 byte | variable | The size of the complete DEVICE is indicated in bytes. | ||||||||||||||||||||||||||||||||||||
| Free space | 4 byte | variable | The number of the free storage space on DEVICES is indicated in bytes. | ||||||||||||||||||||||||||||||||||||
| Volume name | 16 byte | 0-terminated string | Here the volume name may be indicated. The name may be max. 15 byte long the last byte must be a 0-Byte. | ||||||||||||||||||||||||||||||||||||
| Battery status | 2 byte | variable | Gives the status to the battery of the DEVICE on (e.g.: with a buffered RAM) | ||||||||||||||||||||||||||||||||||||
| Reserve | 16 byte | 16 * ff | For extensions kept free workstation |
|
Michael Piepers homepage | ||||
|
BeOS Programs | ||||
|
PalmBeach | ||||
|
PSION Link Protocol description | ||||
|
RFSV Protocol description | ||||