Copyright (C) 2012 Shawn Tan firstname.lastname@example.org. All Rights Reserved.
Released under LGPL3.
This project is a hardware implementation of the DCPU-16 microprocessor designed by Marcus Persson (@notch) for his new game 0x10c.
The core is written entirely in synthesisable Verilog RTL.
It has an 8-stage integer pipeline, split into two parts, each with 4-stages. Each stage can run within a single clock cycle. Therefore, the maximum effective rate for executing an instruction is 4-clock cycles.
- Fetch (FE) - fetches instructions from memory.
- Decode (DE) - decodes the instruction.
- Calc A (EA) - calculates the effective address for A.
- Calc B (EB) - calculates it for B.
- Load A (LA) - loads operand A.
- Load B (LB) - loads operand B.
- Execute (EX) - executes the instruction.
- Store A (SA) - stores operand A.
Currently synthesises on a Spartan 6 to about:
- 500 Slices @ 149 MHz
It is not FPGA proven, yet.