| Rev |
Log message |
Author |
Age |
Path |
| 29 |
Well, added a testcase for testing the ALU bitwise operations and found a very large problem.
I'm pretty sure that the decoder needs to be partially unclocked because it essentially makes the ALU clocked how it is now, which is very bad. |
earlz |
4432d 04h |
/tinycpu |
| 28 |
Ok now registerfile is correct. Only using rising_edge. Now DataOut is the same as DataIn when WriteEnable is asserted.
Some of my tests had to be changed because I was expecting the DataOut to be updated 1 clock cycle after the instruction rather than on the same clock cycle.
Now it's truly single-cycle and without all the weird regIn stuff on the carryovers |
earlz |
4432d 23h |
/tinycpu |
| 27 |
Added a few ALU opcodes and came across a weird propogation delay issue with my registerfile.
As a workaround, I'm trying to use falling_edge instead of rising_edge. We shall see if I regret this later |
earlz |
4433d 05h |
/tinycpu |
| 26 |
Added extra check to make sure fetcher works properly after memory write |
earlz |
4433d 06h |
/tinycpu |
| 25 |
Wait for memory state now works as expected, and opcode `mov [reg], immd` works now |
earlz |
4433d 10h |
/tinycpu |
| 24 |
Good news, mov to IP actually works as expected! |
earlz |
4434d 04h |
/tinycpu |
| 23 |
Added top module for testing how our memory and cpu will work together. (hint: success)
Messing around with a small timing issue in core |
earlz |
4434d 04h |
/tinycpu |
| 22 |
Added to process sensitivity list to avoid warning and added ELSE for IR so it doesn't generate a latch |
earlz |
4434d 20h |
/tinycpu |
| 21 |
The core_tb testbench finally passes. It probably doesn't synthesize, or even pass other testbenches, but it passes that one damn it. |
earlz |
4434d 20h |
/tinycpu |
| 20 |
fuck it. All sorts of broken, will try to fix it tomorrow |
earlz |
4435d 20h |
/tinycpu |
| 19 |
Got beginning of core/decoder for the CPU |
earlz |
4435d 21h |
/tinycpu |
| 18 |
Finished memory controller |
earlz |
4439d 07h |
/tinycpu |
| 17 |
Added fetch component for fetching from memory to instruction register
Added additional testing for carryover to make sure it's correct |
earlz |
4439d 20h |
/tinycpu |
| 16 |
Renamed incdec to carryover (see design for why).
carryover should be done, though may change the "straight through on disable" behavior to instead leaving it floating depending on how things go later with coding. |
earlz |
4442d 23h |
/tinycpu |
| 15 |
Added README, LICENSE, and the (so far not created) incdec component |
earlz |
4444d 20h |
/tinycpu |
| 14 |
Added ALU with all the operations we'll need. Synthesizes as well trivially |
earlz |
4445d 04h |
/tinycpu |
| 13 |
Forgot about the new library I added |
earlz |
4445d 07h |
/tinycpu |
| 12 |
registerfile has ports for every register now
makefile now uses GHW file format for gtkwave instead of VCD |
earlz |
4445d 08h |
/tinycpu |
| 11 |
Finally, it synthesizes to BRAM.. Possibly need to fix how the DataOut syncs with WriteEnable and Address though if I plan to both read and write on the same clock edge |
earlz |
4448d 21h |
/tinycpu |
| 10 |
Just committing so I can keep this original that passes simulation, but still synthesizes to LUTs |
earlz |
4448d 21h |
/tinycpu |
