serial port question.

Hello.

I am working on a project in c++ that uses the serial port.
I have read "The Serial Programming Guide for POSIX Operating System"
http://www.easysw.com/~mike/serial/serial.html
And I was successfully able to send and recieve an unsigned character
array of 255 chars. (from 00 to FF) However, I was only able to do so
by sending and receiving one byte at a time. I have been unable to
accurately send and receive more then 6 - 7 bytes at one time, although
my software requirements state that they would like me to be able to
receieve up to 512 unsigned chars at one time. Has anyone been able to
do this with any degree of accuracy? Or is this a limitation on the
serial port?

Thanks.

Chris.

.

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