# What’s Different between TI-83 and TI-84?

Copyright © 2006–2015 by Stan Brown, Oak Road Systems

Copyright © 2006–2015 by Stan Brown, Oak Road Systems

**Summary:**
The TI-83 and TI-84 are **nearly keystroke compatible**, but the
84 has **a few new functions** that the 83 lacks. This page lists
them.

**TI-84Upgrade:**
In early 2010, TI released the
2.53MP operating system for TI-84s, with MathPrint and some other
features. More features wre added in version
2.55MP, about a year later. See
83Plus:OS:OS 2.53MP Changes,
and “new in
2.55MP” many places in this note. If you have a TI-84 Plus C (in
color), you already have the latest OS. WIth other TI-84s, press
[

`2nd`

`+`

`MEM`

] [`1`

] and check your firmware version. If
it’s less than 2.55MP, it’s worth your while to
upgrade the OS
to get the new features.Both the TI-84 Plus and the TI-84 Silver now come with these features:

- new in 2.55MP: With Mathprint, fractions and many equations now show up in a more naturalistic way.
- new in 2.55MP: Answers can be displayed always as fractions, always as decimals, or in “Auto”, where the calculator tries to match the form of the input.
- new in 2.55MP: Fractions greater than 1 can be displayed in mixed form: 15/2 or 7_1/2.
- Results screens now have a title in reverse video. This
can’t be controlled by [
`MODE`

], as far as I know. - Screens written by programs now display
`DONE`and then a blank line when the program exits, so effectively programs are now limited to six-line output. I don’t know of any fix for this annoying change.

You can control these features (except as indicated) by
pressing [`MODE`

] [`▲`

].

The keyboards are identical in labeling, but the 84’s design is curved, and all keys except the numeric keypad are smaller.

new in 2.55MP: On the home screen, you can just press
[`▲`

] repeatedly to recall past calculations. When
you find the one you want, press [`ENTER`

] it’s pasted to
the screen where you can edit it if you wish before pressing
[`ENTER`

] again to execute it. ([`2nd`

`ENTER`

*makes* `ENTRY`

] still
works.

The 84 has a clock, which you can view or set by pressing
[`MODE`

].

new in 2.55MP: Four new “shortcut menus” claim to offer
faster access to existing functions; press [`ALPHA`

`F1`

*makes* `FRAC`

],
[`ALPHA`

`F2`

*makes* `FUNC`

], [`ALPHA`

`F3`

*makes* `MTRX`

], [`ALPHA`

`F4`

*makes* `YVAR`

].
Of these, [`ALPHA`

`F3`

*makes* `MTRX`

] really does seem to make it easier to enter
matrices.

There are a few goodies for statistics students:

- new in 2.55MP: Stat Wizards prompt you for arguments to the
statistical functions in the [
`STAT`

]`CALC`

menu, the [`2nd`

`VARS`

*makes*`DISTR`

] menu, and possibly others I haven’t noticed. You can turn the wizards on or off by pressing [`MODE`

] [`▲`

] [`▲`

]. On the [

`STAT`

]`CALC`

menu, there’s a new item`D:Manual-Fit`

.On the [

`STAT`

]`TESTS`

menu, there are two new entries:`D:χ²GOF-Test`

and`G:LinRegTInt`

. The 83 screen is shown at left and the 84 screen at right:However,

`χ²GOF-Test`

makes you compute the expected values on your own, so it’s not as useful as it could be. (See MATH200A Program part 6 for a downloadable program that does the whole job.)On the [

`2nd`

`VARS`

*makes*`DISTR`

] menu, there’s a new entry,`4:InvT`

, for finding inverse Student’s t. The 83’s selections 4–E become 5–F on the 84. TC3's MATH200 students care only about`binompdf`

, which is [`2nd`

`VARS`

*makes*`DISTR`

] [`0`

] on the 83 and [`2nd`

`VARS`

*makes*`DISTR`

] [`ALPHA`

`MATH`

*makes*`A`

] on the 84, and`binomcdf`

, which is [`2nd`

`VARS`

*makes*`DISTR`

] [`ALPHA`

`MATH`

*makes*`A`

] on the 83, [`2nd`

`VARS`

*makes*`DISTR`

] [`ALPHA`

`APPS`

*makes*`B`

] on the 84.

The following catalog functions are in the 84 but not the 83:

`χ²GOF-Test`

`checkTmr`

`ClockOff`

and`ClockOn`

`dayOfWk`

`ExecLib`

`getDate`

,`getDtFmt`

,`getDtStr`

,`getTime`

,`getTmFmt`

,`getTmStr`

`invT`

`isClockOn`

`LinRegTInt`

`Manual-Fit`

`OpenLib`

`setDate`

,`setDtFmt`

,`setTime`

,`setTmFmt`

`startTmr`

`timeCnv`

The included Catalog Help application doesn’t describe these.
Consult Appendix A of the
Guidebook
for the use of these catalog entries — except for
`ExecLib`

and `OpenLib`

, which seem to be
undocumented.

This page compares the two models I have, the TI-83 Plus Silver Edition and the TI-84 Plus Silver Edition. I know of only these differences between the plain TI-84 Plus and the Silver Edition:

- The Simultaneous Equation Solver, Polynomial Root Finder, and Pie Chart applications aren’t preloaded on the plain TI-84 Plus.
- The Silver Edition has 1.5 MB of flash ROM compared to the Plus’s 480 KB.
- The Silver Edition has swappable faceplates. (Whoop-de-do.)

If you have a plain TI-84 Plus, I’d be grateful for a report of any of the functions listed above that your calculator doesn’t have.

**4 Nov 2013**: Add some details about the OS upgrades for TI-84s.**4 Oct 2013**: In describing the wizard interface, correct [`STAT`

]`TESTS`

to [`STAT`

]`CALC`

.**31 Dec 2012**: Fix a broken link to the Guidebook.**23 Dec 2012**: Add the principal firmware changes; they’re marked “new in 2.55MP”. Add instructions for getting the firmware.- (intervening changes suppressed)
**22 Jul 2006**: New document.

This page is used in instruction at Tompkins Cortland Community College in Dryden, New York; it’s not an official statement of the College. Please visit www.tc3.edu/instruct/sbrown/ to report errors or ask to copy it.

For updates and new info, go to http://www.tc3.edu/instruct/sbrown/ti83/