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  • The (hopefully) weekly rant
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  • BubsyFan101 n CO's Pile Of Game Picks
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  1. I was starting to add information about RAM upgrades, for the 400/800 series of machines, to the website I'm building for Atari Hardware. To my dismay, I've found there is very little in the way of documentation for commercial upgrades available online in this area. The only one I've been able to find thus far is the 400 48K RAM expansion instructions. Looking at the Atari FAQ (and from my own recollections of conversations on these forums) I know there are many more that were available. I have documentation for the Axlon RAMPower 32, which I'll be scanning. Does anyone else have 400/800 commercial documentation that they can scan and contribute to the community? Also, pictures of the live modules would be nice for the record as well. I have found pictures on AA of some modules such as: Chrystal Computer Products 256K RAMCard, Mosaic 32K RAM Board, and a few others; but no documentation for these. Any help is greatly appreciated.
  2. I ordered a few MCM6801P chips because I had traced a fault back to the RAM on one of my boards. This is what came in the mail today. Anyone remember these?
  3. 130XE that was upgraded to 320K (sometime in the past) exhibiting intermittent RAM Test Failures. Sometimes it passes, sometimes one block fails and sometimes a different block fails. I've cleaned the board with alcohol and replaced the main filter cap, C1. Power supply is new from Brewing Academy. I reflowed the power switch connection, removed the SIO caps and reflowed one loose bodge wire. But I haven't touched the rest of the bodge wires yet. It looks like I'd have to remove and replace most of them since they are so tight against the chip connections. Photos are attached for your entertainment. Any advice in troubleshooting (or an alternate path for repair/upgrade) is welcome. Note: This machine has a Omniview ROM with a selector switch mounted in the case. Note 2: I've been using Side3 with this machine. When cold, the machine will boot to Side3 SpartaDOS, Atari stock OS, Omniview XE OS or a Qix 8 Bit game cart just fine. But it has a heck of a time booting to the Side3 Loader screen until the computer has been on for a few minutes. Even when warmed up sometimes the machine will lock up or not load games.
  4. I haven’t seen anyone talk about this, so it may be limited to me. But my Atari VCS always crashes the windows whenever I have too many things open. I have the RAM that came with it and I heavily adjusted the BIOS settings, it may be something I changed in there since I don’t know everything that I changed but I made sure to be careful and do research on most things. If I can remember correctly, I adjusted the BIOS before even transferring my data from my old PC to my new one, so it may be a BIOS setting. I can’t run a web browser and have a big game open. It sucks. It has to be on my end because no one has said anything. If this were with everyone else, people would be mad about it and call the VCS bad. I hate this issue, I like to read wikis while playing games but now I can’t do that. I can’t develop games and read coding tips at the same time. Please help, I need to know what’s wrong. I have the RAM Overclock setting enabled and set to 1200hz and before I had it set to 3000hz, I tweaked the BIOS a bit earlier, so it may work. But probably not..
  5. Hi, some weeks ago another ABBUC member ask me for a way to update his Atari 400 to 48K main memory. Until the end of 2016 mostly I prefer the usage of the genuine Atari 400 48K Factory Upgrade Kit - Atari part number CO61553. BEST Electronics offer them until somewhere up to the end of 2015 for approx. 25 USD each w/o any additional parts or manual. In 2016 the price rises up over 35 USD and now it´s sold out. Due to this impossible mission to get more of the CO61553, I create my own solution - even better than the original Here´s the Atari 400 48/52 KB RAM-Card with "external" OS-ROM support using standard EPROM sizes: This card is a full replacement for the 16 KB built-in RAM card. At least only two wires must be soldered at the bottom side of the Atari 400 mainboard. My RAM-card uses the same pinout like the CO61553 by Atari, but only 2 of the 4 wires suggested by Atari are really needed. But it works also, if you have already equipped an Atari 400 wit the CO61553, you can easily change to my RAM card, if you want. The 74LS243 chip has to be removed, it´s not needed any longer. After soldering the 2 (or 4) wires, just plug in the DIL connector into the socket were the 74LS243 was before, the other end has to plugged on the new RAM card. That´s all. The new RAM card uses SRAMs instead of DRAM and provides 48 KByte or 52 KByte main memory. When enabling the 52K RAM mode, the address range of $C000-$CFFF is also RAM. Please remind, that this area isn´t usable under BASIC (or, to be more precise, I didn´t know about that). A jumperfield on the PCB let´s you choose which size is active. The second new feature is the possibility of using a standard 27128 or 27256 EPROM for the operating system (and math-pack). When the "external" OS-ROM mode is enabled, the three ROMs on the Atari 400 mainboard won´t be used anymore. You can remove them or leave it in their sockets. The EPROM´s first 6 KB are unused, then 2 KB math-pack will be followed by the 8 KB OS-ROM code. A third jumperfield switches the highest address line A14 of the EPROM, so you can hold two different operating-system sets in one 27256 EPROM. What you get? - PCB "Atari 400 48K/52K RAM Card" with ENIG (Gold contacts) surface levelling. Picture shows only standard HASL, but I offer only the better quality with ENIG. - Ready-for-use crimped ribbon cable for the 74LS243 socket to connect with the RAM card - some wire for the 2 or 4 solder connections at the Atari 400 mainboard´s bottom - Installation instructions with pictures in english, sent by email Price? - from 20 up to 25 euros each depending on the amount of orders - Shipping costs to any place in the world for up to 5 pieces is 9 euros Schedule? - Please show your interest and how many you want to order here in this thread - I will collect inquires until 2017 July 2nd (end of date) - If 10 or more orders will be placed, everyone who´s interested get the payment details - Shipping out at the end of July 2017 Best regards, Jurgen
  6. Well I figured this is probably the best place to ask. I got an atari 600xl a year and a bit ago, didn't come with a power supply and didn't get one till about 6 months ago. I got some cart games and software to play around with and when I was messing with the self-test, the RAM test kept going for a long time, up to 48 blocks of RAM were tested. Concerned that there was a bad RAM chip, I opened up the machine and discovered a massive Applied Engineering RAM daughter card installed over where the stock RAM would've been. I thought Applied Engineering only produced upgrades for the Apple II, Mac and Amiga machines? I looked up the data sheet for the RAM chip type on the board, and it turns out there's a bunch of 4K chips that add up to 64K total. Can someone shed some light and tell me what the hell have I got? An apple II upgrade that was modified for a 600XL, or an actual AE stock product sold for the 600XL? Will post pics later when I crack the machine open again.
  7. I have an abused 130XE that was failing memory testing. I removed all the RAM and went back with sockets. I now have the first bank of RAM in place and thought I would test before the 2nd bank is in (because I have not soldered the sockets yet on the 2nd bank). Will a 130XE boot with only a single bank of RAM (essentially with 64K instead of 128K)? OR do you need to make a mod to do so?
  8. Aside from test cartridges, is there a testing program that can exercise the Intellivision’s SRAM (RA-3-9600), and give it reasonably accurate good/bad result? I recently repaired a system that had a bad SRAM but the test carts were not reliably detecting or identifying that chip as the culprit. Thanks!
  9. Select all the different memory configurations for machines you own (multiple selections possible). Include any plug-and-play devices used to boost memory too. I've probably missed a few esoteric upgrades. If you don't see yours, just pick the next lower amount on the list. I know there are upgrades far above 1088K, but memory above 1088K is pretty meaningless at this point -- other than bragging rights. If you have something that isn't mentioned and you want to talk (or brag) about it, go ahead and post. You can also post about your specific memory upgrade type if you like (i.e. Rambo 256K, etc.).
  10. I have a 130XE that boots straight to the memory test and shows all red and some orange (instead of green). Before I unsolder, socket and replace the 16 memory chips I wanted to ask if there are other memory options for the 130XE. Questions: 1) Could I just install an Ultimate 1MB upgrade? OR does U1MB require the underlying default 64K (or 128K) to be available and functioning? 2) I see the '64k SRAM Module for XL/XE' upgrade on The Brewing Company site. Could I use this to get to 64K of RAM and just leave my faulty RAM on the board? Obviously this would only give me 64K rather than 128K but then I suppose U1MB could be installed. 3) Other options short of replacing the original 16 memory chips?
  11. I've seen articles about putting RAM on the 16-bit part of the bus to gain some speed, and am thinking of building one. However, I'm not sure about being able to fit it under the RF shielding clamshells. Ideas? What kind of metal are the clamshells made of? Is it readily available? K-R.
  12. What would happen if code was running in RAM and hit address $00ff? (assuming the stack was clear or saved)
  13. Hey guys, I am just discovering games such as Bomb Jack http://www.atarimania.com/game-atari-400-800-xl-xe-bomb-jack_20831.html Titles like this make me want to upgrade my 130XE to 320k. I want to put new games like this on an Atari Max cart and play them on my 130XE. Thinking of getting one of these awesome devices: http://atariage.com/forums/topic/232856-ram320xe576-order-thread/ So here is the question. How many games currently available use 256k or 320k of ram? Does someone have a list? I would love to make up a 256/320k game multicart. (after I figure out memory upgrade)
  14. Got an Astrocade without having any guarantees about it working and … wouldn't you know … no worky. It teases. It taunts. Sometimes on boot I get garbled but mostly visible screen, other times a screen like figure 3 here, which then does various strange things. I've attached image and video here. Is it a doorstop? Or is there hope? I haven't gone through the service docs yet or opened it up - it's totally new to me. It came with two extra controllers as well as a nice selection of games, the box, and several game manuals. Thanks for any tips / advice! Atrocade-NoWorky.mov
  15. I was pouting over the lousy 64KB of ram in my 65XE the other day and decided to look into expansion options. It's one of those without the ECI port, so it would need to be an internal unit. Looking at what was out there, I wasn't very happy. How about I try my own hand at it? Here's my initial thoughts on the matter. The idea is 1) it must use the "standard" CIA PORTB for bank control, 2) it cannot interfere with the normal operation of any of the bits, and 3) it should support CPU/ANTIC bank control. I looked at the memory available online... what do you know, there's a 2Mx8 5V 45ns SRAM from Digikey for about $5. Two of them would fill out a full 8 bit bank select just peachy. But how do you get 8 bank address lines from the port without interfering with the operation of the bits? A latch comes to mind. And that's the main thing - a hex D-Type flip-flop. Clearing PB7 will clear the latch, so asserting the self-test ROM will just clear the latch. No problem there. I use PB6 as the flip-flop clock (latched on rising edge). So if this were in an XEGS, clearing PB6 enables the Missile Command rom, which wouldn't be an issue as long as the code to switch banks isn't in either the bank memory space or in the rom cart space. No problem there, either, especially on systems without Missile Command. I use PB5-0 as the inputs to the d-flip-flops... no problems there as long as the code to switch banks isn't in bank memory space, the cart space, or the OS ram space... so in the first 16KB; oh, and the ints are off unless you keep the int code and data in the first 16KB as well. Still not an issue. But how do I get 8 bank address bits from 6 latched bits. Well, just use PB2 and 3 as normal. The latched bits extend them from 2 bits to 8 bits. Use A21 and it's inverse to select one of the two sram chips, use PB4 and 5 along with A14 and A15 and /HALT to generate the other chip enable, a few gates for output enable and write enable and Bob's your uncle. The prices in the pic are from Digikey in single unit quantities for surface mount parts. A handful of bypass caps to round it out at less than $15 in parts... minus the board. That's gonna be the "fun" part. Been a while since I made a board. I'll update as I get further along. Comments and suggestions are appreciated.
  16. Hi All. First time poster here. I recently bought a Bally. It has the overheating problem, but with a laptop cooler and having removed the RF shield it seems to run fine enough to play games without crashing. However, it has permanent, frozen stuck pixels at the top of the screen in the MENU screen and in every game (see pics). And these pixels annoyingly interact with and affect the game mechanics. Allen has been nice enough to work with me and suspects a RAM issue and suggests replacing the MK4096N-15's I have. I'd like to keep de-soldering and soldering to a bare minimum so does anyone know which of the 8 physical RAM chip of U24 to U31 would relate to the top of the 1/8th of the screen with the screen map? According to the Nutting Manual the screen RAM takes up 4K and there are 102 lines on the screen with each line using 40 bytes. So would it go sequentially top to bottom starting from U24 with each chip representing about 13 screen lines or am I missing something? Thanks, Cliff
  17. What are the different models that I could best buy? 400 - 8k of 16k machine and can be upgraded by adding extra memory in the slots of the machine. This was marketed as a gaming machine which it's design to an extend shows as it's a light weight 800. 800 - 8k to 48k machine and can be upgraded by adding extra memory in the slots of the machine. 600XL - 16k, easy to upgrade (if socketed) by popping in new ram chips and soldering a couple/few wires, depending on the method. 800XL - 64k, the most common - almost ALL software will work on a 64k XL...some 1990s (and onwards) demos and games require more ram. almost ALL Taiwan 800XLs are soldered - which makes upgrading harder. 50% of Hong Kong 800XLs have socketed ram. 1200XL - 64k, the easiest to upgrade, but easier to buy in the USA than europe. most ICs are socketed which makes installing a 256k wizztronics clone, Ultimate 1mb or the newer Antonia 4mb upgrades much easier. almost all 1200XLs will need a clear pic, UAV or similar upgarde to make video reasonable. 65XE - 64k, an XL with ST styling - many do not have the ECI port. 130XE - again, an XL with ST styling, but with 128k ram. 800XE - 64k, eastern european crossover from XL to XE range - some (about 30%) of these have a buggy GTIA chip, but if you strike lucky you get a nice "XL" with freddie chip and ECI. XEGS - 64k, a consolized 65xe. Why upgrade RAM? To either gain access to 130XE library and to more modern demo's, games, etc. Different RAM standards and why do they matter? Plain and simple comparability as some RAM upgrades have different memory adresses, which means some software might not run or not run correctly under a different standard. Can and is it worth it to upgrade my RAM by filling out empty RAM spots on the motherboard on my 65xe or 800xe? Yes, if you have those slots and if you don't want to go all out on the RAM or keep your machine like it was during the machines production life. Watch out for the faulty GTIA's though. You can check for those buy typing in : 10 GR. 9:D=1:FOR X=0 TO 79 20 COLOR C:C=C+D:IF C=15 OR C=0 THEN D=-D 30 PLOT X,0:DR. X,191 40 NEXT X 50 G. 50 And you should end up with something looking like this: or using my own computers as an example: http://imgur.com/gallery/bAOr0 This is how you can upgrade: Which RAM upgrade kits are still available? (mainly available for 800XL and later models, unless noted otherwise) Ultimate 1MB http://lotharek.pl/product.php?pid=67 ​wizztronics 256K http://www.best-electronics-ca.com/wizztronics%202_256.htm Rambo XL 256k https://www.bitsofthepast.com/?product=reimaged-rambo-xl-adapter 512k SRAM-Extension by Mega-hz: http://mega-hz.de/Angebote/512K/512k.html Due to some upgrades going through production runs of batches and than going out of production until another is announced these might not be available at the time of reading (You could always try and message the creator if they are available still or in the future): 512k SRAM-Extension by tf_hh: Write tf_hh a pm here on AtariAge Syscheck II by tf_hh: Write tf_hh a pm here on AtariAge (only works on 64k machines and higher) Ctirad 576XE http://atariage.com/forums/topic/232856-ram320xe576-order-thread/?hl=%20ctirad (No soldering required, up to 576k of RAM and please not "up to" as it requires you atari be on 128k of RAM before slotting it in to get that amount, otherwise you won't get 576k) Incognito Don't know where it is available (only for the 800) Antonia 4MB http://atariage.com/forums/topic/249405-new-4mb-ram-expansion/?hl=%20antonia (I assume there is a newer location that sells them that I'm not aware of) (please note, the Antonia has 2 different versions one for the XL line and the other for the XE line) (Please note I've excluded older upgrades and self build upgrades, like this, for simplicity reasons, otherwise this would become a very long list. But as wizztronic or Rambo diy build are most common; the chips needed for that are require a 41256. http://atariage.com/forums/topic/122470-ram-upgrade-applications/page-2?do=findComment&comment=1481893) If you have information to add, rectify or remove, please comment so I can change it. Resources: http://ataripodcast.libsyn.com/antic-episode-39-i-need-more-memoryFrom 1:05 Nir Dary talks about RAM upgrades which is a similar to this post. Great podcast overal but that segment is good if you want to know about memory upgrades without this wall of text.
  18. Hi everyone. I am hoping someone will recognize the issue I'm having with my Atari 800. I think I've narrowed it down to bad RAM, but before I spend any more money I'd like a second opinion. The machine was given to me by a friend who had had it in storage for many years. The plastic chassis was destroyed and I had to disassemble and rebuild it, but the PCBs are all intact and the machine started and was able to run BASIC and other cartridge-based software perfectly. I was also able to load a game from cassette a couple times, though the belts in the cassette decks I was sent degraded rapidly and that stopped working. I recently bought an SD2SIO, and the machine came with an Indus GT. I set to testing these this week, but I can't get anything to load. The specifics of it are peculiar, though. The SD2SIO is set up to load the menu immediately on startup. When I power on the machine, it hits the SD2SIO, spins for a moment, then loads the menu and shows the files on the card. At that point the machine freezes completely. I have tried every possible input - Ctrl+Arrows in particular - and nothing works. The System Reset button also does nothing, which leads me to suspect the CPU is completely hung. When I first tried this I chalked it up to not knowing how to use the SD2SIO and stowed it for a while. I received a cable for hooking up the Indus GT and tried it out finally. I have several disks that should be bootable - a couple boxed games, some commercial applications and some user-created disks labeled as applications. In all cases, when I start the machine the Indus sets to work reading the disk and, for several of the titles I've tried, succeeds in getting a title screen up, but then either it prints an error message or corrupt graphics, the machine hangs, or the screen becomes garbled. Obviously the disks could all be old and tired, but they appear to have been stored well in their original boxes and sleeves and my gut says it's unlikely that they're all bad. The errors are also 100% reproducible, they always fail in exactly the same way for each program. I have cleaned the heads on the Indus. My hunch is that there's some bad RAM a few kilobytes in - since everything seems to load the application data okay but then fritzes out when trying to load content, I'm guessing there's good RAM where the base program code goes but something's fried up where the bulk data tends to get loaded in. The machine has a 16K stock Atari RAM cart and a 32K third party expansion. I've tried all combinations (just the 16K, just the 32K, and swapping the two) and it just changes the way the errors look. My assumption is that the 16K RAM cart has a bad chip, that the 32K RAM cart is not wired in a way that lets it correctly replace the 16K (hence testing with that doesn't solve it), and that I just need to get a new 16K card and I should be golden. Let me know if you think I'm on the right track. Thank you! Here's some pics. Card layout SD2SIO (just hangs here) What happens when I try to load some of the disks I have What happens when I try to load a couple programs that appear to have error handling Funky RAM addon
  19. I've seen some topics on upgrading the RAM in a 600XL, and by that, I'm assuming it turns the computer into an 800XL. Since I am using my 600XL for gaming, is there any point in doing so? Will games run faster / better on an 800XL than they would on a 600XL?
  20. We are currently trying to find out, how real hardware behaves in a certain corner case. That is: Reads from SuperChip extra RAM using a write address cause unwanted writes to SC RAM. The exact values written are what we are looking for. Attached is a F8SC (8K + SuperChip RAM) ROM which returns different results in Stella, Stellerator and (my) console with Harmony. Since we do not know what affects the results (console type, cart used) we need your help. Especially if you are able to put the ROM onto a physical cart and/or have multiple consoles too test. Please post your setup and resulting pictures here. Thanks in advance! testSC_1_f.bin
  21. I have a 800xl with red screen issues but i have silly question as im new to ataris. can i use the 1200xl ram in the 800 to test the ram chips?
  22. 32K RAM pulled working from a TI-99/4A Peripheral Expansion Box. Includes manual. Also have a non-working Flex Cable Interface. I'm told it is "probably" an easy fix (replace a couple of chips and capacitors.) Don't have the ability to do this myself as my hands are not steady enough for the solder work. I do own a cat, so apologies, but please expect some cat dander 32K RAM card: Asking $50 plus shipping & PP fees. SOLD Flex Adapter: Asking $20 plus shipping & PP fees. SOLD Will consider reasonable offers.
  23. So I was puting away my 2600 when an idea hit me, what if there was an advanced passthrough cartridge almost like the sega 32x. Here's a list of features it could include. -Built in bios -Extra 64k ram -Cartridge pull out protector (If you pull out a cartridge, it will reboot to the bois) -Sid chip (so we can finally have better music in our games) -Upgradeable -Dpc+ and Superchip compatible I would love to do this myself but I'm not very good with electronics nor do I have the budget to do it. XD
  24. Hi, I've recently begun fixing an old nonworking TI-99/4A and concluded that the problem I'm facing most likely is in the RAM section of the board. Before I buy new RAM chips I'm wondering what the difference is between models. I have the MK4116N-2GP chips but I can only find MK4116N-2 chips. Can I replace the old ones with a different model?
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