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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 4395d 05h /tinycpu/trunk/docs/
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 4398d 12h /tinycpu/trunk/docs/
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 4399d 13h /tinycpu/trunk/docs/
25 Wait for memory state now works as expected, and opcode `mov [reg], immd` works now earlz 4399d 18h /tinycpu/trunk/docs/
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 4401d 04h /tinycpu/trunk/docs/
19 Got beginning of core/decoder for the CPU earlz 4402d 05h /tinycpu/trunk/docs/
17 Added fetch component for fetching from memory to instruction register
Added additional testing for carryover to make sure it's correct
earlz 4406d 04h /tinycpu/trunk/docs/
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 4409d 07h /tinycpu/trunk/docs/
14 Added ALU with all the operations we'll need. Synthesizes as well trivially earlz 4411d 12h /tinycpu/trunk/docs/
5 Modified registerfile to be dual-port for both read and write earlz 4417d 05h /tinycpu/trunk/docs/
4 Added internal memory interface
Updated design
earlz 4417d 13h /tinycpu/trunk/docs/
3 Updated registerfile to have 2 read ports
Added super rough design document mainly just for brainstorming
earlz 4418d 05h /tinycpu/trunk/docs/

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