Jfcatari Posted March 3 Share Posted March 3 I recently built a Remake 800XL..it was a real joy to do this with donor parts from a 600XL. The video output, especially the svideo is great! 3 Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 5 Share Posted March 5 May I ask if anyone can share the hex file to program the SST39SF010 (either bank)? Many thanks! Quote Link to comment Share on other sites More sharing options...
Jfcatari Posted March 5 Share Posted March 5 I have what I flashed for BANK 0 and will post it later today. I think I also have a copy of BANK 1 too from @reifsnyderb Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted March 5 Author Share Posted March 5 Here's what I have on mine. OS R3 (with self-test banking fixed) and Atari BASIC C on bank 1. Bank 2 should have a pre-release of OS R 6.2 and Altirra BASIC 1.58. ROM.BIN Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 5 Share Posted March 5 Thanks. This is awesome (and I'm learning much). Trying not to be a PIA... Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 7 Share Posted March 7 (edited) Board complete - not booting. The 5 Atari LSIs are good as I check them on a working Atari 800XL. Reading Vcc of like 4.5v on the all the chips. AND you can see this on the clock below (measured at W2). So with that overshoot / undershoot (or negative shoot?), there must be a short or something consuming to much current? And should I remove all the ICs to isolate? At least its firing at the correct frequency of 3.57... Any help is greatly appreciated! Edited March 7 by CJ Atari Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted March 7 Author Share Posted March 7 I'd remove all IC's. Check VCC again. Check for any shorts between pins. Are you sure the ROM was flashed correctly? Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 7 Share Posted March 7 Thanks - will do. I flashed your .bin file using default settings in the T48 TL866-3G programmer (noting I'm not super experienced with this). Thanks! Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted March 7 Share Posted March 7 4.5 is too low, something isn't right. Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 7 Share Posted March 7 Ok - the clock overshoot is a manifestation of the oscilloscope / probes most likely based on some research. But the low voltage is a problem. And just adding its on me to fix, not looking for mega-help. Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted March 7 Author Share Posted March 7 5 minutes ago, CJ Atari said: Ok - the clock overshoot is a manifestation of the oscilloscope / probes most likely based on some research. But the low voltage is a problem. And just adding its on me to fix, not looking for mega-help. Did you check all solder connections? With all chips removed, check continuity between pins to make sure there aren't any hidden bridges under the sockets. 1 Quote Link to comment Share on other sites More sharing options...
+scorpio_ny Posted March 7 Share Posted March 7 4 hours ago, CJ Atari said: Ok - the clock overshoot is a manifestation of the oscilloscope / probes most likely based on some research. But the low voltage is a problem. And just adding its on me to fix, not looking for mega-help. I would also check to make sure any diodes are not put in backwards. 1 Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 10 Share Posted March 10 So it booted. Got a faint "Pac Mac" on the screen when booting from that cartridge. Cold or non-existing solder joints based on microscope scan I did. Diodes okay. Audio not coming through and video is very faint. Will keep working - will get there. But if we get to Pac Man home screen - a good sign (right?). And Basic prompt too but video issues... Thanks for listening - having fun. 2 Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted March 10 Author Share Posted March 10 13 minutes ago, CJ Atari said: So it booted. Got a faint "Pac Mac" on the screen when booting from that cartridge. Cold or non-existing solder joints based on microscope scan I did. Diodes okay. Audio not coming through and video is very faint. Will keep working - will get there. But if we get to Pac Man home screen - a good sign (right?). And Basic prompt too but video issues... Thanks for listening - having fun. Sounds like progress is being made and you are starting to find the problem. I'd re-flow every solder joint. Hold that soldering iron on each joint until it melts then count to at least 5 before removing the soldering iron. 2 1 Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 13 Share Posted March 13 Here's a screen shot - its Pac Man of course. Audio is great, it boots carts and into basic. Something is up with the video (duh). I have used a wide variety of cables and s-video to HDMI converters. In this picture, I am using Lotharek's monitor breakout (L, R, CV and S-video) to an S-video cable to the Scart input of a MEDUSA - SC. I double checked the components, tried a couple of 4050s. Any ideas? Many thanks! 1 Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted March 13 Author Share Posted March 13 Are you able to connect to just S-Video or composite video, without any converters? Quote Link to comment Share on other sites More sharing options...
+scorpio_ny Posted March 14 Share Posted March 14 (edited) Hi @CJ Atari, Any chance you can post a picture of the motherboard? Is it possible that maybe something was missed? Like the NTSC jumper for NTSC video for example? Edited March 14 by scorpio_ny Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 14 Share Posted March 14 I don't have am S-video display noting all other 800XLs have worked with my converters. The two jumpers for CV don't seem to change output and I don't believe a CV signal is coming through the monitor port. The board pics are here. I did clip out the RN that was unnecessary (after installed), never did install any PAL devices, and the jumper - W2 is installed. I used that to measure the clock. The jumpers for U26 (4 of them) are soldered on the board's underside. It must be an incorrectly-inserted (of faulty) component of some kind? Thanks! 3 Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted March 14 Author Share Posted March 14 (edited) JP7 needs to be installed for composite video. Edit to add: It's hard to tell, but the solder joints on the color transistors may need checked. Edited March 14 by reifsnyderb 1 Quote Link to comment Share on other sites More sharing options...
+mytek Posted March 14 Share Posted March 14 I don't wish to interrupt your troubleshooting but I gotta say @reifsnyderb your 800XL remake board design is exemplary. I love how everything is grouped into logical outlined blocks, and that you provided 3 prototyping perf board areas 👍 2 2 Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 14 Share Posted March 14 Thanks reifsnyderb. Def adding jumpers for CV and will check the solder joints. Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted March 14 Author Share Posted March 14 25 minutes ago, CJ Atari said: Thanks reifsnyderb. Def adding jumpers for CV and will check the solder joints. JP6 is optional. It brings the circuit a lot closer to the 800. But the color burst signal is rather strong. JP7 is mandatory for composite video. 2 1 Quote Link to comment Share on other sites More sharing options...
CJ Atari Posted March 14 Share Posted March 14 Thanks - and I'll get it sorted and will go quiet on this. Thanks all for the help and thanks for keeping the Atari 8-bits going. 1 Quote Link to comment Share on other sites More sharing options...
invisible kid Posted March 14 Share Posted March 14 Keep us updated if you can! Quote Link to comment Share on other sites More sharing options...
olix Posted March 17 Share Posted March 17 Can I use a 74HCT14 instead of a 74AHCT with IC U19? What is the difference? Quote Link to comment Share on other sites More sharing options...
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