12-11-2019
Here is a copy of the Amazon review I wrote for this Casio PRIZM FX-CG50:
Quote:
As an electrical engineer who works in software engineering, I have used a lot of calculators. The Casio PRIZM FX-CG50 does not have a nice feel in my hands at all. In fact, it feels rough and unrefined, bulky and cheap. I think the design is way too thick, perhaps because of the decision by Casio to run device this on four AAA batteries?
Anyway, I don't like the design in the least (for the money paid). The keyboard is hard to read, the contrast between the functions and the black background is poor, perhaps by design; so this device it is not for me. I also do not like how the FX-CG50 handles errors.
The documentation provided and the PDF online is very poor. Thank goodness for YouTube tutorials (but others, not Casio); but you would think that Casio could create their own very good tutorials; but no they cannot.
The macOS firmware upgrade software for the PRIZM FX-CG50 only works on High Sierra, which is two major releases back. All my main macs run Catalina (I own four Macs, including a 12 core Mac Pro from 2013, a Mac Mini and two MacBook Airs), so you cannot upgrade the PRIZM FX-CG50 software on three of those those four machines. The "good news" is that do happen to have an obsolete MacBook Air (very old MBA) which cannot upgrade past High Sierra, so I had to use that obsolete MBA from my closet to upgrade the firmware! Why Casio only supports High Sierra and not Mojave or Catalina is a total mystery to me! I guess Casio simply does not care about firmware upgrade software for macOS.
If I paid $25 bucks for this, I might expect less; but for the money, I realize I should not have bought this. The Casio PRIZM FX-CG50 is not recommended at all. Sorry to be truthful and honest.
PS: The way the Casio PRIZM FX-CG50 runs Python is not impressive at all.
Last edited by hicksd8; 12-11-2019 at 09:14 AM..
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LEARN ABOUT DEBIAN
sbuild-update
SBUILD-UPDATE(1) Debian sbuild SBUILD-UPDATE(1)
NAME
sbuild-update - update, upgrade, and clean an sbuild chroot with apt-get
SYNOPSIS
sbuild-update [-h|--help] [-V|--version] [--arch=architecture] [-u|--update] [-g|--upgrade] [-d|--dist-upgrade] [-c|--clean] [-a|--auto-
clean] [-r|--autoremove] CHROOT1 [CHROOT2 [CHROOTn...]]
sbuild-update -k|--keygen
(DEPRECATED) sbuild-upgrade [-h|--help] [-V|--version] CHROOT1 [CHROOT2 [CHROOTn...]]
(DEPRECATED) sbuild-distupgrade [-h|--help] [-V|--version] CHROOT1 [CHROOT2 [CHROOTn...]]
(DEPRECATED) sbuild-clean [-h|--help] [-V|--version] [-c|--clean] [-a|--autoclean] [-r|--autoremove] CHROOT1 [CHROOT2 [CHROOTn...]]
DESCRIPTION
sbuild-update runs apt-get inside the specified chroot performing update, upgrade, dist-upgrade, clean, autoclean, and/or autoremove
depending on the options specified on the command line.
sbuild-upgrade, sbuild-distupgrade, and sbuild-clean, are deprecated. They now simply run sbuild-update with the appropriate options
(--upgrade or --dist-upgrade for sbuild-upgrade or sbuild-distupgrade respectively) along with whatever arguments were passed in the
scripts.
OPTIONS
Actions
-h, --help
Display this manual.
-V, --version
Print version information.
--arch=architecture
Update chroot for the architecture specified.
-u, --update
Perform an apt-get update.
-g, --upgrade
Perform an apt-get upgrade.
-d, --dist-upgrade
Perform an apt-get dist-upgrade.
-c, --clean
Perform an apt-get clean.
-a, --autoclean
Perform an apt-get autoclean.
-r, --autoremove
Perform an apt-get autoremove.
-k, --keygen
Generate a GPG public/private key pair for self-signing local apt archives, used for installation of dependency packages. Note that
this requires a significant amount of entropy (randomness) and may hang on systems with poor entropy sources, such as headless sys-
tems without direct user input. In this situation, it is advisable to create the key on a trusted local system, and copy the files
to the build system by hand from /var/lib/sbuild/apt-keys/.
Chroot selection
CHROOT The chroot to use. Note that 'o', 's', 't', 'u' and 'e' may be used as abbreviations for 'oldstable', 'stable', 'testing', 'unsta-
ble' and 'experimental', respectively.
EXAMPLES
To update the unstable chroot:
% sbuild-update --update unstable
To upgrade the unstable chroot:
% sbuild-update --upgrade unstable
To clean the unstable chroot:
% sbuild-update --clean unstable
To perform an update, dist-upgrade, clean, autoclean, and autoremove for the unstable chroot:
% sbuild-update -udcar unstable
AUTHORS
Roger Leigh.
Andres Mejia.
COPYRIGHT
Copyright (C) 2006-2009 Roger Leigh <rleigh@debian.org>.
Copyright (C) 2010 Andres Mejia <mcitadel@gmail.com>.
SEE ALSO
sbuild(1), sbuild-apt(1),
Version 0.63.2 18 Aug 2012 SBUILD-UPDATE(1)