This is an Amiga 4000 A3630 CPU Card reimplementation, simpler 2-layer board that supports only 68030/68882 in PGA package. I am currently building a replica A4000 board and I want a simple way to test it. I could not find a used A3630 card and testing it on an expensive 68060 CPU card is out of the question, I wouldn't want to burn such an expensive card. So I decided to build a A3630 reimplentation on my own. By the time I was half-way I found out that it was already reverse engineered by John "Chucky" Hertell at: http://www.reamiga.info/?page_id=44. Furthermore, after about a few weeks of trying to understand the schematics by looking at Chucky's board, I found the actual A3630 schematics on https://www.amigawiki.org/dnl/schematics/A3630.pdf! That showed me many mistakes I had made and allowed me to clean up my own schematics. In the process I ended up redoing the schematics and the board from scratch. In any case, I continued with my design as it is simpler than the original A3630, it doesn't offer the choice of 68020/68030 nor different choices of PLCC/PGA FPU. I went for PGA versions for both, as they are much easier to solder by hand than QFP (I have not mastered drag soldering yet), not to mention much cooler looking. A feature I kept though is the choice of using a crystal for the CPU/FPU if running on a different frequency than the 25Mhz default. Ideally total cost for the board should be slightly less 100EUR, incl. CPU/FPU. As mentioned this is a 2-layer board. The original A3630 is 4-layer (middle layers are GND/VCC). I don't think it's really needed in this case as the frequencies are quite low. Although I have not tested that claim yet and I may be wrong. In the process, I created a few parts/footprints for the following items: * KEL200 connector, a 200-pin connector which is used to connect the CPU card to the Amiga 4000 motherboard (it should be the same in Amiga 3000 if I am not mistaken). However I am not sure this card makes much sense in the A3000 as it already has a 68030 CPU/FPU. Perhaps only if using a higher clock than the default 25Mhz. Link for the component here: https://easyeda.com/component/6cd7654456d944538593b212cc868df5 * MC68030 PGA. There are already a few parts available in EasyEDA but I needed all the pins as they appear in the A3630 schematic. https://easyeda.com/component/777c712c29d84dcaa5a63b3431f4d7e8 * MC68881/2 PGA. Same reason https://easyeda.com/component/8b5fda783f7240aaa5cb2edf46755f96 NOTE: This is still not reviewed and untested! Do NOT try it out on your Amiga yet! Consider this an alpha release! You have been warned! Note 2: This is my first average complexity hardware project. I'm pretty sure I've made many design mistakes in the schematics/PCB. Comments and suggestions to improve it are welcome.