HP-39g series
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "HP-39g_series".

HP-39g series calculators are the successors of HP-38G.

There are five calculators in the 39 series of HP graphing calculators. These calculators have algebraic entry modes, and can perform numeric analysis together with varying degrees of symbolic calculation. All calculators in this series are aimed at high school level students and are characterised by their ability to download (via cable or infra-red) APLETs or E-lessons. These are programs of varying complexity which are generally intended to be used in the classroom to enhance the learning of mathematics by the graphical and/or numerical exploration of concepts. Some hundreds of these can be found on various websites.

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HP-39G

HP-39g was released in 2000.

Basic characteristics

HP-40G

HP-40g was released in 2000 in parallel with the HP-39g. The HP-40G's operating system is identical to the HP-39G. Differences detected in hardware during start-up trigger the differences in software functionality.

Basic characteristics

  • Identical to HP-39G except:
  • Communication: No infrared communication, Serial RS-232 (Serial port).
  • Software: Includes an equation writer and advanced CAS.

HP-39g+

HP 39g+

HP-39g+ was released in September, 2003.

Basic characteristics

  • CPU: 75 MHz ARM9
  • Communication: USB port (using the Kermit or XModem protocols), IrDA (infrared).
  • Memory: 256 KB
  • Power: 3*AAA as main power, CR2032 for memory backup
  • Screen resolution: 131×64 pixels
  • Limited symbolic equation functionality.

Note: Although an ARM processor is used in this model, the operating system is substantially the same as that of the 39G, with the Saturn chip being emulated on the ARM at a higher speed than was possible for the 39G. The CAS component of the HP-40G's operating system appears to have been totally removed, rather than simply being hidden at start-up.

HP-39gs

HP-39gs was released in Jun, 2006.

Basic characteristics

  • CPU: 75 MHz ARM9
  • Communication: USB port (using the Kermit or XModem protocols), IrDA (infrared), 4-pin asynchronous Serial port (not RS232 voltage levels) using a serial cable with a 4-pin mini-USB connector.
  • Power: 4*AAA as main power, CR2032 for memory backup
  • Screen resolution: 131×64 pixels
  • Includes a hard cover
  • Limited symbolic equation functionality.
  • Flash memory to allow potential future upgrades/bug fixes.

Note: Although an ARM processor is used in this model the operating system is substantially the same as that of the 39G, with the Saturn chip being emulated on the ARM at a higher speed than was possible for the 39G.

HP-40gs

HP-40gs was released in mid-2006.

Basic characteristics

  • Identical to HP-39gs except:
  • Communication: No infrared communication.
  • Software: Includes an equation writer and advanced CAS.
  • Memory: Flash memory is larger. This is necessary to accommodate the CAS software.

External links
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