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HISTORY
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2017-08-12: release 2.0.6
* Decimal version: fixed ISG and DSE for values >= 2^63 (9.2e18).
* Fixed a couple of bugs in how changes to internal SOLVE and INTEG data
structures are handled.
2017-07-30: release 2.0.5
* Fixed INTEG termination condition. It would return inaccurate results in
certain cases.
* Fixed importing numbers with exponent but no mantissa, e.g. E3, -E-5, etc.
This got broken in 1.5.
* Fixed crash when trying to allocate ridiculously large matrices.
* While entering a numeric argument, the up-arrow and down-arrow keys would
perform BST and SST, which should be blocked. Fixed.
* Testing flag 75 would turn on the programmable menu. Fixed.
* iPhone version: fixed a few display alignment issues with the built-in 4"
skin.
2017-05-29: release 2.0.4
* Implemented special-case code for pure real and pure imaginary numbers in all
the complex logarithmic, trigonometric, and hyperbolic functions.
2017-05-28: release 2.0.3
* Fixed a few edge cases in complex functions.
* The last digit in full-precision representation (SHOW, Copy) could be off by
one in certain circumstances. Fixed.
* On cold start, now clearing flags 21 (printer enable) and 55 (printer
existence), to match the behavior of the real HP-42S.
* Removed "raw text" print option; it has been obsolete since the introduction
of UTF-8 printing in 1.5.11, since Unicode can represent the HP-42S character
set directly.
* iPhone version: LOCAT didn't work when its initial invocation happened from a
program. Fixed.
* In the About box, replaced the link to the Free42 discussion group with a
link to the Alternative HP-42S/Free42 Manual.
2017-04-28: release 2.0.2
* In Unicode-to-HP conversion, translate "\LF" and "[LF]" to 10, not 138.
Character 138 only exists to *represent* LF, but isn't available in the ALPHA
menu and therefore cannot appear in non-synthetic programs.
* Unicode-to-HP conversion handles curly quotes now (U+2018, U+2019, U+201C,
U+201D).
2017-04-23: release 2.0.1 (beta)
* Change right-pointing triangle from Unicode U+25B6 (black right-pointing
triangle) to U+25B8 (black right-pointing small triangle); the former gets
rendered as an emoji in iOS, while the latter doesn't, plus, the smaller
triangle looks better in listings anyway.
* MacDashboard version: Fixed multi-line pasting.
2017-04-22: release 2.0 (beta)
* Copy & Paste now handle matrices, ALPHA mode, and PRGM mode.
2017-04-01: release 1.5.15
* Instead of being limited to 12 mantissa digits, full precision (34 digits in
the Decimal version, 16 digits in Binary) is now supported for number entry,
SHOW, Copy, and Paste.
2017-03-11: release 1.5.14
* Changed complex TAN and TANH to use more accurate formulae.
* The Time Module functions used to keep track of MDY/DMY modes using an
invisible flag. For better HP-41 compatibility, they now use flag 31.
* Android version: Made state file writing more robust. If writing the state
file fails, it now keeps the previous one, instead of leaving behind a
partial or corrupt one.
* GTK version, Free42 Binary only: Some (recent?) versions of GTK set the
LC_NUMERIC locale, which Free42 expects to always be "C". This causes number
entry and display to be messed up in locales where the decimal is not ".",
including most of Europe. I added code to force LC_NUMERIC back to "C" after
gtk_init(), fixing this problem.
* Binary version: Fixed binary round-off problem in ADATE (for example,
10.102010 would be rendered as 10/10/2009).
2017-01-22: release 1.5.13
* When DIM, SIZE, or SIMQ resize the indexed matrix, and when CLV deletes the
indexed matrix, IJ should be set to (1, 1); and when DIM, SIZE, or SIMQ try
to resize the matrix currently being edited by EDITN, and when CLV tries to
delete the matrix currently being edited by EDITN, they should return a
"Restricted Operation" error. Neither happened, creating the potential for
memory corruption if IJ ended up pointing outside the matrix' data array.
Fixed.
* STO and STO* allowed the target to be the matrix under edit by EDITN. They
should not allow this, but return "Restricted Operation" instead. Fixed.
* CLALL didn't always exit all menus. Fixed.
2016-10-03: release 1.5.12
* Android version: Fixed UTF-8 printing, which was broken in 1.5.11.
* All versions: when printing to text, up-arrow now looks like an up-arrow,
instead of a caret.
2016-10-01: release 1.5.11
* EXITALL didn't always exit all menus. Fixed.
* Print-to-text now emits UTF-8 encoded text, instead of ISO-8859-1.
* Print-to-text now emits CRLF line separators on all platforms.
* Android version: didn't save the "raw text" print setting. Fixed.
* Android version: added landscape skin; made it the default for landscape mode
in new installs.
2016-09-04: release 1.5.10 (Android, Windows, Mac, and Linux)
* Fixed AGRAPH bug with complex number in X.
2016-09-04: release 1.5.9 (Android, Windows, Mac, and Linux)
* Now building the Intel Decimal Floating-Point Math Library from source for
all targets. In terms of the end user, this makes no difference, but it will
make life easier for people who want to port Free42 to platforms that I don't
support myself (FreeBSD, Solaris, etc.); those platforms were left out in the
cold when I started using the Intel library and only provided pre-built
binaries for the supported platforms.
* Implemented range reduction for more accurate TAN in DEG and GRAD modes.
* Android version: now handles orientation change more efficiently.
2016-04-26: release 1.5.8f (Android only)
* Rolled back 8e, which was a disaster; it didn't fix the remaining black
line issues, but it did cause crashes everywhere.
2016-04-26: release 1.5.8e (Android only)
* The previous fix for the thin-black-line problem didn't do the job on some
devices. Here's another fix that should do a better job.
2016-04-25: release 1.5.8d (Android only)
* Fixed the thin black lines that would sometimes appear around the display.
* In full-screen mode, swiping down from the top would post the menu, because
the initial touch would be in the same area that Free42 watches as the menu
trigger. I changed the code so that the trigger only fires if the user lifts
their finger while still inside that critical area, which will only happen
if the downward swipe is very short.
* Fixed the top-of-screen menu trigger so that it no longer sabotages keys
that are also in that area, as in the HP_Mega_42 skin.
2016-04-24: release 1.5.8c (Android only)
* Implemented true full-screen mode. This hides the navigation bar as well the
status bar, on devices running Android 4.4 (KitKat) or later.
2016-04-23: release 1.5.8b (Android only)
* Print-Out is now scaled to make better use of available screen width.
* Fixed key clicks.
* Implemented Reverse Portrait (upside-down) mode.
2016-04-17: release 1.5.8a (Android only)
* Tapping in the top half of the display now brings up the app's option menu.
2016-04-17: release 1.5.8
* Entering an END into a program using the CUSTOM menu would leave the program
counter at an invalid value, leading to memory corruption, state file
corruption, and crashes. Fixed.
* Android version: changed haptic feedback code back to using the old API.
* Android version: changed targetSdkVersion from 3.0 to 2.2. This should make
the menu reliably accessible in all Android versions and with all display
styles.
* Resurrected the Mac OS X Dashboard version; the display repaint logic now
supports Yosemite (10.10) and later.
2016-03-19: release 1.5.7a (Android only)
* Made the action/title bar optional.
* Added full-screen mode (removes action/title bar and status bar).
* Added installLocation=auto to the manifest, so the app can now be installed
on an SD card.
2016-02-28: release 1.5.7
* INSR should disable stack lift, but didn't. Fixed.
* Android version: added Action Bar, reluctantly embracing the reality of
devices with no menu button (or hard-to-find menu buttons, like the "press
and hold the task switch button" behavior on some devices).
2014-12-21: release 1.5.6
* iPhone version: implemented Copy and Paste.
* iPhone version: fixed LOCAT for iOS 8.
* All versions, on hard reset, now initializing flag 28 (decimal point/comma)
to match the host's locale.
* Paste didn't clear the message flags. Fixed.
2014-11-12: release 1.5.5
* Decimal version: entering a number with an empty exponent (e.g. 1E or 1E-)
would yield <Not a Number>. Fixed.
* iPhone version: HTTP server: Fixed downloading individual programs from, and
uploading zip files of programs to, the /memory directory. This got broken in
release 1.4.77, while implementing local file download.
* Android version: when the screen orientation was set to "automatic", it would
not honor any system-wide orientation lock. Fixed.
2014-11-08: release 1.5.4a (Android only)
* Fixed crash on startup in Android 5.0 (Lollipop).
* Printing to text would truncate the file whenever it was reopened, opening it
for writing rather than appending. Fixed.
2014-09-23: (no new code release)
* Added nova1_1096 skin, for iPhone 5, to the Free42iPhoneSkins package.
Contributed by Keith Carangelo.
2014-09-06: release 1.5.4a (iPhone only)
* Fixed keyboard handling in the Preferences and Select File dialogs.
* Fixed scrolling behavior (in 1.5.4, windows were sized 20 pixels beyond the
bottom of the screen, making the bottommost bit of scroll views drop off the
screen).
* Added 4" skin for iPhone 5, and added code to select the best-fitting built-
in skin on first launch.
2014-07-22: release 1.5.4
* Decimal version: Fixed ACOS. It would return 0 for acos(-1).
This bug was introduced in release 1.5.
2014-06-21: release 1.5.3a (Android only)
* Made GPS optional. When I added the ACCESS_FINE_LOCATION permission in
1.4.78, that had the side effect of making GPS a requirement. In 1.5.3a,
the app manifest explicitly states that the GPS is not required.
2014-05-25: release 1.5.3
* Fixed crash in SIMQ if any of MATA, MATB, or MATX already existed and was a
scalar or string.
2014-05-10: release 1.4.78 (Android only)
* Fixed the LOCAT function, by adding the ACCESS_FINE_LOCATION permission.
2014-03-16: release 1.5.2
* Decimal version: fixed Y^X for complex Y and negative integral X.
* Decimal version: made Y^X and 10^X for real Y and integral X more accurate.
* All versions: sin(45°) now equals cos(45°), and sin(50grad) = cos(50grad).
2014-03-15: release 1.5.1
* All versions: fixed ASIN, ACOS, and ATAN so they return exact results in DEG
and GRAD modes for trivial parameters (asin(1), asin(-1), acos(0), atan(1),
atan(-1), atan(infinity).
* Now displaying signed zero as zero, so you won't see -0 any more.
* Windows version: removed the "Free42 Directory" setting from the Preferences.
The application now looks for a file or directory named "portable" in the
directory where Free42Decimal.exe or Free42Binary.exe itself is located; if
it exists, the state.bin, print.bin, and keymap.txt files will be stored in
this directory as well, and skins will only be loaded from this directory. If
there is no "portable" item in the executable's directory, it will store
state.bin, print.bin, and keymap.txt in %APPDATA%\Free42, and it will load
skins from that directory, and from the executable's directory.
2014-03-09: release 1.5
* Decimal version: switched from BCD20 to Intel's Decimal Floating-Point
Library v2.1.
* Binary version: replaced the old binary-to-decimal and decimal-to-binary
conversions with code that uses the standard C library's equivalent
functionality. This fixes final-digit errors in the Binary version, and also
final-digit errors when switching from the Decimal to the Binary version.
* All versions: added angle reduction code to make SIN, COS, and ->REC more
accurate in DEG and GRAD modes.
* Windows version: now uses %APPDATA%\Free42 as the default Free42 directory
(for storing state.bin, print.bin, and keymap.txt). This avoids permissions
problems when people install the executable in a directory to which they
don't have write access (like the popular choice C:\Program Files).
2013-12-08: release 1.4.78
* All versions except Android: while parsing macros in skin layout files, tab
characters were not recognized as whitespace and caused parsing to fail.
Fixed.
* GTK version did not repaint the skin when it was switched from one skin to
another with the same width and height. Fixed.
* Windows version: downgraded my build environment from Visual C++ 2012 to 6.0.
This means the Free42 build for Windows will run on older versions of Windows
again.
2013-12-07: release 1.4.77a (Android only)
* Android version: The "external storage" filesystem is no longer referred to
by the hard-coded path /sdcard, but using the external storage directory name
provided by the Environment. This should help prevent problems like exporting
programs and then not being able to find them from the PC.
* The file selection dialog will now append the file extension if the filename
doesn't include it already.
2013-06-15: (no new code release)
* Three new skins, and many tweaks to existing skins, contributed by KD0GLS.
The Free42Skins.zip, Free42iPhoneSkins.zip, and Free42AndroidSkins.zip
packages were all updated.
* Added two new skins for large Android devices. Contributed by Tyge Loevset.
2013-06-08: (no new code release)
* Galaxy_Nexus skin to Android skins package. Contributed by Andrew Novinc.
2013-03-02: release 1.4.77a (iPhone only)
* iPhone version: fixed "Make Directory" in the file selection dialogs.
* iPhone version: when the user turns off printing to text or to GIF in the
Preferences, or changes the print-out file name, the existing files are now
promptly flushed and closed.
* iPhone version: fixed "garbage" in print-out window.
* iPhone version: now highlights the currently selected skin in the Select Skin
menu.
2013-02-17: release 1.4.77
* iPhone version: the links in the About view now actually work.
* iPhone version: implemented 'New directory' and 'Delete' in the HTTP Server.
* iPhone version: implemented zip file upload and download in the HTTP Server.
* iPhone version: implemented local program import/export.
* iPhone version: implemented print-out window.
2013-01-06: release 1.4.77
* All versions except iPhone: the links in the About boxes now actually work.
2013-01-01: release 1.4.76
* Mac version: implemented print-out window.
2012-12-17: release 1.4.75b (iPhone only)
* iPhone version: fixed three issues with the HTTP Server (displaying the wrong
IP address, binding to the network incorrectly, and a crash when writing to
the on-screen log).
2012-12-04: release 1.4.75a (iPhone only)
* iPhone version: clicking Done on the HTTP Server window could cause the app
to freeze under certain circumstances. Fixed.
2012-11-24: release 1.4.75
* Android version: implemented haptic feedback option (vibrate on keypress).
2012-10-27: release 1.4.75
* iPhone version: in the HTTP Server view, tapping on the server URL switches
between the DNS name and the IP address.
* GTK version: now uses ALSA to play BEEP and TONE sounds (but not when running
on remote displays).
2012-07-29: release 1.4.74b (Android only)
* Android version: now writes state file when moved to background.
2012-05-06: release 1.4.74a (Android only)
* Android version: fixed a couple of bugs that could cause crashes while
printing.
2012-05-05: release 1.4.74
* Decimal version: the overflow fix in 1.4.73 was incorrect. This one works.
2012-05-05: release 1.4.73
* iPhone version: now writes state file when moved to background.
* OFF now refuses to shut down Free42 if there have been no keystrokes since
the application was started. It will stop program execution and display
the message "Suspicious OFF" instead.
This prevents code like LBL "OOPS" SF 11 OFF GTO "OOPS" from locking the
user out.
* Decimal version: overflows would return zero in some cases, i.e.
9E9999 ENTER +. Fixed.
2012-04-15: release 1.4.72
* Android version: added "skin smoothing" and "display smoothing" check boxes
in the Preferences view.
2012-04-14: release 1.4.71
* HMS+ and HMS- would return results with the wrong sign under certain
circumstances: result < 0 and |result| < 59 seconds, or result < 0 and
|result| > maximum integer. Fixed.
2012-04-09: release 1.4.70b (Android only)
* Android version: fixed app manifest so the app no longer obtains the
READ_PHONE_STATE permission, which it never needed anyway.
Some background: Apps targeted at Android 1.5 automatically get
READ_PHONE_STATE and WRITE_EXTERNAL_STORAGE when installed in Android 1.6 or
higher, without the user being told, and this tends to look under-handed to
users who aren't aware of what's going on. Free42 now targets 1.6, which
means it doesn't get any permissions silently.
It does now request WRITE_EXTERNAL_STORAGE, because it needs it for printing
to files and for exporting programs.
Note that the app still runs on 1.5 and later; the requirements for running
it have not changed.
2012-02-12: release 1.4.70a (Android only)
* Android version: fixed app manifest to make the app work with screens other
than 320x480. This should fix the problem of skins not filling the whole
screen on some devices.
2011-09-18: release 1.4.70
* Fixed several bugs in complex ASIN, ASINH, ACOS, and ACOSH.
* Android version: better printer icon in the main menu, by Günter Schink.
* Mac version: OFF didn't work when invoked from a program. Fixed.
2011-06-11: (no new code release)
* Added two new skins to the Android skins package, designed for the Samsung
Galaxy S 9000, which has an 800x480 screen. Contributed by Günter Schink.
2011-05-22: (no new code release)
* Added Free42AndroidSkins.zip package, for skins designed for Android-based
devices; added HTC4800 skin for HTC Desire HD or other Android devices with
480x800 screens. Skin contributed by Michael Vogel, based on an iPhone skin
by Jerrod Hofferth.
2011-04-22: release 1.4.69 (Android only)
* Added "orientation" option in Preferences, allowing the user to lock the app
in landscape or portrait mode.
* Improved the layout of the file selection and Preferences dialogs.
* The file selection dialog no longer disables files that don't match the
filter; it now hides them.
2011-04-20: release 1.4.68
* INVRT did not perform any type checks, leading to badness when it was applied
to anything that wasn't a matrix. Fixed.
2011-04-10: (no new code release)
* Added six new skins to the iPhone skins package. Contributed by Javier
Goizueta.
2011-03-13: release 1.4.67
* ASIN returned incorrect results for large complex arguments. Fixed.
* iPhone version: added support for 640x920 skins.
* Added Silver And Blue skin to Free42PocketPCSkins.zip package. Contributed by
David Geiger.
* The SST and BST key labels were switched in these skins:
ppcskins/Andy480x800.gif ppcskins/Ramos240x400.gif ppcskins/Ramos480x640.gif
ppcskins/SilverAndBlue.gif ppcskins/StandardPPC.gif
ppcskins/StandardPPCsm.gif skins/Andy480x800.gif
Fixed.
2010-04-08: release 1.4.66
* Removed the "Not Yet Implemented" Time functions; I decided not to implement
them. They're also gone from the FCN catalog.
The ADATE, ATIME, ATIME24, CLK12, CLK24, DATE, DATE+, DDAYS, DMY, DOW, MDY,
and TIME functions remain; those are the time/date-related functions from the
HP-41 Time Module that are actually useful in Free42.
The functions that I decided not to implement after all are the following:
Live clock display: CLKT CLKTD CLOCK
Stopwatch: RCLSW RUNSW SETSW STOPSW SW
Alarms: ALMCAT ALMNOW XYZALM
Clock control: CORRECT RCLAF SETAF SETDATE SETIME T+X
* In DMY mode, DATE would display dates as DD:MM:YYYY, but that should be
DD.MM.YYYY. Fixed.
2010-04-03: release 1.4.65
* Implemented some more Time Module functions: ADATE, ATIME, ATIME24, CORRECT,
RCLAF, SETAF, SETDATE, SETIME, T+X.
2010-03-30: release 1.4.64
* Implemented some more Time Module functions: DATE+, DDAYS, and DOW.
2010-03-28: release 1.4.63
* iPhone version: implemented ACCEL, LOCAT, and HEADING functions, for querying
the device's accelerometer, location services (GPS on the 3G and 3GS; WiFi-
based on all other models), and compass (3GS only).
* All versions except Mac Dashboard: for skins, increased the maximum macro
length from 31 to 63. The old limit was too small to allow macros that step
forward all the way to the end of the FCN catalog, and supporting such macros
is necessary now that the length of the FCN catalog is no longer fixed at 42
rows.
* Also, changed several macros in the HP-41 and HP42CY skins where the FCN
catalog was being traversed backwards, replacing N repetitions of "up" with
42-N repetitions of "down", so they will work correctly in the presence of an
extended FCN catalog. (None of the other skins currently in the Free42
repository traverse the FCN catalog backwards, so they don't need updating.)
* PalmOS version: turning off printing did not flush the GIF file, so you'd end
up with a truncated image. Fixed.
* When COMPLEX is executed with a complex number or complex matrix in X, and
POLAR mode is active, it is possible for range errors to occur. Free42 would
simply substitute POS_HUGE_VAL in such cases, but that was incorrect; it
should report Out of Range or substitute POS_HUGE_VAL depending on the
setting of flag 24. Fixed.
* R/S can now be pressed using the PC keyboard even when ALPHA mode is active.
2010-03-07: release 1.4.62
* Windows version: now has an option in the Preferences screen to map the
Calculator key, found on many newer keyboards, to launch Free42.
* iPhone version: the hostname lookup for the HTTP Server window is now done in
a background thread, so that a slow or malfunctioning DNS server no longer
causes the app to freeze on startup.
* When EDITN was active, you could overwrite the edited matrix with a scalar
using STO, or delete it using CLV -- and then you would be stuck in the
Matrix Editor, and even CLALL couldn't get you out. Fixed; you will now get
the Restricted Operation message when you try to change or delete the active
matrix behind EDITN's back.
2009-12-29: (no new code release)
* Added HP-41 skin to the Free42Skins.zip package. This skin mimics the HP-41
layout, and includes many macros to map additional functions to the keyboard.
Contributed by Guenny.
2009-11-25: release 1.4.61
* Decimal version: ->OCT (decimal-to-octal conversion) was broken; it actually
converted octal to decimal. Fixed.
2009-11-11: (no new code release)
* Added HP42CY skin to the Free42Skins.zip package. This skin includes many
macros to map additional functions to the keyboard. Contributed by Guenny.
* Added kacskin and kacskin_yellow skins to the Free42Skins.zip package.
These are slightly modified versions of Michaels HP, and may be easier to
read on some screens. Contributed by Keith Carangelo.
2009-11-08: release 1.4.60
* Decimal version: SQRT could be off by 1 in the final digit. It now computes
one additional digit and rounds it into the mantissa, which should make it
accurate in all cases.
* Decimal version: The BCDFloat add and subtract functions could return
denormalized results when one of the arguments was zero. Free42 would not
display these denormalized numbers correctly, leading to strange results like
1.0001 LOG returning something that looked like zero but wasn't. Fixed.
2009-10-31: release 1.4.59
* MacDashboard version: changed the background from green to gray, and changed
the transparency to fully opaque.
* PalmOS Decimal version builds & works again; fixed the SQRT crash and the
divide bug (caused by 16-bit integer overflow, oops).
* Decimal version: re-fixed the subtract bug which had originally been fixed in
1.4.53, but reappeared in the great BCDFloat/BCDFloat2 refactoring.
* Decimal version: 1e-10000 LOG and 1e-10000 LN returned <Not a Number>. Fixed.
* CLV and PRV didn't work from the CUSTOM menu, potentially even causing a
crash. Fixed.
2009-10-24: release 1.4.58
* Removed Byron's BIGSTACK and BIGLCD hacks; these will be maintained in a
separate fork from now on. This protects the other Free42 versions from bugs
in the 42S/iPhone code, and right now, it fixes some display glitches in the
other versions.
2009-10-19: release 1.4.57
* New LOG code (again), for exact results when the argument is a power of 10.
The bug from version 1.4.55 is fixed.
* Subtract would lose one digit of precision for edge cases like
1 - 0.9999999999999999999999999; fixed.
2009-10-12: release 1.4.56
* The new LOG implementation introduced in Decimal version 1.4.55 was broken;
rolling back to 1.4.54 version. (Note that this means that powers of 10 do
not yield exact results, but at least everything *else* is OK again now.)
2009-10-10: release 1.4.55
* Some improvements in the new BCDFloat code:
. LOG (common log) is now precise for powers of 10.
. MOD function now works for large arguments.
. rounding fix in multiply now gets 1/3*3-1 and 10/3*3-10 the same answer,
10/7*7-10 is not the same, but this is correct (it depends on where you cut
off the number).
. optimisations to subtract routine.
* Mac version: now uses $HOME/Library/Application Support/Free42 instead of
$HOME/.free42 for persistent state, keymap, and skins. If this directory
does not exist, but $HOME/.free42 does, the latter is renamed to the former.
* Switching from a version using the old BCDFloat code (1.4.51 or earlier) to a
version using the new code (1.4.52 or later) wasn't handled properly; it
should handle the change in how Infinities and NaNs are represented, but it
didn't. This is related to the problem fixed in 1.4.54.
Starting with this version, all state files created by versions 1.4.51 and
older are assumed to contain old-style BCDFloat, and state files created by
versions 1.4.52 and newer are assumed to contain new-style BCDFloat.
This means that BCDFloat numbers created by all previous versions of Free42
Decimal will now be interpreted correctly, however, any state file that has
become damaged by upgrading from <= 1.4.51 Decimal to 1.4.52-54 will still
be damaged, and the only way to make sure no such damage remains is to do
CLALL and reload all programs and data.
to| <=51| <=51|52-53|52-53| 54 | 54 | >=55| >=55
from | dec | bin | dec | bin | dec | bin | dec | bin
---------+-----+-----+-----+-----+-----+-----+-----+-----
<=51 dec| + | + | - | + | - | - | + | +
<=51 bin| + | + | - | + | + | + | + | +
52-54 dec| c | c | + | - | + | + | + | +
52-54 bin| c | c | - | + | + | + | + | +
>=55 dec| c | c | c | c | c | c | + | +
>=55 bin| c | c | c | c | c | c | + | +
LEGEND: This chart shows compatibility between Free42 state file versions. To
check if version A will correctly handle state files produced by version B,
check the cell at column A, row B. The numbers 51..55 in the chart refer to
Free42 releases 1.4.51 through 1.4.55.
A 'c' means you will get a "State File Corrupt" message; "+" means the state
file will be read correctly, and "-" means the state file will be read, but
some numbers will be converted incorrectly.
Note that once the Free42 state has become damaged by an upgrade marked with
"-" in this chart, it will stay damaged; so, for example, upgrading from
1.4.51 Decimal to 1.4.52 Decimal, and then to 1.4.55 Decimal, may result in a
damaged state, while upgrading from 1.4.51 Decimal to 1.4.55 Decimal directly
will not.
2009-08-28: release 1.4.54
* The new BCDFloat code, introduced in version 1.4.52, uses a different
convention for representing NaN and infinities: instead of using special
values in the exponent, it now uses dedicated flags, and has a narrower
exponent field. The code that converts between decimal and binary, when
switching between Free42 Decimal and Free42 Binary while keeping the same
state file, did not deal with this new convention, and, as a result,
switching between those versions could cause numbers to become NaN or
Infinity when they shouldn't.
This release fixes this. It is only relevant to those who switch between
Free42 Decimal and Free42 Binary.
2009-08-17: release 1.4.53
* Decimal version: fixed a bug in the subtract routine that could cause
incorrect, malformed results in some cases, e.g. 4 ENTER 3 / 1 - 3 * 1 -
returned -:.E-25.
2009-08-08: release 1.4.52
* New: Mac version. This is a native application, not a Dashboard widget; it
is functionally identical to the PC versions (Windows, GTK, and Motif).
The print-out window doesn't work yet, though printing to files does;
everything else is working. The print-out window will be finished in a two
or three weeks, barring the unforeseen. I'm releasing the app in this
incomplete state because I feel it is stable and usable, and should be a
big improvement for those currently using the Dashboard widget.
This is a Universal application, so it should run on PowerPC and Intel-
based Macs. It requires Mac OS X 10.5 or later.
* Decimal version: Merged Hugh Steers' latest BCD code. This provides more
accurate transcendentals and some bug fixes.
* Also, Hugh improved the error estimate for the Romberg integration code;
it now converges more quickly in many cases.
* MacDashboard version: now recognizes '*' and '+' on the numeric keypad.
2009-07-10: release 1.4.51
* Changed the homepage URL to http://thomasokken.com/free42/.
2009-06-29: release 1.4.50
* Adding or subtracting two complex matrices, and adding or subtracting a
complex matrix in X to or from a complex scalar in Y, would cause memory
corruption, resulting in a crash soon after. Fixed.
2009-06-13: (no new code release)
* Added "Realistic42s240x400" skin for 240x400 Pocket PC devices
(Free42PocketPCSkins.zip package). Contributed by Denis Cesar.
2009-06-07: release 1.4.49
* BASE/ tried to catch division by zero by looking at Y instead of X. Oops! The
result was that 0/1 would return "Divide by 0" and 1/0 would cause Free42 to
crash. Fixed.
* PalmOS version: tall skins can now be selected on all devices, regardless of
whether they have tall screens or not. On most devices, this isn't useful,
but the tallness check had the effect of suppressing the 320x450 Ehrling42sm
skin on the Tapwave Zodiac, which has a 480x320 screen; the result was that
you couldn't use that skin even if you switched to portrait mode.
2009-05-05: (no new code release)
* Added "Ramos240x400" skin for 240x400 Pocket PC devices
(Free42PocketPCSkins.zip package). Contributed by Miguel Toro; based on
Ramos480x640 by Noe Ramos.
2009-04-04: release 1.4.48
* Fixed PSE; it no longer freezes the UI for one second, but uses a proper
timeout, so event processing can continue, and keystrokes during PSE have
the proper effect (of stopping program execution and then being handled
normally).
2009-03-04: release 1.4.47
* Another UVEC bug: it should return Invalid Data when the magnitude of its
argument (|z| for complex scalars, FNRM for real matrices) is zero. It
returned its argument unchanged instead. Fixed.
2009-02-22: release 1.4.46
* UVEC returned Invalid Type for complex scalar arguments. Fixed; it now returns
z/|z| (same as the SIGN function for such arguments), like the real HP-42S.
* When functions with arguments, e.g. STO, FIX, etc., were entered into a
program from the CUSTOM menu, they would get inserted before the current
program line instead of after. Fixed.
2009-01-28: release 1.4.45
* ASTO IND ST X was broken; instead of storing the first 6 characters of the
ALPHA register into the register or variable pointed to by X, it stored them
into the variable pointed to by the first six characters of ALPHA itself.
Fixed.
2009-01-14: (no new code release)
* Added "Lienhard480x800" skin for 480x800 Pocket PC devices
(Free42PocketPCSkins.zip package). Contributed by Thomas Lienhard.
* Added "Sven320x240mini" skin for 320x240 Pocket PC devices
(Free42PocketPCSkins.zip package). This skin only shows the keys for basic
arithmetic and stack manipulation, making the keys large enough to use easily
without a stylus. Contributed by Sven from Vienna.
* Added "Ramos480x640" skin for 480x640 Pocket PC devices
(Free42PocketPCSkins.zip package). It has a distinctive, sparse look.
Contributed by Noe Ramos.
2008-08-16: release 1.4.44
* Made auto-repeat for number entry and ALPHA modes optional. The auto-repeat
feature, introduced in release 1.4.11, is not found on the real HP-42S, and
can cause problems if you don't expect this kind of behavior in a calculator.
It can now be turned off in the Preferences dialog, though the default is
still for it to be on.
Note that this is unrelated to the auto-repeat for the 'up' and 'down' keys,
which is authentic HP-42S behavior, and cannot be turned off.
2008-04-12: release 1.4.43
* MacDashboard version: fixed event handling so that program execution now
works. There's still plenty of room for improvement: key timeouts (so
pressing and holding a key behaves like it does on the real HP-42S and on
the other Free42 versions) and auto-repeat come to mind... But at least
programs, the solver, the integrator, and interruptible matrix functions
should all be usable now.
2008-03-10: release 1.4.42
* Pocket PC version: I added a HI_RES_AWARE resource so that Free42 will now be
able to take advantage of high-resolution displays without the help of
Tweaks2k2 or similar utilities.
2008-01-11: (no new code release)
* Added "Khor" skin for Windows and Unix versions (Free42Skins.zip package).
Contributed by Michael Khor.
2008-01-01: release 1.4.41
* PalmOS version: when opening the print-out database fails with a 0x0209 error
(database corrupt), it now deletes the database, creates a new one, and tries
again.
2007-12-15: release 1.4.40
* The 'Paste' command now handles binary, octal, and hexadecimal values when
the calculator is in the respective base modes. Note that 'Copy' has
supported non-decimal bases since times immemorial, so this simply makes
clipboard handling consistent at last.
2007-12-15: release 1.4.39
* Windows version: the single-instance option did not work when the previous
instance was minimized. Fixed.
2007-12-14: release 1.4.38
* Windows, GTK and Motif versions: implemented single-instance option. This is
on by default in the Windows version, but off by default in the GTK and Motif
versions, since many X11 window managers won't let clients raise themselves.
(PalmOS is single-tasking, and Pocket PC enforces single-instance behavior
for all applications, so this option does not apply to those environments.)
2007-12-08: release 1.4.37
* Changed the homepage URL to http://free42.sourceforge.net/.
2007-08-15: (no new code release)
* The Motif version did not compile under Ubuntu 64-bit; its version of g++
considers the loss of precision that occurs when casting a void* to an int to
be a fatal error, and motif/shell_main.cc used such casts in two places
(those casts were legit -- not a bug!). I fixed shell_main.cc so that it
first casts to a long, then to an int: the loss of precision when casting
between integer types is not frowned upon, so this should compile anywhere
with no errors or warnings.
I'm only updating the free42.tgz package, and not releasing any new
executables, since this code change does not actually affect any of the
existing builds.
2007-07-28: (no new code release)
* Added "Ehrling42ss240sq" and "SemiReal240sq" skins for 240x240 Pocket PC
devices (Free42PocketPCSkins.zip package).
* Added information about keyboard mapping to the README files for Pocket PC,
Windows, Motif, and GTK.
2007-05-12: release 1.4.36
* PalmOS 68k version: under PalmOS < 3.2, importing and exporting programs
would cause a crash, because I was using a Progress Manager API that did not
yet exist in those versions. Fixed now; as it turns out, I never needed that
newer API in the first place; the PalmOS 3.0 version does the job just fine.
2007-05-06: release 1.4.35
* Binary version: AIP would mangle some numbers; the underlying function to
extract the digit in a number's units position was broken. Fixed.
* Decimal version: Modified BCDFloat::_usub() so that it performs the
subtraction using an extended (8-digit) mantissa. This fixes the behavior of
borderline cases like 0.9999999999999999999999999 - 1 (used to yield 0, now
-1e-25) and 1 - 1e-25 (used to yield 1, now 0.9999999999999999999999999).
2007-04-04: (no new code release)
* The "Standard" skin for the PalmOS version (Free42PalmOSSkins.zip package)
had the labels for SST and BST switched. Fixed.
2007-04-01: release 1.4.34
* SOLVER: when the Ridders algorithm made no further progress, because the
interpolated value coincided with one of the interval's endpoints, it would
use the interpolated value as the final estimate of the root, without
checking if it was in fact the best estimate; the best estimate can
sometimes be the opposite endpoint. Added a check to make sure the best
estimate is returned.
* GTK and Motif versions: now set the WM_WINDOW_ROLE property on all top-level
windows, to allow window managers to use different policies on the various
windows depending on their role. This property is set to "Free42 Calculator"
for the main window, "Free42 Print-Out" for the print-out window, and to
"Free42 Dialog" for all dialogs.
2007-03-23: release 1.4.33
* PalmOS ARM version: would not run on some Palm Tungsten T models, because
they report an incorrect ROM version number. Made the version number check a
bit more lenient so that it will accept "Development" versions as well as
"Release" versions.
2007-03-20: (no new code release)
* Added "StandardPPCsm" skin for 240x240 Pocket PC devices
(Free42PocketPCSkins.zip package).
2007-02-27: release 1.4.32
* When the BASE application was active, the arithmetic keys and +/- would be
reassigned the BASE+, BASE-, BASE*, BASE/, and BASE+/- functions -- which is
good, but these assignments would stay in effect even if a non-application
menu was active on top of BASE, and that was wrong. Fixed now.
2007-02-18: release 1.4.31
* Decimal version: Floating-point addition would return an incorrectly rounded
result under certain circumstances. Fixed.
2007-02-14: release 1.4.30
* INTEG reported the difference between the final iteration and the one before
in the Y register (the error estimate), but without taking the absolute
value first. As a result, the reported accuracy could be negative. Fixed.
2007-01-27: release 1.4.29
* Decimal version: did not handle numbers without mantissa correctly while
importing programs (i.e. lines like "E4"; see the notes for release 1.3.5).
The binary version has handled this kind of thing correctly since release
1.3.5, but the decimal version did not. Fixed.
2007-01-06: release 1.4.28
* INTEG used to treat ACC as an absolute error bound, but that is not
consistent with the behavior of the real HP-42S. Fixed; it is now treated as
a relative error.
2006-11-11: (no new code release)
* Added "Realism" skin for high-density (320x320 and higher) PalmOS devices
(Free42PalmOSSkins.zip package). Contributed by Curtis Cameron.
2006-08-21: release 1.4.27
* The int2string() function did not handle numbers with more than 9 digits
correctly. This caused MEM to display gibberish on machines with more than
999,999,999 bytes of available physical memory.
Fixed; also, the code now interprets free memory as an unsigned number,
rather than signed, so that free memory up to 4,294,967,295 bytes should now
be reported correctly.
2006-07-11: release 1.4.26
* PalmOS ARM version: Paste didn't work; it caused a Fatal Exception instead.
Fixed.
2006-06-21: release 1.4.25
* Motif version: now gets the selected items from the Export Program dialog
using the XmListGetSelectedPos() function, rather than using the
selectedPositionCount and selectedPositions resources; those resources are
a Motif 2.0 feature, and are not supported by the Lesstif library. With this
change, Export Program now works with Lesstif as well as with OpenMotif.
2006-06-19: release 1.4.24
* Under certain conditions, SOLVE would return not the final value in X, but
the previous one (which is also returned in Y). Fixed.
* Pocket PC version: now building the CAB files using the Cabwiz.exe from the
PPC 2002 SDK, instead of the PPC 2003 SDK. Hopefully this will fix the
problem of Free42 not installing properly on some PPC 2002 devices.
2006-06-09: release 1.4.23
* PalmOS version: fixed a bug that would cause reading the state file to fail
if there were no variables.
* GTK version: the position of the print-out window would not be remembered if
it was closed when the application exited. It appears that the
gtk_window_get_position() function returns the original postition (from the
window's geometry hints) if it is called while the window is not mapped.
I'm now working around this by making sure I get the window position while
the print-out window is actually mapped.
* Windows version: Show Print-Out did not work when the Print-Out window was
minimized. Fixed.
* Decimal version: changed the definition of POS_HUGE_PHLOAT and
NEG_HUGE_PHLOAT to have a mantissa with 25 nines, rather than 28. (These are
the numbers that are returned when a range error occurs while flag 24 is
set.)
* CLALL did not clear the CUSTOM menu and the programmable menu. Fixed.
* STO+, STO-, and STO/, where the destination was the indexed matrix, would
reset I and J, but that was wrong (only STO and STO* should do that, since
only they can actually cause the destination's dimensions to change).
This caused the MLR program from the HP-42S Programming Examples and
Techniques book to return incorrect results. Fixed.
* In HEXM and OCTM modes, SHOW should display X in decimal, but it showed it in
the selected base instead. On the real HP-42S, SHOW only shows the number in
base in BINM mode, and in decimal in all other modes. Fixed.
2006-05-22: release 1.4.22
* Decimal version: numbers are always rounded to 25 decimal digits now. The 7-
digit base-10000 representation, which Free42 uses internally, is equivalent
to 25 to 28 decimal digits, but the extra digits tend to introduce noise
which can interfere with the convergence tests of certain iterative numerical
algorithms. Rounding to 25 decimal digits makes Free42 behave like a regular
decimal calculator, preventing such problems.
* GTK version: explicitly realizes the print widget now, which prevents GTK
warnings being written to the console when print instructions are performed
before the print-out window is first opened.
2006-05-20: release 1.4.21
* Decimal version: for values < 1e-8, SQRT returned results that were a factor
10000 too large. This was due to a bug in the underlying BCDFloat::sqrt()
method, which probably affected other functions as well. Fixed.
2006-05-19: (no new code release)
* Added "HP-42C" voyager-style skins for Windows and Unix (Free42Skins.zip
package). Contributed by Egan Ford.
2006-05-11: release 1.4.20
* GTK version: added periodic battery check (once per minute). The other
versions already had this. Note that the GTK and Motif versions use /proc/apm
to inspect battery status; on systems without /proc/apm, this check does not
work, and the battery is assumed to always be OK. /proc/acpi support is not
implemented yet.
* All versions except PalmOS: the keyboard handling changes in release 1.4.17
broke auto-repeat from the PC keyboard. Fixed.
2006-05-08: (no new code release)
* HP-41 to HP-42S character code conversion in the rom2raw program did not
work; alpha LBL, GTO, XEQ, and string program lines were not converted.
Fixed, and updated the free42.tgz and rom2raw.zip packages.
2006-05-07: release 1.4.19