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AtariGeezer

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About AtariGeezer

  • Birthday 09/05/1959

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    Santee, CA
  • Interests
    Electronics, Computer Programming

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  1. Found it: https://www.atariarchives.org/cfn/05/11/0002.php About 2/3 down the page....
  2. Wish I did, I bought those chips from Bradly...
  3. Have you seen these SC-01 replacements? https://www.ebay.com/itm/276185219566 Which other parts?
  4. That sounds like something they would have used in the original BattleStar Galactica Here on earth we call it acetone...
  5. Welcome back David I can relate to what you are dealing with, in one accident I developed bone spurs om my shoulder which prevented me from elevating my right arm past 90 degrees. Did you see any white balls on your shoulder X-Ray? If so. you could try Acid-A-Cal (calcium deposit dissolver), it took a few months to get full use back again... I have metal in both arms too, great for weathervanes
  6. The above pic is from the 1450XLD Hand Drawn Schematics for reference on the modem circuit. And yes, these are TONG... 1450XLD Hand Drawn Schematics.zip
  7. Vandal968 didn't check the datasheets I guess... The TI modem does use +12v at VDD, plus +5v and -5v. So W3 on silkscreen, W4 on schematic (+12v) is used here... W4 on silkscreen, W3 on schematic is used to tie pins 15 and 17 on the National 74HC942... I made a schematic for the TI daughter board, but can't find it at the moment. 74hc942.pdfTMS99532A.PDF
  8. Yep, the silkscreen has W3 and W4 backwards. A note to builders: W3 0 ohm, For National Modem 74HC942 W4 0 ohm, For Texas Inst Modem TMS99532 U35 layout is a direct placement for the 74HC942, the TMS99532 Has To Be Used On A Daughter board... U35 pin 12 VBB should go to -5V, not +12 as in Jerzy's schematic.
  9. This happened to my Falcon030 and an old IBM PC I used in the USAF. What worked for me was to repeatedly turn-ON the Atari, then OFF on the fist sign of it not booting, turn it off then right back on. It wakes up the HD from it's deep sleep...
  10. Did you swap the part numbers for Q3 and Q8 and change R141 to 1k instead of 100 ohm?
  11. I have compared these to my back engineered schematic of the wire wrap design of the Parallel Disk Controller and found some of the missing circuits.
  12. If the price is still around PLN 640 for two from Simius, I'll have to wait and buy from him this time as $230 would be a bit high for me at the moment...
  13. Please put me down for two: Atari 800 and 800XE... Thanks, Jay
  14. Had to check which clock cart I have and yep, it's a DeskCart! Just downloaded the files for this... Thanks
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