Hi Wallace,

it sounds strange. I have always the opposite problem, the PC was to slow.
Why you not improve your 8051 receive routine to use the interrupt ?
So I lost never a byte up to 115200 baud at 11MHz crystal.

Or use a simple byte per byte protocol. Any byte, sent by one, must be acknowledged by the other.


Have anybody a solution for the opposite problem ?
I use W98 and a self written program in a DOS box.
I use the interrupt and enable the FIFO.
This works fine on my desktop (100MHz). But on my notebook (333MHz) I lost still a character from time to time. Also at very low baudrates (1200 baud).
It seems, a mystery Windows routine catch the UART and steal a byte.

Any suggestions ?


Peter