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Found 5 results

  1. Hello AtariAge community, I am hoping some of you could provide some insight into a problem I am having with my Atari 1050 floppy disk drive. For years the drive has worked seamlessly with my Atari 800 XL... but when I pulled it out and started it up just recently, I only got one successful boot out of it, and it hasn't worked since. I know this is rather open-ended, so I will provide some information on what I have tried so far. I cleaned the reader heads, so no problem there. I heard that the read arm is supposed to travel the full length of the read track upon initialization of the device. Whether this is correct or not, my device does not do this. It travels maybe a fourth of the way and then back. I tried the following program which I grabbed off of another forum: 5 GOSUB 1000 10 POKE 769,1 20 POKE 770,33 30 POKE 772,0:POKE 773,64 40 Z=USR(1536,58451) 50 ? "FORMAT STATUS ";Z 60 FOR R=1 TO 30 : POKE 778,R : POKE 779,0 70 POKE 772,0:POKE 773,64 80 POKE 770,82 90 Z=USR(1536,58451) 100 ? "READ SECTOR ";R;" STATUS ";Z 190 NEXT R 999 END 1000 A=1536:TRAP 1030 1010 DATA 104,104,133,213,104,133,212,32,17,6,132,212,169,0,133,213,96,108,212,0,-1 1020 READ D:POKE A,D:A=A+1:GOTO 1020 1030 RETURN This program formats the disk, then gives a status number in return. It then checks individual sectors from 1 to 30, and gives the read status. During the formatting process, the arm moved the full length of the floppy disk and appeared to be doing exactly what it should, however during the read phase, the disk drive reader arm did not move at all until the 21st sector or so, where it began to twitch with each sector read. Still every transaction with the drive returned a status of 144, which is a "Device Done Error" according to this website: http://page6.org/archive/issue_22/page_10.htm. "This error occurs when you have issued a valid command to the peripheral but the device is unable to carry it out" the page says. I have received a request from a friend to replace all electrolytic capacitors, because even if they do not burst, they are prone to drying up over time. Does anyone want to support or deny that statement? If so, is it possible that the caps dragged other more important (and harder to diagnose) components with them? Sorry for the load of information, but any help on where to start with this is greatly appreciated. Thanks, BitFracture
  2. I have a chip that gets warm when the unit is powered on. I believe this is causing a problem where nothing happens when I insert a cartridge and hit Start. This may have been caused by a defective power supply which has been replaced. The monitor is good. I swapped the chip to another location with one that wasn't getting warm to confirm the chip was the problem, not the location. Does anyone know where I can get a replacement chip to see if this fixes the problem? The chip is a Mostek MK4564N-15IRL and was originally in location U15. There is also another number C060612-009. I think this is a memory chip, but I don't have a schematic to verify. Any suggestions would be appreciated.
  3. Hi, I have a Commodore 64 which I was able to expand to 4 joystick ports using Protovision 4 Player Interface http://www.protovision-online.com/hardw/4_player.php?language=en Is there an Atari 800 XL equivalent solution, Thanks
  4. Hi ! Although I am new around here, I thought everyone might like to have a look at my small, but modest Atari 800 XL collection. It started off as a trade for an unwanted handheld console, after seeing the machine in action and remembering playing one, way back in the 1980's at a friends house. Hardware :: The Badge The Atari 800 XL The beautiful polished metal buttons ... Atari XC12 Tape Deck Competition Pro 5000 Joystick Software :: Mastertronic Games Cartridges : River Raid and Pac-Man You may also like to know that I collect Mastertronic Tapes, currently for the Commodore 64. I am considering the Atari as well, although I will have to find out how many were released. There are around 239 for the Commodore 64 and I have 216. The closer to finishing the collection, the harder it gets, as a few are more difficult to come by. I have a blog which you can follow at : [ http://allthingsmastertronic.blogspot.com/ ] I will post Photos of my Commodore Hardware soon as well, Commodore 128, 1541-II etc. If you would like me to reduce the size of the Photos, I can, but it is also nice to see the kit its glory ! Cheers !
  5. I have an old Atari 800 XL in great condition, but it only seems to display readable video output on my Zenith monochrome monitor. When I plug the DIN to A/V cable into any TV, I get the color channels horizontally separating several pixels, which makes any fonts or other small sprites rainbow and blurry. I was hoping I could get some information on what causes this, if it is incompatibility with new TV's or the video chip messing up, I'm not sure. All I know is that my monochrome monitor displays things perfectly. I have heard something about NTSC vs. PAL and I really don't know which this machine is or what difference it would make considering one of the TVs I tested the machine on is European. Thank you to anyone who can help me on this. I can provide pictures if requested. Thanks, BitFracture
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