With the availability of free and open source C C++ compilers today you might wonder why
someone would be interested in assembler language. What is so compelling about the RISC-V
Instruction Set Architecture (ISA)? How does RISC-V differ from existing architectures? And
most importantly how do we gain experience with the RISC-V without a major investment? Is
there affordable hardware available? The availability of the Espressif ESP32-C3 chip provides a
way to get hands-on experience with RISC-V. The open sourced QEMU emulator adds a 64-bit
experience in RISC-V under Linux. These are just two ways for the student and enthusiast alike
to explore RISC-V in this book. The projects in this book are boiled down to the barest
essentials to keep the assembly language concepts clear and simple. In this manner you will
have aha! moments rather than puzzling about something difficult. The focus in this book is
about learning how to write RISC-V assembly language code without getting bogged down. As you
work your way through this tutorial you'll build up small demonstration programs to be run and
tested. Often the result is some simple printed messages to prove a concept. Once you've
mastered these basic concepts you will be well equipped to apply assembly language in larger
projects.
