Support the SD drive emulation in QEMU.

Support the official QEMU and the official GNU C compiler.

Support the mriscv open-sourced processor in System Verilog.

Improve the use of types and the assembly code for trap entry.

Add support for the Arty S7-50 and Arty A7-100t boards.

Add the non-preemptive multi-threading project to apps/user.

Add support for the processor from ECE4750 which is a pipelined RISC-V processor in Verilog.

Add skeleton code for the page table translation project.

Separate the code of paging device from the code of memory management.

Cleanup the code and improve the documents.

Add QEMU support so that the Arty board becomes optional.

Add page table translation with the help of QEMU.

Add tutorial video for MacOS users.

Add tutorial video for Windows users.

Add skeleton code for memory protection and exception project.

Remove RISC-V extensions mac from compiler flag so that egos-2000 only uses the basic rv32i, making it easier to run on students' own processor design.

This is the initial release of egos-2000 before receiving comments and suggestions from the public.

Please refer to references/USAGES.md for programming the bootROM to the Arty board and the disk image to the microSD card.