diff --git a/README.md b/README.md index bcd8fa1..036c417 100644 --- a/README.md +++ b/README.md @@ -6,12 +6,11 @@ PicoRV32 is a CPU core that implements the [RISC-V RV32IMC Instruction Set](http It can be configured as RV32E, RV32I, RV32IC, RV32IM, or RV32IMC core, and optionally contains a built-in interrupt controller. -Tools (gcc, binutils, etc..) can be obtained via the [RISC-V Website](https://riscv.org/software-status/). -The examples bundled with PicoRV32 expect various RV32 toolchains to be installed in `/opt/riscv32i[m][c]`. See -the [build instructions below](#building-a-pure-rv32i-toolchain) for details. Many Linux distributions now include the tools for RISC-V (for example Ubuntu 20.04 has `gcc-riscv64-unknown-elf`). To compile using those set `TOOLCHAIN_PREFIX` accordingly (eg. `make TOOLCHAIN_PREFIX=riscv64-unknown-elf-`). +Alternatively, see the [build instructions below](#building-a-pure-rv32i-toolchain) +to build the toolsfrom source. PicoRV32 is free and open hardware licensed under the [ISC license](http://en.wikipedia.org/wiki/ISC_license) (a license that is similar in terms to the MIT license or the 2-clause BSD license).