6100 BSC Programming Manual

Writing Applications that Use 6100 BSC
-----------------------------------------------------------------
| |
| |
| Local Station Remote Station |
| |
| \ |
| / ENQ ---------> | READ |
| WRITE | | request |
| request | <---------- ACK 0 | |
| | | |
| | msg ---------> | |
| | / |
| | <---------- ACK 1 \ |
| \ | READ |
| / | request |
| WRITE | msg ---------> | |
| request | / |
| | <---------- ACK 0 \ |
| \ | READ |
| WRITE . . requests |
| requests . . |
| . . |
| / |
| WRITE | msg ---------> / |
| request | \ |
| | <---------- ACK n | READ |
| \ | request |
| |
| |
| The underscore shows the information applications |
| supply and receive. In each case, the information |
| resides in the text field of the request/response |
| buffer (see Figure 3-9). Items not underscored--for |
| example, most control sequences--are supplied and |
| received by the protocol, not by the application. |
| |
| |
| |
-----------------------------------------------------------------
Figure 3-5. Data Transfer
3-13