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HP calculator museum: HP48s/sx Graphing Calculator, 1990

HP calculator museum: HP48s/sx Graphing Calculator, 1990

The HP-48 is a series of graphing calculators using Reverse Polish notation (RPN) and the RPL programming language, produced by Hewlett-Packard (HP) from 1990 until 2003. The series include the HP-48S, HP-48SX, HP-48G, HP-48GX, and HP-48G+, the G models being expanded and improved versions of the S models. The models with an X suffix are expandable via special RAM (memory expansion) and ROM (software application) cards. In particular, the GX models have more onboard memory than the G models. The G+ models have more onboard memory only. The SX and S models have the same amount of onboard memory.

Specifications

  • CPU clock frequency: 2 MHz
  • Memory clock frequency: 2 MHz
  • CPU codename: Clarke
  • Communication Protocol(s): Serial Transfers: Kermit (protocol); Infrared Transfers: proprietary
  • On-board ROM: 256 KB
  • On-board RAM: 32 KB
  • Maximum additional memory per expansion card: 128 KB (SX only)
  • ROM versions: A, B, C, D, E, J

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I worked with various Insurances companies across Switzerland on online applications handling billion premium volumes. I love to continuously spark my creativity in many different and challenging open-source projects fueled by my great passion for innovation and blockchain technology.In my technical role as a senior software engineer and Blockchain consultant, I help to define and implement innovative solutions in the scope of both blockchain and traditional products, solutions, and services. I can support the full spectrum of software development activities, starting from analyzing ideas and business cases and up to the production deployment of the solutions.I'm the Founder and CEO of Disruptr GmbH.

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