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--- 20b:software-4banger [2008/08/27 14:01]
pauli created
+++ 20b:software-4banger [2008/08/27 14:01] (current)
pauli created
@@ Line 1: / Line 1: @@
+===== Software framework =====
+==== Description ====
+A simple framework that implements a simple programmable RPN calculator.
+The keyboard mapping is still based on a 20 key 4-banger I designed a while back.  The output is based on the 20b's screen.
+The framework is designed to be easily expanded to include extra functions.
+The current keyboard layout is shown below.  Some things are a bit non-intutive (GSB . is GOTO; GSB 0 is RTN) but this part of the code will need to be completely revised once a proper layout for the 20b has been designed.
+==== Download link ====
+[[http://hpwiki.fatcity.com/lib/exe/fetch.php?media=20b:sci.tgz]]
+==== Keymap ====
+Character to keyboard mapping:
+    enter   v       c       backspace
+       8       9       /                q = quit
+       5       6       *                t = trace mode
+       2       3       -                f = status
+       .       space   +                ^L = redraw screen
+Non-shifted keys
+    ENTER^  X<>Y    CHS     Clx
+       8       9       /
+       5       6       *
+       2       3       -
+       .       shift   +
+Shifted keys:
+    LASTx   Rv      EEX     CLREG/CLPRG
+    n!      sqrt    1/x     PGRM
+    ln      e^x     y^x     SST
+    STO     INTG    TEST    R/S
+    RCL     PI      shift   GSB

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