I am using 89c51RC2b ,i tried programming using isp i tried Null modem Connectio (TXD-RXD-GND) as well as circuit shown in flash ,agic manual using 74ls125 bit i could not be able to porogram it is giving error of Communication sating that Try to reduce or increase baud rate.
what may be the problem.
help me.
See my reply to your first posting.