SainT Posted June 5, 2015 Author Share Posted June 5, 2015 (edited) Lol, no, that is a good summary. Everything is good. Where the bizarre interjections about memory card speed and resetting come from, I'm really not sure. That's something I was talking about right at the beginning of the thread before I'd figured out how I was going to deal with everything. Edited October 25, 2019 by SainT 1 Quote Link to comment Share on other sites More sharing options...
+remowilliams Posted June 5, 2015 Share Posted June 5, 2015 Where the bizarre interjections about SD card speed and resetting come from, I'm really not sure. The thread suffered a bout of the 'Carmel Andrews' syndrome for a bit. 1 Quote Link to comment Share on other sites More sharing options...
+MacRorie Posted June 5, 2015 Share Posted June 5, 2015 The prototype looks great! Nice work. Quote Link to comment Share on other sites More sharing options...
7800fan Posted June 6, 2015 Share Posted June 6, 2015 Cool! I would think make the cover optional for those who has Lynx 1? They could just load the ROMs, plug the board in, and never open the cover again. Quote Link to comment Share on other sites More sharing options...
fille1976 Posted June 6, 2015 Share Posted June 6, 2015 i want 1 please if its finished. Quote Link to comment Share on other sites More sharing options...
Zoyx Posted June 6, 2015 Share Posted June 6, 2015 i want 1 please if its finished. It isn't. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 6, 2015 Share Posted June 6, 2015 I've just not had the time to sort out my pick n place tool, so I've done a board the old fashioned way with tweezers and a reflow gun. Was easier than I'd expected, seems to have come out ok after sorting a couple of solder bridges. Not going to get a chance to see if I my soldering is ok until tomorrow evening now. But this is what the finished units are roughly going to look like... Hi, if you finaly managed to make a worling prototype micro sd flashcard for the lynx, i will buy one, you can alway's look at me to contact me. I feel my hearth already pumping faster ,getting warm fuzzy feelings,i feel i got very coriouse now. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 6, 2015 Share Posted June 6, 2015 I've just not had the time to sort out my pick n place tool, so I've done a board the old fashioned way with tweezers and a reflow gun. Was easier than I'd expected, seems to have come out ok after sorting a couple of solder bridges. Not going to get a chance to see if I my soldering is ok until tomorrow evening now. But this is what the finished units are roughly going to look like... This prototype sd flascard for the lynx looks awesome and very promising,now i only wonder why i ditn't found one via google, i tryed everything, i just found this awaited picture by accident by following this forum. Now, this site still confuses me alot but i think got the hang on it now. Anyway am desperate to place an order once those working prototypes are ready for production. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 6, 2015 Share Posted June 6, 2015 Ok, I have something working. My reflow skills are not great, so the first board didn't work and then I killed the PIC chip figuring out why. So I tried again and after a bit of debugging and fixing some bad solder joints it's finally loading up a game. It just loads "lynx.rom" directly from the SD card into the SRAM, then hands control over to the Lynx. So it sits on the "Insert Game" screen for a few seconds, then the game appears. Jiimmy Connors Tennis starts up just fine now. I can't play it yet, though, as I'm driving the Lynx bus directly all the time through the 245 chip to test everything. The bus ends up getting shared by the control pad and buttons, so it's interfering with the controls currently. The next job will be hooking up one of the configurable logic cells in the PIC so the bus is only driven when the chip strobe is low then I should be able to actually play something. I'm just about at the proof of concept stage now. Just a couple more things to sort and this will be properly working. This picture alone is a wetdream for lynx fans like me, no matter how i googled around, i couldn't find 1 picture of this, not one, just insane, but am glad i found it, now i only got my hands on it on one day once fully complete. This surely opens new dours for homebrewers,like making games with sampled sound and animations or putting a level editor to store your creations on the sd cart, the potential is there, i will thumb for you to make money out of this project, good luck. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 6, 2015 Share Posted June 6, 2015 How can SD be too "slow"? Some of the faster SD cards can do read upward of 100Mb/sec (UHS-3 for example), far faster than what Lynx RAM can be written to. Plus most of the games are 512k or less, the entire ROM could have been copied to flash cart's temp SRAM when on flash cart menu, then reboot Lynx to load the game off SRAM. SD card have been used in N64 and 32X flash carts without any issues. Those could easily run circles around Lynx on overall processing power. There's even working Playstation 1 SD adapter to play CD ISO, and that's as much as 600MB or more per disc. (granted, it loads about the same speed as original CD mechanism, 300Kb/sec max which even the pokey class 2 SD will handle fine) I totaly agree with you here,but someone here wroted that once he tested the sd cart on the lynx, the lynx was expecting reading the bootstrap from it way too fast,but since you mentioned that sd cards also can/have a fast transfer speed, i guess that guy probably just used a slow sd card to test it out,haha. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 6, 2015 Share Posted June 6, 2015 Hey thanks for this information i am satisfied ,i readed an fransch artical about it for wich i could hardly make out the same things about it,it's called the xcart, It's just a matter of time, Just search me on facebook so we can have business with eachother. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 6, 2015 Share Posted June 6, 2015 Yeah since you mentioned it, YES I FINALY SAW A PROTOTYPE of the sd flash cart for the lynx from saint, HOWEVER, the problem was whatever i was searching trough google i couldn't find any picture of, no nothing, untill i dit come across here, followed this tread and,,, BINGO i finaly saw 3 images of it, oh man what a releave, now am convinced, i gonne buy one as soon when i gets into production,hey hey. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 6, 2015 Share Posted June 6, 2015 Here you go! There will likely be another pcb revision yet to tidy things up a bit, but this is working. I may even provide some kind of abs plastic shell over the chips as an optional extra as I've bought myself a 3D printer since I stared the project. The coloured cable is the icsp cable for the pic micro, by the way. It won't be on the production units... Hi, i wonder were those 6 wires were used for,or are these wires just for testing this flashcard or something? Quote Link to comment Share on other sites More sharing options...
GadgetUK Posted June 6, 2015 Share Posted June 6, 2015 Those 6 wires are so he can program and debug it. Quote Link to comment Share on other sites More sharing options...
Andromeda Stardust Posted June 6, 2015 Share Posted June 6, 2015 I totaly agree with you here,but someone here wroted that once he tested the sd cart on the lynx, the lynx was expecting reading the bootstrap from it way too fast,but since you mentioned that sd cards also can/have a fast transfer speed, i guess that guy probably just used a slow sd card to test it out,haha.Wouldn't holding down the Lynx power button for a couple seconds create a seudo extended reset period giving the OS enough time to load? If not, then you will need a boot ROM to strap the OS and access the SD card, in addition to volatile RAM or flash memory. Quote Link to comment Share on other sites More sharing options...
SainT Posted June 7, 2015 Author Share Posted June 7, 2015 Argh! Right, there are no issues. Johannesmutlu, please read the entire thread and stop posting about issues which were solved months ago, you are confusing the hell out of everyone and filling this thread with noise. Delayed startup is handled by simply disabling the Lynx bus while power is on, this keeps it in the "insert cartridge" stage, you then enable the bus when your data is available. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 7, 2015 Share Posted June 7, 2015 i am very interrested in this concept to have all games on one cart instead of hardly hunting down all those games, now again i really want to buy this sd flashcard aslong it does NOT require any moddification of the lynx. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 7, 2015 Share Posted June 7, 2015 Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 7, 2015 Share Posted June 7, 2015 Argh! Right, there are no issues. Johannesmutlu, please read the entire thread and stop posting about issues which were solved months ago, you are confusing the hell out of everyone and filling this thread with noise. Delayed startup is handled by simply disabling the Lynx bus while power is on, this keeps it in the "insert cartridge" stage, you then enable the bus when your data is available. Yeah your right i got to stop filling this thread with noise , but the fact is this site cobfuses the shit out of me in the ins & outs, now i slowly got the hang on it, the main issues was anytime i was talking about those (solved) problems, and post them, it dit NOT see my posted message untill i come back later,so i alway's first tout that my message wasn't posted or something,now i try to eliminate my posted useless bombed noise. Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 7, 2015 Share Posted June 7, 2015 Quote Link to comment Share on other sites More sharing options...
Hyperboy Posted June 7, 2015 Share Posted June 7, 2015 @johannesmutlu.. Did you bump every single lynx thread?? It's like you pushed every button on the elevator in the Burj Khalifa ? 2 Quote Link to comment Share on other sites More sharing options...
Zoyx Posted June 7, 2015 Share Posted June 7, 2015 @johannesmutlu ... stop posting. 6 Quote Link to comment Share on other sites More sharing options...
+remowilliams Posted June 7, 2015 Share Posted June 7, 2015 This is what happens when someone accidentally wanders out of the Facebook garden. 2 Quote Link to comment Share on other sites More sharing options...
johannesmutlu Posted June 7, 2015 Share Posted June 7, 2015 Hi, am waiting till you are ready to recieve orders for production of those sd flashcard pcb's for the lynx. You can contact me trough my emailadress johannesmutlu@hotmail.com to keep me updated, or check me on facebook just type in johannesmutlu. Thanks for your info, i learned from my mistakes on this site,because i saw your prototypes pcb,stupid google ditn't view them, i discovered them by coincidence,again sorry for my spreaded noise. Quote Link to comment Share on other sites More sharing options...
Andromeda Stardust Posted June 7, 2015 Share Posted June 7, 2015 @johannesmutlu: please stop. When the OP has something to announce he will let everyone know. 1 Quote Link to comment Share on other sites More sharing options...
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