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xrbrevin

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Everything posted by xrbrevin

  1. and await the personal abuse from the author 😁
  2. either a baseless attempt to distract people from the real reason(s) why there is negativity or a textbook paranoia case from someone who knows their behaviour is not entirely 'wholesome' ..or both? V61s product range has a few attractive items but the pricing just motivated me to learn how to make my own carts 😁
  3. great fun! not an easy game so its a delight to see it played well 😁
  4. since it worked properly for a while, i would consider the power supply or GTIA/ANTIC issues. check the output voltage is not too high or too low - try another PSU if you have one. Any socketed chips ought to be removed and all contacts cleaned with contact cleaner
  5. sounds like the sdrive Max is getting power but no signal check the middle pin on the bottom row of the SIO port (it is named 'command') and any associated components. if nothing looks damaged, maybe the chip that manages the SIO port could be the culprit? The PIA chip pin 19 is listed as 'SIO Command' but im sure the pokey chip also has some influence over the port..
  6. Huzzah! theyre made of tough stuff! 😁
  7. yes the spectrum ports are great but i find it ironic that the coding originates from a Z80 computer and not a 6502 one..! 🤔
  8. I bought some motorcycle parts from a seller in finland and got some licorice pipes
  9. glad you got the thing sorted! 😎 people obtain DRAMs from ebay and aliexpress
  10. try here: https://atari8bit.net/projects/cart-labels/
  11. do you have another 16k memory module to swap in?
  12. would the sys-check device by @tf_hh work on the 1400XL? if so its a worthwhile purchase
  13. thanks for the response. if you could upload the schematic that would be great. I am aware that a number of DRAM pins are common between the whole group but some are not. Id just like to be as clued as poss before getting the multimeter out
  14. A ROM can be replaced with an EPROM if have a burner? RAM chips can be piggybacked to identify the faulty culprit
  15. Very homebrew looking indeed but high speed SIO is a great mod! Is the 800XL an 800XL'F' model? i.e. it uses the Freddie chip for memory management? I only ask because i spotted the mysterious plastic blanking plate at the back of the case that the F models seem to have.
  16. I am trying to revive an aftermarket 32k RAM board for my 400. It is the type that uses 16x 4116 DRAMs. I desoldered and socketed all the chips and found 1x 4116 chip was at fault. My TL866 EPROM programmer says that all the 74LS chips are good but the board still fails to boot. As these PCBs are not the best quality, I'm wondering if I lifted a track that would need to be bridged. Does anyone have a schematic diagram for a 16x 4116 chip type 32k board? I need to do continuity checks across the DRAM pins but i could do with some knowledge before I commence. Thanks in advance!
  17. it would be a great little device if, like you say it could do over disk 100 images is there any way of contacting the designer to see if he can make a Mk II version?
  18. try to read the disks with another drive if you can the alternative is to record the games onto working blank disks, remove the actual disks from the sleeves by breaking the bond. swap them over then glue the flap back down
  19. there are many options depending if you have soldering skills, do you want extra ROM slots too.. check the profile of user: @tf_hh check lotharek's site a device called 'antonia' replaces the CPU and gives you selectable RAM and ROM versions/types there are others that give you a fixed 256k, 320k, 576k, 1088k but the more modern upgrades allow you to select between any of these.
  20. there is a reset switch detailed in the attachment but i dont know how itll affect the Happy mod Atari Drive Select and Reset.zip
  21. Such a sad loss for the community, his contributions were immeasurable and will not be forgotten. Best wishes to his friends and family.
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