SX 52 based bike logger with PC RAM SIMM
It includes RS232 send and get routines that let a PC communicate with the board. A few tests are built in - from a PC, you can send a character to the board to ask it to push a value to RAM, or send another character to pop from RAM and return the value to the PC. This way, you can push a few dozen characters, then pop them back to show the RAM is working. There also is RS232 code built in to run a Seetron LCD display. DRAM refresh is managed by the same ISR that runs the RS232 routines.
   SX 52 based bike logger with PC RAM SIMM
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