Category : Science and Education
Archive   : UCALC28.ZIP
Filename : HISTORY.DOC

Output of file : HISTORY.DOC contained in archive : UCALC28.ZIP
UCALC v2.8

Features added
o TSR (allows user to pop UCALC up at any time by pressing a key)
- Takes less than 6K of main memory (when using EMS or file)
- User can choose hot key
- " " " EMS, Main memory, or file
- User can paste the result when exiting
- TSR mode is optional. It's loaded by typing "UCALC /TSR"
- UCALC can be unloaded from memory
o Menu for graphing which supports the following by pressing a key:
- Tracing
- Zooming
- Area filling
- color changing
- grid/axis toggle
- dot/connect toggle
- monochrome toggle
- graph redraw
o Text can be added on the graphic screen at the cursor location
o PPLOT, or PLOT with no arguments recall previous equations for plotting
o Equations in the form y=f(x) can have a domain, ex: "PLOT 1/x, 1 to 5"
o DOS redirection can be turned off for faster screen output
o Built-in support for MCGA
o COLOR command to change text color

Commands which are new, or enhanced include: COLOR, GCOLOR, GRID, AXIS,

o More pages have been added to the help screen
o The commands in the help screen are in alphabetical order
o The PLOTDEMO file has been changed to reflect new graphing features
o The shareware version is the same as the registered version, except
for registration reminders.

Bug fix
o An error message is displayed when the incorrect number of parameters
is entered in built-in functions.
o Axis line markers are centered correctly when fractional numbers are
used in the WINDOW command.

UCALC v2.4 (8-16-94)

Features added
o Graphic plotting:
- Fast plotting
- CGA, EGA, Hercules, and VGA modes
- Cartesian, Polar, and Parametric graphs
- LINE, FILL, and RECTangle commands
- Data from another file can be plotted
- Support for up to 16 supper-imposed multi-color user graphs
- Smart crosshair (moves gradually faster as you hold arrow keys)
- Adjustable screen coordinate system
- Adjustable precision for graphs
o Ucalc now supports the factorial symbol (!).

o The syntax for several commands is more flexible. For instance
Also, the ".." used in SOLVE, SUM, etc.. can be replaced by " to ".
For instance SUM(x,1 to 10) is the same as SUM(x,1..10).
o The variable PI, and the functions SEC (secant), CSC (cosecant),
and COT (cotangent) are now built in.
o The function definition space has been greatly increased, so that
many more user functions can be defined. Each expression however
can use a maximum of 33 operators.
o Due to support for the factorial notation with the "!" symbol,
the "!=" symbol for "not equal" is no longer supported. "<>"
should be used instead.
o So that UCALC can start up a bit faster, UCALC.DEF has been removed.
Users can create their own UCALC.DEF file, or can modify, and rename
o Several extra features are now reserved for those who register.

Bug fixes
o Functions with multiple parameters can be a part of user functions
without giving an error message.

o UCALC /? no longer changes the screen color attribute.

UCALC v1.8 (9-14-93)

Features added
o Support for user functions with multiple parameters.
o Support for implicit multiplication.
o UCALC.DEF can contain any command.
o Variable 'last' contains the value of the previous expression
o Commands to change or remove the "ucalc> " and "Answer: " prompts
o PRINT, SHELL, LOAD, WRITE (save), CLOSE, EXIT (quick exit),
LISTF (list user functions) commands.

o FIX controls number of decimal digits rather than total digits.
o DIG command added to do what FIX used to do.
o Due to support for implicit multiplication, users should now
avoid giving a function the same name as a variable.
o All the features previously reserved only for registered users
are now available in the shareware evaluation copy.

Bug fixes
o F1 and CLS no longer change color screen attributes.
o Variables with embedded numeral digits no longer confuse the parser.
o UCALC.DEF in a different directory no longer causes a problem.

UCALC v1.2 (10-25-92)

This was the first public release.

  3 Responses to “Category : Science and Education
Archive   : UCALC28.ZIP
Filename : HISTORY.DOC

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: