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| 1 | +LatticeMico32 |
| 2 | +============= |
| 3 | + |
| 4 | +LatticeMico32 is a soft processor originally developed by Lattice |
| 5 | +Semiconductor [1]. It was released under an open IP core license. |
| 6 | + |
| 7 | +This is a fork of the original sources distributed by Lattice. It includes |
| 8 | +new features, bugfixes and support for other FPGA devices. All additional |
| 9 | +features are BSD-licensed. |
| 10 | + |
| 11 | +Please note that this is only the processor core, not a complete SoC. |
| 12 | + |
| 13 | + |
| 14 | +Original Features |
| 15 | +================= |
| 16 | + |
| 17 | + * 32-bit RISC architecture |
| 18 | + * Six stage pipeline |
| 19 | + * Two Wishbone bus interfaces for instruction and data |
| 20 | + * 32 external interrupts |
| 21 | + * 32 general purpose registers |
| 22 | + * Instruction and data caches |
| 23 | + * Embedded instruction ROM and data RAM support |
| 24 | + |
| 25 | + |
| 26 | +Added Features |
| 27 | +============== |
| 28 | + |
| 29 | + * MMU support |
| 30 | + * Non-privileged user-mode support |
| 31 | + * JTAG support for Xilinx Spartan-6 devices |
| 32 | + * Test bench (using Icarus Verilog [3]) |
| 33 | + * Replaced device specific primitives with generic verilog modules |
| 34 | + * Unit tests shared with QEMU |
| 35 | + |
| 36 | + |
| 37 | +Reference Manual |
| 38 | +================ |
| 39 | + |
| 40 | +You can find the reference manual at [2]. |
| 41 | + |
| 42 | + |
| 43 | +Getting Started |
| 44 | +=============== |
| 45 | + |
| 46 | +This repository provides all you need to simulate programs with the system |
| 47 | +test bench. Try it, by typing |
| 48 | + make sim_hello_world |
| 49 | +in the test/ directory. |
| 50 | + |
| 51 | +For an example of a larger project which uses this core, see MiSoC [4]. |
| 52 | + |
| 53 | + |
| 54 | +References |
| 55 | +========== |
| 56 | + |
| 57 | +[1] http://www.latticesemi.com |
| 58 | +[2] http://www.latticesemi.com/documents/doc20890x45.pdf |
| 59 | +[3] http://iverilog.icarus.com |
| 60 | +[4] http://github.com/milkymist/misoc |
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