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ALU.v
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01b9bb8f29
Added signed right shift operation to CPU, assembler, compiler, code and documentation.
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2 rokov pred |
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Arbiter.v
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88681ec5d0
New arbiter that further improves performance by removing latency for instruction memory access. Created instability again, which I found to be caused by bad interrupt timings. Fixed by changing the interruptValid wire to use branch_MEM for alignment. I do not know why this fixed all problems as it is very hard to simulate this issue. L1 cache should be possible again!
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1 rok pred |
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CPU.v
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2fe0518bb3
Improved interrupt timing/alignment, fixing bug where interrupts are not allowed during the UART bootloader.
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1 rok pred |
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ControlUnit.v
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7e81e7fa17
Added files missing from last commit (L1I cache).
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1 rok pred |
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DataMem.v
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207413dd90
Assembler only needs Int: function, fixed position of program lenght. Ported ROM and UART bootloader over from FPGC5. Updated documentation on interrupts. Added resets. Fixed bug in MU. Increased stack size. Tested everything in hardware. Probably some other fixes and things I forgot.
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2 rokov pred |
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InstrMem.v
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207413dd90
Assembler only needs Int: function, fixed position of program lenght. Ported ROM and UART bootloader over from FPGC5. Updated documentation on interrupts. Added resets. Fixed bug in MU. Increased stack size. Tested everything in hardware. Probably some other fixes and things I forgot.
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2 rokov pred |
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InstructionDecoder.v
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9f74a9565f
Fixed more MU I/O bugs. Updated everything from BCC except the ASM to work on new CPU. Added back flasher programs. Fixed LOAD/HI bug by using unsigned const16 instead. Updated assembler including hotfix for FPGC jumping to addr3 after UART bootloader is done. FPGC6 now basically fully works again!
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2 rokov pred |
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IntController.v
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207413dd90
Assembler only needs Int: function, fixed position of program lenght. Ported ROM and UART bootloader over from FPGC5. Updated documentation on interrupts. Added resets. Fixed bug in MU. Increased stack size. Tested everything in hardware. Probably some other fixes and things I forgot.
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2 rokov pred |
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Regbank.v
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28bcde6466
New SDRAM controller that uses both SDRAM chips. Now separate bus from MU for better performance, as controller runs at 100MHz. Also updated some debug code as debugging was needed. Tested working in hardware. 2x performance boost in some cases.
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1 rok pred |
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Regr.v
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302c69937e
Basic CPU design now done with afaik working hazard detection, forwarding and stalls. Tested in hardware on a EP4CE6 using two SSDisplays and dip switches to view the register content (and see if it matches the simulation). No interrupts yet as this can probably be done at a later stage.
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2 rokov pred |
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Stack.v
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207413dd90
Assembler only needs Int: function, fixed position of program lenght. Ported ROM and UART bootloader over from FPGC5. Updated documentation on interrupts. Added resets. Fixed bug in MU. Increased stack size. Tested everything in hardware. Probably some other fixes and things I forgot.
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2 rokov pred |
bart
2fe0518bb3
Improved interrupt timing/alignment, fixing bug where interrupts are not allowed during the UART bootloader.