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557d160be6
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did some cleanup relating to the generation of the VALID_INSTRUCTION signal
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2023-11-01 05:00:09 +00:00 |
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3a63e916f5
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Added cycles to waveform capture for icarus verilog
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2023-10-31 19:32:35 +00:00 |
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49335a2c2f
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Fixed a small bug in log generation and did some cleanup
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2023-10-31 19:01:34 +00:00 |
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8a62b89a13
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Fixed small bug with json data reporting and improved slightly the graphs
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2023-10-30 08:01:03 +00:00 |
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d151435ac1
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Removed redundant checks for enabled early instruction detection in BIU
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2023-10-23 02:30:25 +01:00 |
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ced03c48d6
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Added cache flush after write, potentially fixing support for self modifying code
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2023-10-23 02:09:13 +01:00 |
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8d3b54b812
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Small change from when I last worked on this and an update to the versions on the README
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2023-10-21 18:38:50 +01:00 |
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42c319d55d
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Lots of cleanup mainly on processor.v
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2023-06-01 02:13:55 +01:00 |
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a693b87e96
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General cleanup and moved the reading of instruction parameters from a separate stage in execute to circuitry during the decode
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2023-05-29 02:29:15 +01:00 |
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af63ef1d68
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Moved the decoder logic to decoder.v Now processor.v only connects the different modules
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2023-05-27 23:35:00 +01:00 |
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d2a98c02ff
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Removed duplicate code and improved microcode entry
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2023-05-27 17:59:52 +01:00 |
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79d598fc64
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Changed slogan and cleaned up some small pieces of code
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2023-05-23 16:18:33 +01:00 |
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0bf00df07c
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Fixed clock cycle and instruction counter overflow
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2023-05-23 09:27:46 +01:00 |
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e74d73ed58
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Added reporting of branches on the stat json files and improved the plotting script
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2023-05-21 03:00:27 +01:00 |
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3dd2ff59ea
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Added 2 more test programs, 2 new instructions and fixed a bug in CMP
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2023-05-21 01:48:50 +01:00 |
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021dd06e9a
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Added support for some more instructions, fixed a bug in CMP and also added a program that uses them
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2023-05-19 17:59:20 +01:00 |
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1b510e4781
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Made the size of the cache variable
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2023-05-18 11:21:27 +01:00 |
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7db70d79ff
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Made execute unit start at a state transition of a signal from the decoder thus allowing for an IPC of 0.99 !!
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2023-05-17 21:30:21 +01:00 |
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90f63b525d
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Made the decode unit able to continuously decode (simple) instructions if BIU allows it
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2023-05-17 20:09:38 +01:00 |
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30c3deca37
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Made the execute unit signal the end of execution by a state change rather than the state of a signal to allow for one cycle instructions
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2023-05-17 11:05:20 +01:00 |
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53e9d371d7
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Fully optimised BIU. Now it can instantly deliver instructions back to back
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2023-05-16 18:07:28 +01:00 |
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f914d1ec8f
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Cleaned up processor.v a bit
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2023-05-16 16:29:48 +01:00 |
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97912b1a29
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Fixed bug found by icarus verilog and added outdated notice to README
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2023-05-16 13:59:16 +01:00 |
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bfa576e2a0
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Cleaned up the interface between BIU and the processor
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2023-05-16 13:33:08 +01:00 |
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07d2a80b2e
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Added code to record statistics and a tool to plot them
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2023-05-14 16:06:33 +01:00 |
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df342467c7
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Saved a clock cycle from microcode starts and added info in decode to allow saving a cycle on almost every instruction
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2023-05-13 13:45:15 +01:00 |
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00aa828ddc
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Improved parallelism
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2023-05-13 10:52:44 +01:00 |
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fe0426a77b
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Made execute unit run in parallel with everything else. Still not parallel for most of the time though
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2023-05-13 06:51:35 +01:00 |
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7151d5634f
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Fixed bug that prevented Icarus Verilog from simulating correctly
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2023-05-11 19:55:47 +01:00 |
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539fb8416b
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Fixed copyright notices, did some major cleanup and bumped README's versions
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2023-05-11 16:28:10 +01:00 |
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a8ab6b2dc7
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Separated the execution unit from decode
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2023-05-11 12:22:49 +01:00 |
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7724e5f383
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Removed deprecated BIU_NEXT_POSITION
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2023-05-10 08:53:29 +01:00 |
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e4ef199b83
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Fixed a memory corruption bug
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2023-05-10 08:35:14 +01:00 |
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7e612bb701
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made BIU snoop into the processor to deliver new instructions faster and fixed some bugs
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2023-05-10 08:31:14 +01:00 |
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c854818d6d
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Tightened up write timing
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2023-05-10 04:43:09 +01:00 |
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b7bfbd4e33
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Improved BIU performance and debug messages
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2023-05-10 04:05:56 +01:00 |
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da51dd6da7
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First draft of a bus interface unit in an effort to make the CPU pipelined. Currently supports code prefetching
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2023-05-07 13:34:15 +01:00 |
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f4b22951d0
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Cleaned up some pieces of code and fixed a bug
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2023-05-04 00:49:04 +01:00 |
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bd7610879f
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Removed erroneous file and run aspell
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2023-03-21 14:51:39 +00:00 |
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2f9a8fa236
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Improved DOS char print code
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2023-03-14 07:20:30 +00:00 |
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82baacfd5b
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Fixed race condition giving garbage data on debug register write prints and ordering of reg write and instr fetch debug prints
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2023-03-12 08:55:40 +00:00 |
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9230900b75
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fixed verilator lint warnings relating code enabled with debug options from config.v
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2023-03-12 08:12:01 +00:00 |
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aabe62b4c9
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Added missing copyright and license notice
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2023-03-09 06:13:34 +00:00 |
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11624ca2d2
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Added the OUT instruction to be able to properly address I/O and moved printing logic to a device on the I/O space. Also added IRET which is basically just a RET in this case
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2023-03-09 06:03:13 +00:00 |
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9de83fd7c1
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Added partial support for the software interrupt INT instruction
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2023-03-08 07:26:28 +00:00 |
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8070d4e58a
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Improved build system's handling of verilator
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2023-03-05 23:11:18 +00:00 |
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99cbc49e95
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Wrote a more complete testbench for verilator, switched from lx2 to fst and fixed cpu clock frequency calculation
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2023-03-05 00:10:55 +00:00 |
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5705b8e8a5
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Added support for Verilator!
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2023-03-04 08:37:43 +00:00 |
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ba52ff89e6
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Fixed most problems verilator's linter found
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2023-03-04 06:22:28 +00:00 |
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59ec1b7a15
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Removed remnants of the old memory addressing system
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2023-03-03 20:43:25 +00:00 |
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