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PJRC Store 8051 Dev Board, $79 LCD 20x2 Display, $11 Serial Cable, $5 12 Volt Power, $8 More Components... 8051 Tools Main Page Software PAULMON Monitor Download Code Manual Table of Contents Introduction Hardware Req. Software Req. Getting Started Standard Commands Extra Commands Built-In Functions Example Programs Tutorial Using Serial Port Program Headers Single-Step Run Using Flash ROM Intel-Hex Format Adding Commands Customizing PAULMON2Incomplete Common Problems Version 1 Development Board Code Library 89C2051 Programmer Other Resources

Common Problems And Solutions

Serial port lines (2 and 3) swapped

automatic baud rate detection got noise or bad character while board was on and terminal program was starting up.