8/1/2023 0 Comments Free42 android app![]() It can then route up to 512 KB of “normal” RAM or better 1 MB of nibbles ArchitectureĪ-D - 4 generic 64bit registers (GPR- General PuRpose registers that are sophisticatedly structured) The Saturn routes 5 nibbles (20bits) and is based on 4bit serial buses. ![]() It is a chip common to all HP calculators of the time. The operating system of the HP42S (64KB ROM) is also derived from the previous calculators.Īt one point (in 2003) HP implemented a Saturn emulator with an ARMv4 chip as Samsung could no longer produce it (!) with its factories. Of course, the ARMv4 also came out of production and therefore the Saturn architecture was officially abandoned around 2015, when the HP Prime was born which can be found around 150 € and still contains the RPN system with reverse Polish logic, much loved by admirers of HP calculators (myself included). The HP 42S uses a chip called Saturn (at 1Mhz) that thinks internally at 4bit (nibble) but has 64bit registers (here you will find a somewhat elementary manual, poorly written but at least lists all the instructions of Saturn). The hardware design is truly refined, and the processor is able to operate natively with the required precision (and this can be seen from its computational speed). There is a new implementation based on the open source Free42 (DM42) software but it costs a huge amount, more than the HP Prime which is the latest version of this generation of calculators. matrices, complex numbers, dry text, etc.) and provides everything you need for a general-purpose engineer (numerical integrations, solvers, etc.). The HP 42S is quite easy to use, allows you to use mixed data types (e.g. It still works, and lately I have discovered that it has an internal “monitor” and the ability to set a “FAST” mode. I risked losing her towards the penultimate year of University, but the fate (and honesty of a colleague of mine) brought her back to me. ![]() I bought it on December 5, 1992, paying it 229,000 lire, a year before I started university (about 200€ now considering inflation * ). The HP 42S accompanied me throughout my university career, secretly designed for me some function graphs and with its 7KB alphanumeric also managed to make me keep some secret notes. ![]()
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