| Rev |
Log message |
Author |
Age |
Path |
| 34 |
Implemented load and store instructions (`mov reg, [reg]` and `mov [reg], reg` respectively) |
earlz |
4573d 02h |
/tinycpu/trunk/docs/design.md.txt |
| 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 |
4573d 06h |
/tinycpu/trunk/docs/design.md.txt |
| 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 |
4574d 03h |
/tinycpu/trunk/docs/design.md.txt |
| 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 |
4577d 10h |
/tinycpu/trunk/docs/design.md.txt |
| 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 |
4578d 10h |
/tinycpu/trunk/docs/design.md.txt |
| 25 |
Wait for memory state now works as expected, and opcode `mov [reg], immd` works now |
earlz |
4578d 16h |
/tinycpu/trunk/docs/design.md.txt |
| 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 |
4580d 02h |
/tinycpu/trunk/docs/design.md.txt |
| 19 |
Got beginning of core/decoder for the CPU |
earlz |
4581d 03h |
/tinycpu/trunk/docs/design.md.txt |
| 17 |
Added fetch component for fetching from memory to instruction register
Added additional testing for carryover to make sure it's correct |
earlz |
4585d 02h |
/tinycpu/trunk/docs/design.md.txt |
| 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 |
4588d 05h |
/tinycpu/trunk/docs/design.md.txt |
| 14 |
Added ALU with all the operations we'll need. Synthesizes as well trivially |
earlz |
4590d 10h |
/tinycpu/trunk/docs/design.md.txt |
| 5 |
Modified registerfile to be dual-port for both read and write |
earlz |
4596d 03h |
/tinycpu/trunk/docs/design.md.txt |
| 4 |
Added internal memory interface
Updated design |
earlz |
4596d 11h |
/tinycpu/trunk/docs/design.md.txt |
| 3 |
Updated registerfile to have 2 read ports
Added super rough design document mainly just for brainstorming |
earlz |
4597d 03h |
/tinycpu/trunk/docs/design.md.txt |
