| Rev |
Log message |
Author |
Age |
Path |
| 33 |
Added more test cases for push/pop. More are still needed though
Fixed SP increment/decrementing
Added new opcode `mov reg,reg` so debugging isn't such a pain |
earlz |
4386d 06h |
/tinycpu/trunk/ |
| 32 |
Finished up changes needed to make memory reading actually work.
Push and Pop now work |
earlz |
4386d 08h |
/tinycpu/trunk/ |
| 31 |
Removed the infamous TRData latch from ALU. Now synthesizes (sorta) warning free. No latches are used. |
earlz |
4387d 03h |
/tinycpu/trunk/ |
| 30 |
After a long weekend of thinking how to do this.. I've decided instead to not strive for a single-cycle computer.
Now, instead, ALU operations will be 2 cycle along with memory operations, and data movement operations are still 1 cycle |
earlz |
4387d 04h |
/tinycpu/trunk/ |
| 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 |
4390d 10h |
/tinycpu/trunk/ |
| 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 |
4391d 05h |
/tinycpu/trunk/ |
| 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 |
4391d 11h |
/tinycpu/trunk/ |
| 26 |
Added extra check to make sure fetcher works properly after memory write |
earlz |
4391d 12h |
/tinycpu/trunk/ |
| 25 |
Wait for memory state now works as expected, and opcode `mov [reg], immd` works now |
earlz |
4391d 16h |
/tinycpu/trunk/ |
| 24 |
Good news, mov to IP actually works as expected! |
earlz |
4392d 10h |
/tinycpu/trunk/ |
| 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 |
4392d 10h |
/tinycpu/trunk/ |
| 22 |
Added to process sensitivity list to avoid warning and added ELSE for IR so it doesn't generate a latch |
earlz |
4393d 02h |
/tinycpu/trunk/ |
| 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 |
4393d 02h |
/tinycpu/trunk/ |
| 20 |
fuck it. All sorts of broken, will try to fix it tomorrow |
earlz |
4394d 02h |
/tinycpu/trunk/ |
| 19 |
Got beginning of core/decoder for the CPU |
earlz |
4394d 03h |
/tinycpu/trunk/ |
| 18 |
Finished memory controller |
earlz |
4397d 13h |
/tinycpu/trunk/ |
| 17 |
Added fetch component for fetching from memory to instruction register
Added additional testing for carryover to make sure it's correct |
earlz |
4398d 02h |
/tinycpu/trunk/ |
| 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 |
4401d 05h |
/tinycpu/trunk/ |
| 15 |
Added README, LICENSE, and the (so far not created) incdec component |
earlz |
4403d 02h |
/tinycpu/trunk/ |
| 14 |
Added ALU with all the operations we'll need. Synthesizes as well trivially |
earlz |
4403d 10h |
/tinycpu/trunk/ |
