83Plus:OS:OS 2.53MP Changes

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Revision as of 15:40, 15 February 2010 by Dr. D'nar (Talk | contribs)

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2.53 has been released officially. Merger with 83Plus:OS:VersionDifferences will happen when it happens.

To disable MathPrint: Press MODE, up, and select CLASSIC, not MATHPRINT.

Added Features

  • MathPrint is TI's own pretty printing. All the cool companies are using CamelCaps!
  • New menu Alpha+F1-F4 for use with MathPrint. All these new tokens have been moved to logical menu, except the fraction-related tokens. These are not in the symbol section of the Catalog.
  • In MathPrint, press up to scroll through previous entries, which allows basic copy and paste.
  • The WINDOW screen now has an option for setting ?X, but not ?Y. The ability to store directly to the ?X and ?Y tokens has always existed.
  • The TABLE screen now has a shortcut for setting ?Tbl, because going the the TBLSET menu is hard.
  • New ZOptions under ZOOM
  • Catalog help updated. Exactly what has changed remains a mystery, as the new tokens haven't been added.

New Tokens

  • AUTO Answer -- basic [EF 3B]
  • CLASSIC -- basic [EF 38]
  • DEC Answer -- basic [EF 3C]
  •  ?F??D -- swap between fraction and decimal [EF 31]
  • FRAC Answer -- basic [EF 3D]
  • logBASE( -- log to any base, logBASE(x,base [EF 34]
  • MATHPRINT -- basic [EF 37]
  • n/d - normal fraction, numerator n/d denominator [EF 2E]
  •  ?n/d??Un/d -- swap between improper and proper fractions in MathPrint [EF 30]
  • randIntNoRep( -- gives a list of random integers, with dimension high-low+1 randIntNoRep(low,high [EF 35]
  • remainder( -- essentially modulo, x % y, remainder(x,y [EF 32]
  • summation  ?( --  ?(expression,variable,start,end [EF 33]
  • Un/d -- mixed number, whole Un/d numerator n/d denominator [EF 2F]
  • ZFrac1/2, -- delta-x,y = 1/2, graph centered [EF 18]
  • ZFrac1/3, -- delta-x,y = 1/3, graph centered [EF 19]
  • ZFrac1/4, -- delta-x,y = 1/4, graph centered [EF 1A]
  • ZFrac1/5, -- delta-x,y = 1/5, graph centered [EF 1B]
  • ZFrac1/8, -- delta-x,y = 1/8, graph centered [EF 1C]
  • ZFrac1/10, -- delta-x,y = 1/10, graph centered [EF 1D]
  • ZQuadrant1, [EF 17]
  • fraction related tokens
    • _, EF2F, not the same as printing _. New font codepoint 0F5h.
    • /, EF2E, not the same as division /. New font codepoint 0F6h.
  • box, EF1E. New font codepoint 0F7h.


  • 5, (iy+44h) controls MathPrint. You should clear the screen if you change this flag.
  • 0, (iy+48h) controls the fraction mode
  • bits 1 and 4 of (iy+47h) are related to when the OS decides to format an answer as a fraction
  • 4, (iy+45h): set this to disable the message about shortcut menus from Press-to-Test. Not affected by Reset Defaults, though MathPrint is.


96 new bcalls added.

  • 5410h -- alpha menu reminder pop up


  • RAM page 3, 977Eh–9A7Dh -- previous entries. Destroying this causes crashes.
  • RAM page 3, 9A7Eh–9D7Dh -- homescreen graph buffer. Zero after destroying to prevent flicker.

Compatibility Issues

  • Programs using the homescreen may be very broken graphically. This includes applicaions that do strange things on the homescreen. Users should disable MathPrint before running them, and programs should definitely clear the screen first thing. Whether or not this is sufficient to ensure normal operation or if disabling MathPrint too is required requires further investigation; it appears that just clearing the screen is enough for now.
  • Programs that encounter an error on the graphscreen may end up with the graphscreen contents in the homescreen buffer
  • In Omnicalc, parenthesis assistant does not work properly. (Display error)
  • In Omnicalc's entries menu: Using the entries menu without MathPrint symbols has some display issues, and when selecting an entry, it crashes.
  • In Omnicalc's entries menu: With MathPrint symbols in the entries log, there are serious display issues accompanied with a dramatic crash.
  • Omnicalc's partial line clearing (always enabled) crashes or glitches when you try to use it in MathPrint.
  • All custom fonts of Omnicalc will need to be updated with the new font codepoints or else MathPrint will not look right.
  • Calcutil will not run at all correctly and will crash your calculator when you turn it off and back on.
  • ld a,1 \ ld (appInfo+2),a \ bcall($50CB) no longer unlocks the flash ROM.

Performance Issues

  • Disp and Output may be up to 4× slower than on previous OS version when MathPrint is enabled (see TI-84+ OS v2.53 Leaked)
  • When MathPrint is enabled, when you go to the "Y=" menu to type a function, it's displaying slowly the Y1, Y2, Y3, Y4 etc.


This is for bugs or strange functionality. Note the above "Compatibility Issues" section; use that for issues with third-party software.

  • MathPrint Bug: When a list is displayed as a result, you can't take it back for you new entry: selecting it and pressing enter doesn't work
  • MathPrint can't handle overly complex expressions; specifically, nesting multiple levels of fractions and the pretty printed FUNC symbols will eventually cause the calculator to refuse to let you nest any further. In practice, this limit may rarely, if ever, be encountered in the classroom. If your expression is starting to require vertical scrolling, expect to encounter the old out-of-memory checkered box soon. Try to recall this expression and it won't get fully MathPrintified.