Plus42 Equations, Preview Release

[Thomas Okken]

New update: Units. They are under CATALOG: on the first row, UNITS has all the units from the 48G, and on the fourth row, UNIT has the unit-related functions.

This should all be pretty similar to the way it works on the 48G, with a couple of exceptions:

1. In addition to applying units using the UNITS catalog, you can type them alphabetically, by pressing Shift-Period during number entry. You have to finish the unit by pressing ENTER, or you can get rid of it by pressing EXIT.
2. Since there's only one shift key, LeftShift+Unit is not available as a shortcut to convert to a unit, you have to use CONVERT, or attach the desired unit to zero and add that to the number you want to convert. (That second trick doesn't work for converting to and from Celsius or Fahrenheit, though.) I'm still thinking about a less clumsy way to handle CONVERT.

There's no support for units in programs or in the equation editor yet, nor in Copy and Paste. But they should work with arithmetic (including STO and RCL arithmetic), 1/X, X^2, SQRT, and Y^X (integer and 1/integer exponents only; with 1/integer exponents and SQRT, all the units must have powers divisible by the exponent, since units with non-integral exponents are not allowed, unlike on the 48G). Also, SIN, COS, TAN, →REC, and COMPLEX in POLAR mode will recognize angles with angular units and treat them appropriately, ignoring the current angle mode.