December 5, 1997
The I/O port still has not been implimented. The 0x200000 access to the external ROM was successfully disabled as far as we know, but the calculator that was modified to accept the I/O is no longer accepting data through it's link. We cannot install Fargo onto this calculator to either check for sure if the 0x200000 is disabled or if the I/O port that was built actually works. The calculator is also very unstable (crashes every 1-10 minutes) with the modifications, and we strongly believe that it is because of the use of magnet wire (leading to interference along the bus and addressing). The next modification will have much shorter lengths of magnet wire. Another possibility is that the AND gate is getting a low signal from interference when it is disconnected from it's input. This will be looked into this weekend before modifying a second calculator.
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