
PROTOCOL CONVERTER MODEL A/S-4
b.SI ($0F) character precedes the SNA line status report of each logical unit. This line status is handled as console data so the VDU CMD and device selection are not sent along with this message. The line status is reported as follows:
SOF | SC | 1 | 2 | 3 | 4 | EOF |
STX
0F
3
3
CR
LF
LU,
LU
CR
LF
ETX
Character Number: |
|
| ||
1. | 0 | ($30) | Physical Unit (PU) not active | |
| 1 | ($31) | PU active but inbound logical unit (LU) not active | |
| 3 | ($33) | Inbound LU active but no | |
| 7 | ($37) | Inbound LU active and in session with another LU | |
2. | 0 | ($30) | PU not active | |
| 1 | ($31) | PU active but outbound LU not active | |
| 3 | ($33 ) | Outbound LU active but no | |
| 7 | ($37) | Outbound LU active and in session with another LU | |
3. | DW | = | PU not active | |
| PU | = | PU active | |
| LU | = Inbound LU | ||
| LL | = Inbound LU in | ||
4. | DW | = | PU not active | |
| PU | = | PU active | |
| LU | = Outbound LU |
LL= Outbound LU in
5.Normal EBCDIC data received from the SNA host will be converted into ASCII before being transmitted to the VDU. Transparent Data received from the SNA host will be passed to the VDU with no conversions, except when the character is less than a hexadecimal value of $20. The character would then be preceded by DLE ($10) and the character itself would be made ASCII printable by setting it’s two most significant bits. This addition of the DLE and making the character printable is only done if this option is selected in the Application Options.
Example: Recvd - $1E = $10$DE - Xmitted
6.End of File (EOF) character is selected by
7.Device OFF is selected by
NOTE
Console data is not terminated by a VDU CMD or a Device OFF character.
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