HP-25 Emulator in Javascript:


Before starting:

  • This is an RPN calculator.
  • Shift Keys:
    • Function above key: Yellow [f] key
    • Function below key: Blue [g] key
  • The original calculator displays only the "X" register, this emulator opens by showing the entire stack.  Press [f][RCL (Show Stk)] to toggle Y-Z-T display on and off.
  • Information: [i] key


Programming has not been implemented.

 T  Z  Y
FIX SCI ENG
X S Show Stk SUM-
% 1/x CL:SUM
CL: PREFIX PGM REG STK
  DEG RAD GRD
x<y ln log ->R
x<0 ex 10x ->P
x>y sin cos tan
x>0 sin-1 cos-1 tan-1
x#y INT X½ YX
x#0 FRAC ABS
x=y ->H.MS LASTx PAUSE
x=0 ->H PI NOP
JavaScript HP 25 Emulator r0.8.5

HP-25 Emulator

In Progress


On the web