Writing MIPS code and the Mars Simulator

This version has a new editor which does syntax highlighting and allows multiple files to be open at the same time. It also fixes a bug in the display of character data that is on the stack. At the time of the last class, this version of Mars had two issues:

• the selection button to change display radix between decimal and hexadecimal, which previously (in the old version) used to only affect the memory dump area now also affects the display of numeric data in assembled code. This can be confusing until you get used to MIPS code and can readily convert hexadecimal number to decimal numbers.
  
• if you want to re-open a file when using Mars, it may not realize the file has changed, and will not refresh the data in the editor! You must first close the file, then reopen it.