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Nav48 - Rally Terratrip

01 Jan 2004

Reading time ~1 minute

Technologies

  • Motorola 68HC908: Firmware developed in assembler on a Motorola MC68HC908GP32 with a few code on C.
  • CodeWarrior: IDE, compiler, debugger and in-circuit programming.
  • Hp48: Navigation software using a Hewlett Packard Hp48 interfaced via Serial connection.
  • Jazz library: Low level IDE, compiler and debugger for SysRPL and Hp48 Saturn CPU assembler

Target

Rally computer for amateur and professional rally teams. Using a Hp48 calculator, the rally team enter the race variables and the software give the next information:

  • Current position, from odometer interfaced from car to hardware device with a switch sensor or hall effect sensor.
  • Target position, calculated for keep car synced.
  • Distance offset, calculated from current position and race data.
  • Current track, from race information.
  • Multiple time mode, track time, race time, start and end time, etc.

Nav48 app

Hewlett Packard Hp48 application Nav48 screenshots

Source code

Unfortunately I lost the source code directory, but in 2025 I found some things. Right now this data archeology and forensic tasks will be here:

https://github.com/hpsaturn/nav48

Nav48 Hardware

Nav48 hardware photos

Awards

With this hardware and software that I did, my team won around 8 trophies and two championship on Bogotá on three years in two modalities, 4x4 and regularity.


AssemblerC++IoTHp48HardwareMotorola Tweet Report Issue