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-{{:projekte:logo.png?300|}}
-====== EuroTwo CPU ======
-Contact: [[user:nopx|nopx]]
-Projectstatus: {{:projekte:wip.png?50|}}
-Documentation: [[projekte:eurotwo#Documentation|here]].
-==== Status ====
-=== 2021-01-03 ===
-After I found that the ISP programming pins are wrong, I successfully programmed the first digital controller. The clock simulation is now up and running. Next RAM and ROM simulation. That will be a software task. It is fun to work digital again!
-{{:projekte:photo_2021-01-03_00-20-46.jpg?300| }}
-=== 2021-01-02 ===
-I made a bunch of power cables today. Also I ordered a lot of screws and other stuff. Hopefully tomorrow my board will arrive!
-{{:projekte:photo_2021-01-01_19-52-47.jpg?300|}}
-=== 2020-12-31 ===
-I soldered 5 more MUXs. Also I ordered ~100 new PCBs. Distributors, HalfAdders, LogicBlocks like Inverters and stuff, and also a Digital Controller to simulate ROM, RAM, and the ControlUnit. The plan is to replace the DigitalControllers bit by bit. Starting with the control unit. Assumed I own enough cables, clips, relays and screws I should own everything to have a running CPU in the next few days.
-{{:projekte:photo_2020-12-31_11-39-02.jpg?300|}}
-=== 2020-10-28 ===
-I tried a different setup of the logo illumination by using two PCBs. I sanded the backside of the first PCB and assembled the LED in the other direction on the second one. This look much smoother and better!
-{{:projekte:logo.jpg?300|}}
-=== 2020-10-18 ===
-Testing worked fine. Design looks nice.
-{{:projekte:photo_2020-10-18_16-25-11.jpg?300|}}
-=== 2020-08-10 ===
-I designed a testing board with a SN754410 H-Bridge driver for testing. I can test 4 outputs and 4 inputs per testing board easily with an Arduino now. The SN754410 is still in delivery and will get assembled later. [[https://twitter.com/nopx15/status/1295631724949508097|Tweet, including a short video of the testing]]
-{{:projekte:photo_2020-08-10_22-11-14.jpg?300|}}
-=== 2020-08-01 ===
-My automated long term test is up and running. 1000 test-iterations per bit. Tuned the loading speed of the C (adding 100 Ohms), added diodes (1N4007) and tuned the holding voltage of the relais better by adding 100 Ohms.
-{{:projekte:img_20200801_112154.jpg?300|}}
-=== 2020-06-28 ===
-Fixed the "4-Bit Register rev2" board. The board is fully functional but has some drawbacks. You need to scratch away 8 traces on the board and solder 8 short wires on it.
-The fixes for rev3 are:
-  * Cs were not aligned correctly to matching relais. Nobody will see this but still, it is not as intended! Fixed in rev3
-  * There is a mistake at the store relays. That is why you need to scratch traces. Fixed in rev3
-  * Rev2 is unable to select between rising and falling edge. This is fixed in rev3 by a jumper
-  * B.Mask is under the LED-Indicator on the back, that is why the light is not as bright as intended. Fixed in rev3.
-  * Numbering of the LEDs would be helpful. Fixed in rev3.
-=== 2020-06-18 ===
-The PCBs for the 4Bit Register and the Logo did arrive. I assembled them successfully. I'm now waiting for the new Relays HK19F for the final test of the registers. In the Logo-PCB there was a little mistake but I succeed fixing it by scraping away two traces.
-{{:projekte:photo_2020-06-18_15-25-33.jpg?300|}}
-{{:projekte:photo_2020-06-18_15-25-30.jpg?300|}}
-===== Documentation =====
-==== Downloads ====
-  * {{ :projekte:eurotwo_v0.002.pdf |EuroTwo v0.002 Manual [PDF]}}
-  * {{ :projekte:eurotwo_v0.004.pdf |EuroTwo v0.004 Manual [PDF]}}
-  * {{ :projekte:onepiece_rev1_v0.004.0.pdf |EuroTwo OnePiece v0.004.0 Schematic [PDF]}} (untested)
-==== Sizes/Standards ====
-{{:projekte:mase.png?200|}}
-  * Holes for signals: 2_2mm vias or pads
-  * Holes for currents: 3.2
-  * GND on top holes
-  * +5V on bottom holes
-==== Errata ====
-=== HalfAdder rev1 ===
-  - Silkscreen AxorB -> A&B
-=== DigitalController v1 ===
-  * https://www.mikrocontroller.net/topic/477873
-  *