Generally, you uses the "OPEN" comand to set transfer speed but in this case, you can be set up to 9600 bps.
But if you tweak "SIO Parameter Work" directly, you can set to 19200 bps.
Try execute following command.
Details of &BFD33
| bit7 | bit6,5,4 | bit3,2 | bit1 | bit0 | ||||
|---|---|---|---|---|---|---|---|---|
| Speed | Parity | Char length | Stop bit | |||||
| 0 | 000 | --- | 00 | Even | 0 | 8 bit | 0 | 1 bit |
| 001 | 300bps | 01 | Odd | 1 | 7 bit | 1 | 2 bit | |
| 010 | 600bps | 10 | none | |||||
| 011 | 1200bps | 11 | none | |||||
| 100 | 2400bps | |||||||
| 101 | 4800bps | |||||||
| 110 | 9600bps | |||||||
| 111 | 19200bps | |||||||