- https://efthimiskritikos.com/
- Joined on
2023-02-04
Block a user
acc0581124
Boot_code/BIOS: Split the litedram init off to a separate file and included the brainfuck compiler in the bios as a demo for the ram. Also added code to zero out the brainfuck data in the compiler
84be5eed67
Boot_code/BIOS: Split the litedram init off to a separate file and included the brainfuck compiler in the bios as a demo for the ram
2fcc521f12
Peripherals/Wishbone_memory: Rewrote the module to be more efficient, smaller and also support byte level addressing. It is correct enough now to run code out of!
dd1080b42c
Build system: Added maximum CPU frequency to build system info and improved the way nextpnr seed is handled, fixing builds with older versions of make
26210be950
Peripherals/I2C_driver: Corrected the implementation of the bidirectional SDA pin, fixing the final yosys 0.35 warning
0eecfdcf40
Tools/Gen_litedram: Major improvements and cleanup including work in ensuring it is reproducible
63ea29e399
Peripherals/Memory: Added support for the litedram DDR memory controller, created a new memory map and updated all relevant code and files including the addition of rudimentary wait state support for the cpu (BIU)
f1dc9d8a59
Processor/Instructions: Fixed a bug where if IN executed after a microcoded instruction the cpu would go into undefined behavior
f07e0e7c1f
Processor/Instructions: Added support for the IN <immediate> instruction. Also changed some stuff in system.v to add more devices in the IO/Memory space
17638d5cbd
Build system: Slight improvements, randomised nextpnr rng seed and printed it to the terminal. In case timing fails running it a bunch of times can yield one value that passes.
aedefddb5d
Project: The cpu finally works perfectly now even at full speed as far as i can tell! I made the ram and register writes synchronous which fixed the weird issues I had, then I added -abc9 to yosys so that nextpnr can actually route the cpu at full speed and increased the display fifo since the cpu is so fast now!!
98d30a1813
Project: removed a .fst.hier file thought to be generated by gtkwave and added the type to gitignore
09ccce5f30
Peripherals/HD44780: Rewrote and cleaned up a lot of the driver code. Unfortunately what i think is a very weird bug in yosys is still affecting the codebase
0ca1da81b1
Assembly code: Fixed a bug where the compiler would print a null byte which was masked by the verilog simulators
2c8e8a9d9c
Added simple support for \n and \r on the HD44780 driver, increased the synthesised mem to fit brainfuck_compiled.asm and made it the default.