Some things to try with the serial port: You can create a text document of commands and send them to the transceiver via procomm (DOS) or Hyperterm (WIN9x). A good reason to do this is to load the memory from a text file. Here are some sample lines from a frequency.txt file I created:

This loads memory locations 1-8 plus the power-up VFOA and VFOB. The memory map for the uP board is as follows:

• 1-99 Memory locations 1-99
• 100-107 Switch memory locations 1-8
• 108 Power-Up VFOA
• 109 Power-Up VFOB
• 110 1.5 mHz default value, this is the frequency that is selected with the 1.5 band switch
• 111 3.5 mHz default value, this is the frequency that is selected with the 3.5 band switch
• 112 7.0 mHz default value, this is the frequency that is selected with the 7.0 band switch
• 113 10 mHz default value, this is the frequency that is selected with the 10 band switch
• 114 14 mHz default value, this is the frequency that is selected with the 14 band switch
• 115 18 mHz default value, this is the frequency that is selected with the 18 band switch
• 116 21 mHz default value, this is the frequency that is selected with the 21 band switch
• 117 24.5 mHz default value, this is the frequency that is selected with the 24.5 band switch
• 119 28 mHz default value, this is the frequency that is selected with the 28 band switch
• 120 29 mHz default value, this is the frequency that is selected with the 29 band switch