There are 3 repositories under soft-core topic.
An AXI4-based DDR1 controller to realize mass, cheap memory for FPGA. 基于FPGA的DDR1控制器,为低端FPGA嵌入式系统提供廉价、大容量的存储。
QNICE-FPGA is a 16-bit computer system for recreational programming built as a fully-fledged System-on-a-Chip in portable VHDL.
Basic UART TX/RX module for FPGA
An open-source 32-bit RISC-V soft-core processor
Open source ISS and logic RISC-V 32 bit project
A pipelined, in-order, scalar VHDL implementation of the MRISC32 ISA
LatticeMico32 instruction set simulator project
Soft core with support for the AVR8 instructions on verilog
SRP16 is free and open ISA for 16-bit CPUs and Microcontrollers.
A study of soft-core CPUs for use with FPGA designs
Implementation of MIPS Processor Modules Using Verilog