PokecomGO2 - CASIO Pocket computer simulator

This is a simulator of CASIO's Pocket Computer PB-100.
It reproduces the unique BASIC of the PB-100 generation.
(Omitting the closing parentheses of calculation formula,
using variables in the destination of GOTO, etc. ..)
You can input and output BASIC text file by load and save menu.
And sound data compatible with cassette I / F is analog output by SAVE command.

＜Supported BASIC instraction＞
PRINT
INPUT
GOTO
GOSUB-RETURN
FOR-TO-STEP-NEXT
IF-THEN/IF-;
VAC
CLEAR/CLEAR A
RUN
LIST
END
KEY
CSR
DEFM
MID
VAL
SIN/COS/TAN/ASN/ACS/ATN
LOG/LN/EXP/SQR
ABS
SGN
INT
FRAC
RND
RAN#
STOP
SAVE
ON GOTO / ON GOSUB
READ DATA RESTORE
STR$
KEY$
MID$
BEEP
LET

＜Setting menu＞
・cpu clock emulate
　Putting some wait of execution and realize the operation close
　to the actual machine.
・memory unit
　Setting whether extended memory exists or not.
　It only changes the remaining memory display.
・UI design
　When set to 'PB-100 compatible' it will be like PB-100.
　When set to 'PB-100 custom' the 'F'key and '↑','↓'key is enabled.
・viblation
　It vibrates when the key is pressed.
・debug
　It displays debug messages and a frame of software keys.

＜About Special Symbols＞
In the input/output file, PB special symbols are converted to escape characters.
Invalid except ASCII code.

\\ ¥
\LE(or <=) Less Equal
\NE(or <>) Not Equal
\GE(or >=) Greater Equal
\LA Left Arrow
\DA Down Arrow
\RA Right Arrow
\UA Up Arrow
\PI PI
\EX EXponent
\CI CIrcle
\SQ SQuare
\TR TRiangle
\CR CRoss
\DV DiVide
\DT DoT
\DG DeGree
\SP SPade
\HT HearT
\DI DIa
\CL CLover
\BX Box
\SG SiGma
\OM OMega
\MU MU

＜Other＞
Spaces between instructions and parameters can be omitted.
(ex.)
PRINT CSR1;"ABC"
SINA
etc.

If you press the '←' key after manual calculation,
the previous command will be displayed.
Step count calculation is not accurate. There are some errors with the actual machine.
Program trace execution is not implemented yet.
Moreover, the program can not resume after interruption. It will only be finished.