CPUWIZ Posted August 5, 2006 Share Posted August 5, 2006 Yeah, looks like it will be $5.00 for the bare board Mmmmmh, competition. Why did you have to import them? Because it's cheaper. Quote Link to comment Share on other sites More sharing options...
kenfused Posted August 5, 2006 Share Posted August 5, 2006 I guess I don't ever seeing myself going with a new pokey board unless some large abundant and cheaper supply of pokeys and be found. The only exception might be if pokey could be mapped at a different address so I could still have some RAM on there too. Probably could map one somewhere lower in memory that doesnt interfere with anything, or with the HSC, or at the very least give it a smaller footprint than 16K. When you add up the cost of board+pokey+case it is probably better to just cannibilize ballblazer carts otherwise (at least until the one place runs out of cases of them). For SRAM it might be nice to support both dip sizes. The skinny dip might be easier to fit on the board, but the wider dip is easier to find (but I haven't looked too hard yet). Quote Link to comment Share on other sites More sharing options...
Bruce Tomlin Posted August 8, 2006 Author Share Posted August 8, 2006 I guess I don't ever seeing myself going with a new pokey board unless some large abundant and cheaper supply of pokeys and be found. The only exception might be if pokey could be mapped at a different address so I could still have some RAM on there too. Probably could map one somewhere lower in memory that doesnt interfere with anything, or with the HSC, or at the very least give it a smaller footprint than 16K. When you add up the cost of board+pokey+case it is probably better to just cannibilize ballblazer carts otherwise (at least until the one place runs out of cases of them). For SRAM it might be nice to support both dip sizes. The skinny dip might be easier to fit on the board, but the wider dip is easier to find (but I haven't looked too hard yet). I tried, and I couldn't get both skinny and wide RAM chips to fit because of that @#%!@ screw post, and the narrow neck too. I just couldn't get enough lines up there at the design rules I was working with. And there's really no point in going multi-layer. And I've got tons of narrow RAM chips that I've scavenged over the years, especially the ones that they used for 386/486 caches. (as someone else mentioned long ago, they might not be low power, but that's only a problem if you want to use a battery). But I agree that it's kind of going to be a problem to put a Pokey in every game when they're, what, five bucks each? We need an HSC-style inline cartridge, but that would be a bit of a pain to design, and how just sturdy are stacked 7800 carts anyhow? So anyhow, last night I drew up some diagrams for the six main jumper combinations (ignoring 512K and 1M) on an image of the top copper layer, dug up all the parts I needed, and soldered a socketed board for a 128K game. Then this morning I burned a GAL and a 27C010 with Klax. Klax started up the first time. That's a good sign. There is only going to be one GAL for most combinations. I have a GAL for 144K, but only Alien Brigade and Crossbow used 144K, and I think it's possible to arrange them to work on a 256K board. 512K and 1M require a 22V10 GAL, and I'll worry about those when someone is actually doing that big of a game. 256K should be plenty for now. 1 Quote Link to comment Share on other sites More sharing options...
Bruce Tomlin Posted August 19, 2006 Author Share Posted August 19, 2006 I just got a bunch of 74LS02 chips, so I'm all ready to make pre-loaded boards now. Seeing as to recent developments, I need to charge $4 for a bare board, $4.50 for a board with a 74LS02 installed, and $6 with a bankswitch chip installed. Please specify the desired size for pre-installed boards. (8/16K, 32K, 48K, 64K, 128K, 144/256K) Send e-mail to bruce@xi6.com. Quote Link to comment Share on other sites More sharing options...
PacMan Posted August 19, 2006 Share Posted August 19, 2006 Email sent. Quote Link to comment Share on other sites More sharing options...
Bruce Tomlin Posted September 20, 2006 Author Share Posted September 20, 2006 I've been working on some preliminary documentation: http://atari7800.net/mini-ultra/ Quote Link to comment Share on other sites More sharing options...
DracIsBack Posted January 2, 2010 Share Posted January 2, 2010 Just wondering about this. Quote Link to comment Share on other sites More sharing options...
uveprom Posted May 12, 2015 Share Posted May 12, 2015 Hi, i want to build 128k cartridge for my 7800,,, i did 32k cartridge it works ok, i have PLD chips,,, so i need code for PLD and schematics to can do 128k games,,,someone can help me with that ? Quote Link to comment Share on other sites More sharing options...
Lynxpro Posted May 24, 2015 Share Posted May 24, 2015 Hi, i want to build 128k cartridge for my 7800,,, i did 32k cartridge it works ok, i have PLD chips,,, so i need code for PLD and schematics to can do 128k games,,,someone can help me with that ? Seems like everyone wants to make 7800 cartridge boards. Will someone please think of the 5200? Just think…if there was a bankswitching 128K board, Tempest Xtreeme could be converted for it; same with a lot of the titles Atari Corp commissioned for the XEGS. Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted May 24, 2015 Share Posted May 24, 2015 I did almost 10 years ago, nobody gave a rats ass. http://atariage.com/forums/topic/93743-designed-a-working-272k-bankswitched-board/ 1 Quote Link to comment Share on other sites More sharing options...
Lynxpro Posted May 24, 2015 Share Posted May 24, 2015 (edited) I did almost 10 years ago, nobody gave a rats ass. http://atariage.com/forums/topic/93743-designed-a-working-272k-bankswitched-board/ Woah. So your 5200 boards did 272K and the M.U.LE. board supported 512K? Either one would make Tempest Xtreem doable. Keithen Hayenga himself had nothing but praise for both Xtreem and Tempest 2000 when chatting at the Davis Atari Party last month. I think the Atari retro scene is probably healthier today than a decade ago. And anything that can light the 5200 retro scene's pilot light would be welcomed today... Edited May 24, 2015 by Lynxpro Quote Link to comment Share on other sites More sharing options...
DocRV Posted March 22, 2021 Share Posted March 22, 2021 Hello guys, I know there has been a very long time. Any chance to get the PCB eagle files updated with the latest version ? The site http://atari7800.net/mini-ultra/ is down. Thank you so much ! Regards, Quote Link to comment Share on other sites More sharing options...
+Mitch Posted March 22, 2021 Share Posted March 22, 2021 8 hours ago, DocRV said: Hello guys, I know there has been a very long time. Any chance to get the PCB eagle files updated with the latest version ? The site http://atari7800.net/mini-ultra/ is down. Thank you so much ! Regards, I think Bruce changed his website. His other website is http://xi6.com/hacks/ You can see if you can find it there. Mitch Quote Link to comment Share on other sites More sharing options...
DocRV Posted March 23, 2021 Share Posted March 23, 2021 Hello Mitch, Thank you for your reply. That's nice. Yes, I checked this site but there's no pcb file. I sent an email to Bruce and he kindly replied : "So I'll put it on my list of things to do to find, zip, and upload them." Keep posted then . Looking forward... Thank you all & take care ! Hervé Quote Link to comment Share on other sites More sharing options...
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