| Rev |
Log message |
Author |
Age |
Path |
| 34 |
Implemented load and store instructions (`mov reg, [reg]` and `mov [reg], reg` respectively) |
earlz |
4553d 01h |
/tinycpu/trunk/testbench/ |
| 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 |
4553d 05h |
/tinycpu/trunk/testbench/ |
| 32 |
Finished up changes needed to make memory reading actually work.
Push and Pop now work |
earlz |
4553d 06h |
/tinycpu/trunk/testbench/ |
| 31 |
Removed the infamous TRData latch from ALU. Now synthesizes (sorta) warning free. No latches are used. |
earlz |
4554d 02h |
/tinycpu/trunk/testbench/ |
| 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 |
4554d 02h |
/tinycpu/trunk/testbench/ |
| 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 |
4557d 09h |
/tinycpu/trunk/testbench/ |
| 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 |
4558d 03h |
/tinycpu/trunk/testbench/ |
| 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 |
4558d 09h |
/tinycpu/trunk/testbench/ |
| 26 |
Added extra check to make sure fetcher works properly after memory write |
earlz |
4558d 10h |
/tinycpu/trunk/testbench/ |
| 25 |
Wait for memory state now works as expected, and opcode `mov [reg], immd` works now |
earlz |
4558d 15h |
/tinycpu/trunk/testbench/ |
| 24 |
Good news, mov to IP actually works as expected! |
earlz |
4559d 08h |
/tinycpu/trunk/testbench/ |
| 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 |
4559d 08h |
/tinycpu/trunk/testbench/ |
| 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 |
4560d 00h |
/tinycpu/trunk/testbench/ |
| 20 |
fuck it. All sorts of broken, will try to fix it tomorrow |
earlz |
4561d 00h |
/tinycpu/trunk/testbench/ |
| 19 |
Got beginning of core/decoder for the CPU |
earlz |
4561d 02h |
/tinycpu/trunk/testbench/ |
| 18 |
Finished memory controller |
earlz |
4564d 11h |
/tinycpu/trunk/testbench/ |
| 17 |
Added fetch component for fetching from memory to instruction register
Added additional testing for carryover to make sure it's correct |
earlz |
4565d 01h |
/tinycpu/trunk/testbench/ |
| 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 |
4568d 03h |
/tinycpu/trunk/testbench/ |
| 15 |
Added README, LICENSE, and the (so far not created) incdec component |
earlz |
4570d 01h |
/tinycpu/trunk/testbench/ |
| 14 |
Added ALU with all the operations we'll need. Synthesizes as well trivially |
earlz |
4570d 09h |
/tinycpu/trunk/testbench/ |
