THE GRASS CALCULATOR›         --------------------››        by RON FETZER of OHAUG›› If you bought a commercial calculator› with all these features it could cost› you a considerable amount  of  money.› This is a great calculator. If you do› Assembly  Language  programming  this› calculator is a must. It does Hex  to› Deci and Deci to Hex conversions.›› It  was  called  the GRASS CALCULATOR› because it was developed by the Grand› Rapids    Atari   System   Supporters› (GRASS). The program was  written  by› GARY  HEITZ  and  TIM  FEENSTRA.  The› '^Hex'  function  did  not  work.   I› corrected  it.  I also clarified some› of the prompts on the screen.›› This is a 10  digit  calculator  with› Hex  to  Deci.  and   Deci   to   Hex› function.  In  addition  the   memory› contents   are   displayed   on   the› calculator   unlike   a    commercial› calculator.  With  the   ability   to› display    numbers    in   SCIENTIFIC› NOTATION you can get answers that can› be 20 digit long or even longer.›› SCIENTIFIC  NOTATION.  In this format› only   the   SIGNIFICANT  digits  are› displayed. The number  of  places  to› move  the  decimal point is indicated› by  a  number  with  a  +  sign.  For› example:››           CALCULATOR SHOWS:››             2.334512 +12›› This means  that  the  decimal  point› must  be moved 12 places to the RIGHT› from its present position. The  empty› spaces get filled in with 0. Thus the› number woud be:››            2 334512000000.›             .----------->.››  2,334,512,000,000(2 trillion etc.)›› FEATURES OF  THE  CALCULATOR.  Repeat› the  keystrokes  as  shown   in   the› examples.  ^R  means hold the CONTROL› KEY and press R.››› ADDITION: 25 + 25 = ANS(50)›› SUBTRACTION: 50 - 30 = ANS(20)›› MULTIPLICATION: 25 X 4 = ANS(100)›› DIVISION: 50 / 10 = ANS(5)›› PERCENT: 90 X 6 % = ANS(5.4)›› SQUARE ROOT: 64 ^R = ANS(8)›› SQUARE OF A NUMBER: 7 ^S = ANS(49)›› HEX TO DECI.: $FF ^D = ANS(255)›› DECI TO HEX: 1000 ^H ^H =  ANS($3E8).› (Press ^H TWICE!)›› CHANGE  SIGNS:  T  (TOGGLES) FROM +/-›  AND -/+›› GET 2 DECIMAL PALCES: # 2.345 + 3.569› =  5.92  (ROUNDED  OFF   TO   NEAREST› HUNDREDTH)›› PUT A NUMBER INTO MEMORY: 100 ^+›› SUBTRACT  A  NUMBER OUT OF MEMORY: 25› ^-›› FROM MEMORY TO MAIN DISPLAY: ^M›› CLEAR MEMORY: ^C›› CLEAR A CURRENT ENTRY: Z›› CLEAR ALL (EXCEPT MEMORY):  CLEAR  or› RETURN›› PRINT: P(TOGGLES ON/OFF) Printer›› QUIT PROGRAM: ^Q››› When  a  HEX  number  is put into the› memory   it   will  automatically  be› converted to a decimal  number.  (All› HEX  numbers  must  be  preceeded  by› '$').›› If  you want to disable the BREAK KEY› remove the REM in line 1910.›› You can renumber this program  (TURBO› BASIC)  to  higher  numbers  such  as› starting  with 30000 and attach it to› another program. To do  this  do  the› following:›› 1) Renumber the program› 2) SAVE it with LIST. Example: LIST› "D:GRASSCAL.LIS"› 3) Type in NEW›› 4) LOAD your original program into› the computer.› 5)  LOAD your listed program with the› ENTER     command.      Example:ENTER› "D:GRASSCAL.LIS"› 6) Save your newly created program.›› You  now have attached the calculator› program to your original program. You› can  call the claculator program with› a  GOTO  30000.  To  return  to  your› original program change line  490  in› the  calculator  program   from   490› .....:END  to  490  ....:GOTO 10. Now› every time  you  press  ^Q(Quit)  you› will be going to the begining of your› original program.›› MAKING A MASTER DISK: Format  a  disk› in  single  density. If you use TURBO› BASIC your calculator will be faster.› The new TURBO BASIC shows a prompt of› TURBO. The  old  shows  a  prompt  of› READY.  PUT  DOS  on  your disk. Copy› TURBO BASIC(AUTORUN.SYS) to the disk.› From  the Newsletter copy the program› GRASSCAL.ARB to  your  disk.  If  you› have  the new TURBO BASIC on the disk› the program will be self booting. The› calculator  program  will  run   also› without TURBO BASIC.›› You can order a complete master disk.› It is $4.00 including shipping. Order› from Ron Fetzer. See address below.›› OL'  HACKERS  A.U.G.  INC.,   C/O RON› FETZER, 22 MONACO  AVE.,  ELMONT,  NY› 11003, U.S.A.›› >>>>>>>>>>>>>>>END<<<<<<<<<<<<<<<<<<<›››