How does one handle Stock agencies that only allow 64 characters for keyword lists

Question

since LR4 puts the keywords in alphabetical order the keywords would be truncated and my most popular keywords would not make it to agencies search engines. Anybody know of a way to put the most powerfull keywords up the front. Or do I need to edit keywords specifically for this agency thus doubling my work.

Answer 1

The Enet-485 contains several levels of buffers which impact how flow control works. When you write data from the PC the data buffer is transmitted to the Enet-485 where it is stored to be transmitted out of the desired port. In addition to deep software buffers, the Enet-485 also has a deep (128 byte) hardware FIFO that lays just above the physical (RS-485) layer.
This FIFO is "RTS/CTS" sensitive and can react (ie: "turn off") very quickly in response to RTS/CTS handshaking. However the software flow control (XON/XOFF) is handled by the Enet-485 firmware. Thus if the TX FIFO has more then 5 bytes and an XOFF is received, it is not possible to turn off the serial stream until the FIFO is empty, which causes a data overrun.
The reason why wait
ing between bytes works (but is slow) is that at any time an XOFF character is received, the FIFO will contain less than 5 bytes and thus not overflow.
However, if you know the size of the receive buffer, then is it possible to send data in lagre (40k) chunks with a slight pause between to allow for the XOFF to be received and processed? You can guesstimate the timing based on the baudrate, buffer size, and network delay (typically ~100ms but can be more).