read more than 255 bytes

according to johnwasser's code,i have implemented code for serial data to dmd display but on display only 255 character coming.

i have send 300 character through serial monitor,it receive 300 character but on displayed only 255 characters.
i have use spi so i think, input serial buffer is 1 byte.

now my question is how can i declare 2 byte array ,
for high byte and low byte and how to displayed these characters on dmd p10 module.

please send the code

lectrotek:
i have send 300 character through serial monitor,it receive 300 character but on displayed only 255 characters.

please send the code

You post YOUR code so we can see what you have done.

If you are only showing 255 characters it makes me wonder how you are counting them for the display to output - maybe you are using a byte when you should have been counting with an int

...R