Rev |
Log message |
Author |
Age |
Path |
39 |
A lot of work in the assembler. It now supports nearly every opcode implemented and is a lot cleaner
Added a bootrom. There isn't really a point in testbenching this.. I'm not for sure how I would, and it will change so much in these early days that it'll be pointless I think
Everything should be ready to go for a test on actual hardware now! |
earlz |
4456d 06h |
/tinycpu/trunk |
38 |
Made it synthesize without latches |
earlz |
4456d 09h |
/tinycpu/trunk |
37 |
Worked on the assembler more
Added a memory mapped port to memory.vhd. This change causes a lot of latches to be inferred in synthesis however, so this will have to change some |
earlz |
4458d 07h |
/tinycpu/trunk |
36 |
Assembler actually has a real opcode now |
earlz |
4458d 08h |
/tinycpu/trunk |
35 |
Added a little assembler ruby script. Basically, I plan on levaraging the power of Ruby as a DSL to very easily create an assembler, rather than having to parse everything myself. |
earlz |
4458d 17h |
/tinycpu/trunk |
34 |
Implemented load and store instructions (`mov reg, [reg]` and `mov [reg], reg` respectively) |
earlz |
4459d 07h |
/tinycpu/trunk |
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 |
4459d 11h |
/tinycpu/trunk |
32 |
Finished up changes needed to make memory reading actually work.
Push and Pop now work |
earlz |
4459d 12h |
/tinycpu/trunk |
31 |
Removed the infamous TRData latch from ALU. Now synthesizes (sorta) warning free. No latches are used. |
earlz |
4460d 07h |
/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 |
4460d 08h |
/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 |
4463d 15h |
/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 |
4464d 09h |
/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 |
4464d 15h |
/tinycpu/trunk |
26 |
Added extra check to make sure fetcher works properly after memory write |
earlz |
4464d 16h |
/tinycpu/trunk |
25 |
Wait for memory state now works as expected, and opcode `mov [reg], immd` works now |
earlz |
4464d 20h |
/tinycpu/trunk |
24 |
Good news, mov to IP actually works as expected! |
earlz |
4465d 14h |
/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 |
4465d 14h |
/tinycpu/trunk |
22 |
Added to process sensitivity list to avoid warning and added ELSE for IR so it doesn't generate a latch |
earlz |
4466d 06h |
/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 |
4466d 06h |
/tinycpu/trunk |
20 |
fuck it. All sorts of broken, will try to fix it tomorrow |
earlz |
4467d 06h |
/tinycpu/trunk |
19 |
Got beginning of core/decoder for the CPU |
earlz |
4467d 08h |
/tinycpu/trunk |
18 |
Finished memory controller |
earlz |
4470d 17h |
/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 |
4471d 07h |
/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 |
4474d 09h |
/tinycpu/trunk |
15 |
Added README, LICENSE, and the (so far not created) incdec component |
earlz |
4476d 07h |
/tinycpu/trunk |
14 |
Added ALU with all the operations we'll need. Synthesizes as well trivially |
earlz |
4476d 15h |
/tinycpu/trunk |
13 |
Forgot about the new library I added |
earlz |
4476d 17h |
/tinycpu/trunk |
12 |
registerfile has ports for every register now
makefile now uses GHW file format for gtkwave instead of VCD |
earlz |
4476d 18h |
/tinycpu/trunk |
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 |
4480d 07h |
/tinycpu/trunk |
10 |
Just committing so I can keep this original that passes simulation, but still synthesizes to LUTs |
earlz |
4480d 08h |
/tinycpu/trunk |