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Found 14 results

  1. I’m restoring an Astrocade and would like to build a Balcheck. I’ve reviewed the plans and photos on Bally Alley (awesome website!). I’d like to create a PCB with parts that are currently in production. Can anyone recommend a modern alternative to the 2716 EPROM used on the Balcheck device? I’d prefer an EEPROM or Flash with very similar functionality. A quick search on Mouser returned the Microchip AT28C64B. It’s larger than need but I can ground the unused addresses A11 and A12. Also I have a TL866 so I can easily program it. Btw: could the AT28C64B work for a homebrew cartridge too? I figure all the other IC’s can be replaced by a single inexpensive MCU. I’ll post the Eagle files when I’m done. Any suggestions or advice would be appreciated.
  2. Dear AtariAge forum Recently I found out interesting 3DO stuff. - In some Japanese 3DO FZ-1 theres is a single SOP44 ROM chip which does contain BIOS and Kanji fonts on the same package. The second ROM slot on the board is left blank. - SOP44 3DO ROM chips can be read as if they were 29LV160 chips (eg. AM29LV160**, MBM29LV**, MX29LV160**, ES29LV160**, HY29LV160**, the asterices being any letter) - BIOSes can be written on to AM29LV160DB and AM29LV160BB. Probably on the rest of the afore mentioned chips too. - The RSA check can be removed from the BIOS by changing the two occurrences of 000313A0000111A0 into 000313A0000011A0. It is important to leave the 000213A0000111A0 as it is. - Without RSA check all arcade games and unlicensed games will run on home console 3DOs - M2 games did not run on such systems yet and probably won't Member Tajigamer was a invaluable help during these explorations! Keep on preserving stuff, kind community! Ben
  3. I'm selling some of my prototype/eprom cartridges... Here it is the first for Gameboy on Ebay... eBay Auction -- Item Number: 171568020077
  4. As my first 2600 game is entering the testing phase, I'm hoping to have a number of cartridges made. I know that there's the option to have a custom cartridge made just like that and, while very tempting, I would like a number of cartridges made and it is sadly outside of my price range. So I was hoping to do so myself, as much as possible. Is there any explanation of what all is involved? From what I have heard, one would want plenty of existing games with little value which can be stripped down so their cartridges and boards may be used. It's all about needing a new EPROM, which are cheap to buy but must be burned with a pricey EPROM burner. So, my questions: 1. Is there any resource to explain how to make a custom cartridge oneself? If so, where? 2. How much can be salvaged from existing games? 3. What kind of EPROMs are required and where can they be purchased? 4. Is there anyone who already has an EPROM burner who would be willing to burn EPROMs for me on a pay-per-EPROM basis (with me paying for the EPROM, any shipping, as well as for the good individual's trouble)? Bulk orders in mind, here. 5. Is there anything else I should know about all this so I don't waste a lot of time and money on a wild goose chase? I'd very much appreciate any information folks can offer. Thanks!
  5. Hi, I'm working on a bankswitch card that supports multigames. I first made a normal 4k multicard using a 27C256 that holds 8 games, for testing purposes. Easy to make, and it worked fine... Because I have my own programmer, but not an UV eraser, I wanted to use a 29F010 EEprom that can be electrically erased. The pinout of this is (almost) the same as a 27C010. So I copied a few ROM's together and programmed the EEprom, but for some reason that didn't work on my Atari 2600. I used my programmer to read back the ROM file out of the chip, and tested it in Stella (32 in 1). That worked fine, so there doesn't seem to be anything wrong with programmed chip. Does anyone here have any experience using EEproms for DIY cartridges or mulitgame card, and what is the difference between using a EEprom and a normal Eprom (because the normal Eprom is working fine). Many thanks !!
  6. I didn't want to hijack the 512K cart thread, so I thought I would post this here: I actually have a cart, custom built for me by Jens-Eike (it's with him in Germany) that is a 64K bank-switched cart with 1K of ram permanently mapped in to the end of the cart ROM space (so there is 7K or ROM per bank, and the same 1K of RAM in every bank). It also has two hardware stacks on it but there's issues with the stacks - we can do a push (post increment) but pops are proving very tricky (pre-decrement) - something to do with a lack of appropriate signals in the cart port to trigger the pre-decrement, so that might not make it into the final design. We'll have to see. It's a shame because the stacks are lovely: Simply write to an address (I think it's >7FFE) and it pushes that value to the hardware stack. Do a read from the same address and it does a pop! The RAM for the stack is taken from the 1K of RAM. Of course, you don't need to use them if you don't want them, but I want them for a TF V2.x which would have a hardware stack (and thus be faster). It's currently implemented in discrete logic, but I'd be happy to hear to from anyone that is willing to tackle the problem with programmable logic. As I say, there are issues that need to be solved. I spoke with Gary Smith about it here in the UK. He has looked at the problem and agrees that it's a tricky one. He has a tentative solution using flip-flops to induce a delay (if I have understood it correctly) between detecting a read from the stack port (triggering an address decrement) and performing the read. I'd like to get the whole thing into one chip: That is: 64k ROM, 1K RAM and all logic. If anyone is interested is doing a design please let me know. Jens-Eike and Gary has expressed an interest, but it's hard to keep the momentum going - understandable enough... We all have lives outside of the TI
  7. Greetings! One of the Atari items I am interested in are homemade Pirate carts. There seems to be many of them popping up these days......the designs are as varied as the prices. I picked up mine from eBay for $15. It works on occasion. The eproms are soldered to another board and then you can plug it into the cart. And yes I am looking for more of them.
  8. Just completed my 80-track Mod. Will thoroughly check all solder points before plugging in. Which I can't do until the weekend. Hope I done good. I took lots of photos, some might make good prints for wall art. https://www.facebook.com/photo.php?fbid=10206865163899614&set=a.2902404651182.2113402.1592441926&type=3
  9. Hello at all TI99 friends.. i organized in Classic99 emulator many new software that was created from many people present here on Atari Age in many post. I hope in this mode of help all you at have an all ready collection software version,where is present many works of Mr. Gazoo, Rich and another.. Here you have in classic99 many version of cartridge game , extended basic, etc... all hard work created in that ultimate years.. In this first release i put all ubergrom file that i knew and big 512k eprom. If like i try at upgraded putting more program that you think is necessary insert.. Ermanno For use take file and decomprime in directory c: Classic99 is ready for use.. classic99(v386).rar
  10. Hello! I own a WILLEM-USB v1.5 EPROM programmer, and I can't find software, drivers or manuals. The official site willem.org does not longer exist, and although I googled and googled, I've found all Willem models but not this one. Not even an image. I've tested drivers and software for other Willem products but none of them worked. Any help would be appreciated. Thanks!
  11. Thinking (again) about updating my LPT port eprom programmer. This seems like a very complete package. Anyone? Or alternatives for say under $150? http://www.ebay.com/itm/High-speed-true-USB-Universal-Programmer-TL866CS-Full-Pack-include-7PCS-adapters-/320967107440#vi-content Thanks, Larry
  12. I have 15 ST-branded M27C256B UV-erasable EPROMs and a Minipro TL866 chip programmer. The chips came as used off Ebay. When I try to program these chips, I get this: $ minipro -p "M27C256B @DIP28" -w cleurom2.bin -S Found Minipro TL866A v03.2.80 Chip ID OK: 0x208d Writing Code... OK Reading Code... OK Verification failed at 0x200: 0xc8 != 0x00 I thought that this was due to this particular variation of the 27c256 requiring more current than the Minipro burner could provide. So I bought a cable that has two male USB type A plugs on one end and a female type A jack on the other end. I've used variants of this for older hard drive enclosures that needed the extra current. This didn't help in the slightest. All of them fail programming in exactly the same way. Erasure goes fine. I've programmed several 27c256 chips from Texas Instruments with no problems. What's going on here? Am I better off simply trashing these chips?
  13. Hi everyone, I was wondering and checking which Atari 2600 game carts I could open and re-use for my 4k homebrew. The idea would be to simple de-solder the EPROM (?) and replace it by a 2732, 2764, 27128 or whatever. Are there games known to have a pin compatible layout? I can burn these standard EPROMs but I would prefer not to produce new PCBs. Any ideas/suggestions/help appreciated Also if carts are known that require some changed wires or such -that would help. I am talking of very small numbers here, not mass-production of any kind. I.e. Star Voyager has some single chip on the PCB (no capacitors or such) that I fail to identify unfortunately. Thanks alot, Martin /enthusi
  14. I've got some old cartidges lying there, so I looked inside. I found out that basic cart has both of roms socketed so it would be great to get same EPROMs and burn there some old game to be played on my 16k 400. I currently don't have access to programmer (will have on wednesday) so I can't detect them (not sure if those old works, but 27512's does). So which ones are they and why are there 2 of them? Because they were cheaper than bigger ones or ?
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