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ArduZ80
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The first Z80 emulation library for Arduino
Download README (.md)
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ArduZ80
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# ArduZ80 The first Z80 emulation library for Arduino, bringing back the old Z80 to life. **Now Available on the Arduino LibraryManager & [Arduino Playground](http://playground.arduino.cc/Code/ArduZ80)** # Introduction Studying microprocessors for a semester project, I had to write an emulator, and I chose Z80 to be my study case. my project had to be in arduino, so the emulator itself must run on arduino, I searched the internet and no working project or library where found for Z80 to emulate it on arduino, I decided to write my own library and emulator system and revive the Z80 through Arduino, it was a great processor for hobbyists and students and very good to study computer architeture on it. # Zilog Z80 The Z80 microprocessor is an 8 bit CPU with a 16 bit address bus.<br/> It has a language of 252 root instructions and an additional 308 instructions.<br/> The Z80 was modeled after the 8080 and contains the 78 opcodes of 8080 opcodes as a subset to it's language.<br/> Programming features include an accumulator and six eight bit registers that can be paired as Three 16 bit registers.<br/> In addition to the general registers, a stack-pointer, program-counter, and two index (memory pointers) registers are provided.<br/> # Features - Interpretation-Based. - Written and optimized for Arduino.<br/> - Tested on Arduino Nano, Uno, Mega.<br/> - ALU, Buses, Registers, Control Unit emulated.<br/> - Emulates 260 Instructions (177 Basic Instructions, 83 Extended Instructions).<br/> - Implementation of IN and OUT instruction left for developer to customize his system.<br/> - built with customization and extensibility in mind, adding a new instruction takes 3 lines only.<br/> # Usage Step 1: //Make an array to hold the program uint8_t t[30] = { EXT_FD, FD_LD_A_imm, 0x00, EXT_DD, DD_LD_B_imm, 0x09, EXT_DD, DD_LD_C_imm, 0x03, XOR_A_B, XOR_A_C, XOR_A_imm, 0xFF, NOP }; Step 2 : //Copy the program to RAM for (int i = 0; i < 30; i++) { cpu.ram_[i] = t[i]; } Step 3 : //Run the CPU cpu.run_to_nop(true); Step 4 (Optional) : //Implement write_io and read_io void ArduZ80::write_io(uint16_t addr, uint8_t val){ } uint8_t ArduZ80::read_io(uint16_t addr){ return data; } # Credits - Sijmen Smulder for his C++ emulator, helped as a base for my Arduino version.<br/> - Gabriel Gambetta for his C library, helped to understand some instructions and tweak emulator.<br/> # License This library is signed under MIT License, Reproduce under it's terms.
