Arduino on an ISA card HD

This was a quick test of my homemade wire wrapped ISA adapter. The adapter was wire wrapped instead of soldered due to the cost ($20) of the ISA prototype boards. The adapter was set to occupy addresses 0x200h through 0x207h. The Arduino is a Pro Mini that has been soldered to a 24-pin wire wrap socket, nothing fancy. The Arduino is monitoring pin 15 of a 74LS138 that will be used as the read-enable for the first address, 0x200h in this case. The Arduino is simply counting pulses on the line, increasing the count on the falling edge and flashing an LED to indicate the count. In the video, I am simply using symdeb from DOS and reading from port 0x200h. This causes the output of the 74LS138 to toggle once. This adapter is eventually destined for a Motorola Coldfire 5206 single-board computer. The adapter will contain an IDE controller, an MP3 decoder, and a micro-controller tied to a UART that will read from a PS/2 keyboard and generate a VGA video signal. Currently the computer lacks video output and input must be done over RS232 or Network, thus requiring a separate PC or dumb terminal.