LarryL

Just sold one set of bare PCBs to somebody in Germany (started selling off the remaining 4 sets) so maybe one more to join soon 🙂

Hi @uji thanks, just waiting for the deliveries of the Pi4 (have chosen the 2G version) and the PiStorm most probably both will not arrive until Friday, so I will join the party a bit later Will also join the Discord channel then regards Michael

Hi, just ordered a PiStorm to start playing around, testing, having fun… I have an Exxos H5 available… one question: which version of the Pi4 is required? I mean, what RAM size - 1G, 2G, 4G or even 8G? cheers Michael

It wasn’t utsource, but a seller from UK - eBay name „myretrostore-uk“ this is via a AV2HDMI converter, not the one you recommended, but another Chinese model (but without S-Video) will do some more video tests during the week (the other converter, direct connection to TV, etc.) Will also run all the test Programms you provided, to check if all is good (Joystick and Keyboard are basically working)

Success! changed the LM1889 and now I have color 🙂 will do some further tests with different screens and adapters

Tomorrow I will receive one from UK - let’s see. in the meantime I am checking (3rd time) solder joints, shorts, values, etc. 🙂 I will also receive spare VDPs from China during next weeks I will do some screenshots during next days and post them I will also scope the different clock signals and post the pictures

yepp, working on it from time to time (but having limiter spare time actually) will write some details later just in short: having tested two Converters: the one you showed on you web page does not show any picture at all - not via CVBS and not via S-Video another one, having only CVBS shows a picture with strange colours, mostly yellow I might have a fake LM1889 - need to check in more details regards Michael

Yepp, I have ordered exactly this a few days back but it is coming from China - will take a while Used to be available at Amazon Germany - but out of stock now

Oh, I do not have a 3D printer I used a professional service to get it printed. Not the cheapest (not from China, but close to my hometown here in Germany) put the result is always good quality I will surely post some more pictures, once the resistor arrays arrive the AV adapter will show up at some point of time 🙂

Ok, got the resistor networks out, using the process from above video worked surprisingly well. they did not fall out immediately, but with a little bit of wiggling they have lost the battle now I need to wait for the new resistor arrays to arrive did some case work in the meantime. needed to remove a bit of PLA with a Dremel at the front inner side of the case (as described in one of the above posts) now the back panel goes in smoothly also melted the M2.5 threaded inserts into the top of the case - but this will require longer screws compared to e.g. the XEP-80 II seems that M2.5x30mm will fit Keypad also fits very well - Used small M2.5 screws to secure it

Wow, that’s a pretty awesome trick

Yeah, it is really tight in this area… seems I got confused by the BOM I have downloaded some weeks ago and took an existing 9p RN from my stock No problem, I will manage… BTW: since the system works even with the 9p RN, I gave it a try - and it booted right the first time 🙂 of course I did the voltage checks upfront (without chips) got confused a second, measuring 12V at the CD4066 - but checking the schematics proves that this is right 🙂 now I have to find my AV2HDMI adapter, because my PAL LCD shows quite funny colors trying to display NTSC I know I bought one recently and also successfully used it with another NTSC project (the N8 from retrobrewcomputers.org) - but where is it? at least the CV-NUC shows a picture and I was able to play a short round of Donkey Kong 🙂 Joystick and Keypad works, Sound works… so far so good Had some problems with the QUAD board initially - no USB device detected. but after checking and reflowing the SMD chip, all went well and I got it programmed but first I have to fix the resistor arrays, then I will do some more intensive checks with the test ROMs you provided (copied them already to the Atarimax Cart) it is really a great project, all fitting so nicely together - a really excellent design @mytek

right, used the machine sockets I already had laying around. had some bad experience with cheap Dual wipe sockets recently… thought you designed it intentionally 🙂 was a perfect fit with the two bars! but during checking, I figured out a mistake I did: since I did not read the build manual carefully enough, I added the wrong RN1,2 - 9pin, not 8pin I then used SMD 10k resistors on the back from the 9th pin to pin 10 of the LS541 (not from the empty pin to pin 10) stupid… although the silk screen shows exactly a 8pin resistor array Now I have to try to get the RN1,2 out again without damaging stuff…

Yeah, I had the parts in my stock and was too lazy to check/compare them against the BOM… but I got them quite quickly and was able to complete the board today 🙂 tomorrow is „smoke test“ 🙂

So, finally started - and progressing still waiting for some parts, since I have realized that some of my parts did not perfectly fit. like the DC barrel jack (way to large pins) and the DB9 (mine have sockets for screws) and yes, I have read the post, that the barrel jack pins are a tight fit - but mine do not really have pins, but way larger „soldering lugs“ Anyway, satisfied so far… …will it boot first time? Let’s see 🙂 edit: now the whole bunch…