Is it possible to expand the Handy Board\\s memory to 64K?
This is tricky, because the HB\\\’s peripherals (motor outputs, sensorinputs, and expansion interface) are mapped across a full 16K of the lower 32K of memory (see the H\\\’s memorymap). But, the guys working on simpleRealTimeJava for the 68HC11 have come up with a clever design that alternately maps an additional 32K or the peripherals into the lower half of RAM. The instructions for modifying your Handy Board to have the extra 32K of RAM are available at http://www.rtjcom.com/6811/hb64.html. Please note that Interactive C will not support the extra 32K. You\\\’ll have to program your HB in the SimpleRTJ or assembly language to take advantage of the extra RAM installed with this method. Interactive C will continue to work properly on a modified board, however, using the stock 32K memory. Below is older information about why it\\\’s hard to dothe full-blown modification. I guess it\\\’s not so hard if you think about it right :-). The SimpleRTJ solution is agreat hack for improving the
