https://de.oho.wiki/api.php?action=feedcontributions&feedformat=atom&user=Dennisatoho 2026-05-17T07:41:24Z Benutzerbeiträge MediaWiki 1.37.1 https://de.oho.wiki/index.php?title=MyNOR_-_Ein_diskret_aufgebauter_Einplatinencomputer_ohne_CPU_und_ALU&diff=22970 2021-03-03T18:45:09Z

<p>Dennisatoho: </p> <hr /> <div>{{Projekt<br /> |Images={{ProjektImages<br /> |projectimage=MyNOR_v1.5.jpg<br /> }}<br /> |subcat=Computer, Elektronik## Computer<br /> |projectname=MyNOR - Ein diskret aufgebauter Einplatinencomputer ohne CPU und ALU<br /> |projectnameEN=MyNOR - A discrete single board computer without CPU and ALU<br /> |projectnameES=MyNOR - Un ordenador discreto de placa única sin CPU ni ALU<br /> |kewords=CPU, MCU, SBC, ALU, TTL, 74HC, MyNOR, MyCPU, discrete, computer, homebrew<br /> |firstin=http://www.mynor.org<br /> |trans_status=MT<br /> |desc=MyNOR is a single board computer that does not have a CPU. Instead, the CPU consists of discrete logic gates from the 74HC series. This computer also has no ALU. Only a single NOR gate is used to perfom all computations such as addition, subtraction, AND, OR and XOR. This computer is not fast, it is rather slow. MyNOR can only perform 2600 8-bit additions per second, although it is clocked at 4 MHz. This is because everything is done in software. MyNOR has only a 32 kB ROM for program storage, but this is more than enough. The very slim microcode occupies only 9 kB, the remaining 23 kB are used for the application program.<br /> |licence=CCBYSA40<br /> |typeproject=Web<br /> |project_status=active<br /> |maturity=PRD<br /> |electronic_files_pub=yes<br /> |electronic_files_editable=no<br /> |electronic_license=CCBYSA40<br /> |software_files_pub=yes<br /> |software_files_editable=no<br /> |software_license=GNUGPL3<br /> |assembly_inst_pub=yes<br /> |assembly_instructions_link=http://mynor.org/downloads.htm<br /> |assembly_instructions_editable=no<br /> |bill_materials_pub=yes<br /> |bill_materials_link=http://mynor.org/downloads.htm<br /> |bill_materials_editable=no<br /> |contributing_guide_pub=yes<br /> |contrubuting_guide_link=http://mynor.org/boards-mynor.htm<br /> |contains_pdf_drawings=yes<br /> |techdata=Technical data of the computer board:<br /> No CPU or MCU, no ALU, only one discrete NOR gate for computations<br /> The 8-bit CPU is made of 15 CMOS logic chips, 2 transistors, a ROM and a RAM chip<br /> additional 4 CMOS logic chips are used to provide digital I/O<br /> 8 kB SRAM for CPU registers, program code and data<br /> 32 kB ROM (OTP EPROM) for microcode and program storage<br /> 64 kB EEPROM for 8 user programs, with auto-boot after power on<br /> 4 MHz CPU clock, can be increased to 8 MHz if chips allow this speed<br /> The CPU is able of doing up to 2600 8-bit additions per second at 4 MHz CPU clock<br /> Hardware interrupts (except the non-maskable hardware reset) are not supported<br /> A stack memory of 256 byte enables nested subroutine calls<br /> Up to 24 digital outputs and 8 digital inputs with integrated pull-up's<br /> RS232 interface with 2400 baud @ 4 MHz or 4800 baud @ 8 MHz<br /> I2C and SPI interfaces to connect peripherals<br /> Slim microcode architecture with 28 instructions<br /> The microcode occupies only 9 kB of the ROM, 23 kB are free for the OS<br /> The Operating System provides lots of useful API functions<br /> The OS contains a calculator program that can do floating point calculations<br /> The OS contains a monitor program which allows directly programming MyNOR in assembly<br /> Software-upload is done via &quot;copy-and-paste&quot; of text-files into the terminal window<br /> Vintage design that uses only through-hole components on a board with a size of 130x100 mm<br /> Hardware simulator for Linux and (with limitation) for MS Windows available<br /> Cross-Assembler for Linux and MS Windows available<br /> |certificate_requested=Nein<br /> }}</div>

Dennisatoho https://de.oho.wiki/index.php?title=MyNOR_-_Ein_diskret_aufgebauter_Einplatinencomputer_ohne_CPU_und_ALU&diff=22969 2021-03-03T06:24:29Z

<p>Dennisatoho: Die Seite wurde neu angelegt: „{{Projekt |Images={{ProjektImages |projectimage=MyNOR_v1.5.jpg }} |subcat=Computer, Elektronik## Computer |projectname=MyNOR - Ein diskret aufgebauter Einplati…“</p> <hr /> <div>{{Projekt<br /> |Images={{ProjektImages<br /> |projectimage=MyNOR_v1.5.jpg<br /> }}<br /> |subcat=Computer, Elektronik## Computer<br /> |projectname=MyNOR - Ein diskret aufgebauter Einplatinencomputer ohne CPU und ALU<br /> |projectnameEN=MyNOR - A discrete single board computer without CPU and ALU<br /> |projectnameES=MyNOR - Un ordenador discreto de placa única sin CPU ni ALU<br /> |kewords=CPU, MCU, SBC, ALU, TTL, 74HC, MyNOR, MyCPU, discrete, computer, homebrew<br /> |firstin=http://www.mynor.org<br /> |trans_status=MT<br /> |desc=MyNOR is a single board computer that does not have a CPU. Instead, the CPU consists of discrete logic gates from the 74HC series. This computer also has no ALU. Only a single NOR gate is used to perfom all computations such as addition, subtraction, AND, OR and XOR. This computer is not fast, it is rather slow. MyNOR can only perform 2600 8-bit additions per second, although it is clocked at 4 MHz. This is because everything is done in software. MyNOR has only a 32 kB ROM for program storage, but this is more than enough. The very slim microcode occupies only 9 kB, the remaining 23 kB are used for the application program.<br /> |certificate_requested=Nein<br /> }}</div>

Dennisatoho