コミット履歴

作者 SHA1 メッセージ 日付
  bart 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! 2 年 前
  bart 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. 2 年 前
  bart 69e83fb855 Fully implemented interrupts in verilog. Return address appears to work fine, but might need some further testing for different delays in the pipeline. 2 年 前
  bart e493a27ab4 Started on interrupts. Triggering seems to work, reti still needs to be implemented 2 年 前
  bart b74702c915 Created full FPGC6 verilog simulation, added Quartus code from FPGC5 with CPU from FPGC6. Works in hardware, but has combination loop somewhere at the arbiter and the registerbank and stack are not using block ram 2 年 前
  bart 9662964536 Added back scripts for converting to spi.txt. Tested code to run from SPI flash, fixed cycle delay for SPI flash in output latch in MU which caused the bus_q to arrive a cycle later than bus_done. 2 年 前
  bart f5bc168700 Added DataMem to MU via Arbiter, fixed several bugs while doing this. Works with test code, but will most likely still contain bugs in certain cases. 2 年 前
  bart 0e533922fb Connected instruction memory to the MU via the arbiter 2 年 前
  bart 6881f1be1d Found bug where the next instruction after READ/WRITE is skipped if DataDelay but no InstrDelay 2 年 前
  bart e8bc85adb6 Data memory now works with variable delays without breaking the pipeline 2 年 前
  Bart fb0e4b363f Instruction memory can now have a delay without messing up the pipeline 2 年 前
  Bart 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. 2 年 前
  Bart 3714a90401 Forwarding now also works for data memory and also probably branches and other MEM operations. Fixed a bug in forwarding where EX was used instead of WB 2 年 前
  Bart e5dd555fdb Register forwarding now works for ALU operations, (memread getintid and savpc still needs forwarding). Regbank is simplified because no need for we_high anymore, load and loadhi are now done using an ALU operation. 2 年 前
  Bart 9da01544e7 Jump flush now seems to work. Made simple Quartus project to test in hardware and it seems to work fine there as well 2 年 前
  Bart a76e895a39 Started working on the CPU pipeline. Basic load, arith and jumps seem to work now. No hazard handling yet. 2 年 前
  Bart 55f619efae Initial commit with some empty Verilog template code from FPGC5 2 年 前