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BCD calculators
08-19-2021, 12:36 AM (This post was last modified: 08-19-2021 12:38 AM by jte.)
Post: #7
RE: BCD calculators
(11-04-2020 12:41 AM)neyuru Wrote:  Hello all, …

Hello neyuru!

Quote:…first post here. By the way they handle arithmetic, physical calculators can (maybe?) be classified in broadly three groups:

  1. Hardware based BCD
  2. Software based BCD* (emulation)
  3. All binary arithmetic (converting only to decimal for display)

* although I’m not even sure if this is actually implemented, but is a possibility.

Myself, I’d place a bunch of BCD calculators in the “software-based” class.

Quote:Having an ASIC is not something a manufacturer usually conveys in its marketing, but I do appreciate a chip specifically designed to handle math operations in the way *most* humans do math. Some calculator models are known to have a BCD compliant microprocessor. Information on HP models is the easiest to find. Some modern calculators are based on ARM…

Where do FPGAs handling the floating-point calculations fit into this classification scheme? I’d generally place them more into a “hardware-based” class (depending, somewhat, on how much of the floating-point calculations are being handled directly by FPGA elements). Note that ARM / FPGA hybrids are currently available.
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Messages In This Thread
BCD calculators - neyuru - 11-04-2020, 12:41 AM
RE: BCD calculators - Claudio L. - 11-04-2020, 04:01 PM
RE: BCD calculators - Wes Loewer - 11-04-2020, 04:22 PM
RE: BCD calculators - firai - 11-05-2020, 03:34 PM
RE: BCD calculators - Claudio L. - 11-18-2020, 09:08 PM
RE: BCD calculators - jte - 08-19-2021, 12:04 AM
RE: BCD calculators - jte - 08-19-2021 12:36 AM
RE: BCD calculators - Paul Dale - 08-19-2021, 02:05 AM
RE: BCD calculators - jte - 08-25-2021, 12:26 AM
RE: BCD calculators - Paul Dale - 08-25-2021, 05:03 AM

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