Lavalamp Posted August 25, 2017 Share Posted August 25, 2017 Hi, I have recent purchased a 800XL (PAL) and paired it with a SIO2SD external drive, all appears to work fine, expect on a lot of games I'm getting a corrupted sprite, and I'm not sure why, would anyone be able to shed light on what may be causing this? Configuration, software, PAL/NTSC issue, RAM or Antic failure? Note that some games appear to run perfectly. Also passes memory tests fine. I apologize for the poor photos, but you can see the corrupted missile or sprite running vertically down the display, these will follow the player or enemies. Any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted August 25, 2017 Share Posted August 25, 2017 Guess is bad GTIA based on similar past issues with other machines but hard to be sure without further info. How does it handle something like Joust in the later levels with lots of enemies floating around on-screen at once? 2 Quote Link to comment Share on other sites More sharing options...
Grover Torbel Posted August 25, 2017 Share Posted August 25, 2017 This is almost identical to a problem I was having. Replacing the GTIA fixed everything. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Lavalamp Posted August 25, 2017 Author Share Posted August 25, 2017 (edited) Guess is bad GTIA based on similar past issues with other machines but hard to be sure without further info. How does it handle something like Joust in the later levels with lots of enemies floating around on-screen at once? Joust fails immediately with one following the main player, it was one of the first I tried. This also appears straight away with Zaxxon, Gyrus, Attack of the Mutant Camels, Poll Position . However Loadrunner, Hero, Defender, Gallaxian, Starquake, Rampage, ChopperLifter, Dandy all run fine. Edited August 25, 2017 by Lavalamp Quote Link to comment Share on other sites More sharing options...
Lavalamp Posted August 25, 2017 Author Share Posted August 25, 2017 This is almost identical to a problem I was having. Replacing the GTIA fixed everything. Sent from my iPhone using Tapatalk Thanks, I am beginning to think the GTIA is the issue. Quote Link to comment Share on other sites More sharing options...
Grover Torbel Posted August 25, 2017 Share Posted August 25, 2017 Thanks, I am beginning to think the GTIA is the issue. The nice thing if it is the GTIA, is that it's a simple, inexpensive fix. GTIA should only be about $5+shipping, although minimum order from Best Electronics is $20. Quote Link to comment Share on other sites More sharing options...
Lavalamp Posted August 26, 2017 Author Share Posted August 26, 2017 (edited) Guess is bad GTIA based on similar past issues with other machines but hard to be sure without further info. How does it handle something like Joust in the later levels with lots of enemies floating around on-screen at once? Heres a clearer photo of the issue, the issue starts after a number of sprites appear. Edited August 26, 2017 by Lavalamp Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted August 26, 2017 Share Posted August 26, 2017 Looks very much like a GTIA issue. If you have a spare system, do a swap and see how it goes? Otherwise you'll need to track down a spare Best Electronics still sells them. Quote Link to comment Share on other sites More sharing options...
Lavalamp Posted August 27, 2017 Author Share Posted August 27, 2017 Looks very much like a GTIA issue. If you have a spare system, do a swap and see how it goes? Otherwise you'll need to track down a spare Best Electronics still sells them. Thanks I have a second 800XL for parts coming, hopefully this is a socketed GTIA too, or if its working might just swap out the entire motherboard. Quote Link to comment Share on other sites More sharing options...
Paul Westphal Posted August 28, 2017 Share Posted August 28, 2017 All Hong Kong 800XL's are socketed, as are all HK 600XL's. 1 Quote Link to comment Share on other sites More sharing options...
Stormtrooper of Death Posted August 28, 2017 Share Posted August 28, 2017 Thats good to know. Because I have 2 Hong Kong 800XLs. Quote Link to comment Share on other sites More sharing options...
Lavalamp Posted September 8, 2017 Author Share Posted September 8, 2017 Looks very much like a GTIA issue. If you have a spare system, do a swap and see how it goes? Otherwise you'll need to track down a spare Best Electronics still sells them. Thankyou! You were spot on. Replacing the GTIA fixed it. Very happy. 2 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted September 10, 2017 Share Posted September 10, 2017 Now the burning question... does the 'bad' GTIA exhibit the same problem on the other machine you swapped the good one out of? There's a chance of a bad pin contact to the socket, that just reseating would help with. Quote Link to comment Share on other sites More sharing options...
Level42 Posted September 10, 2017 Share Posted September 10, 2017 (edited) All Hong Kong 800XL's are socketed, as are all HK 600XL's. Let me correct this: All 600XL's are socketed. Edited September 10, 2017 by Level42 Quote Link to comment Share on other sites More sharing options...
Lavalamp Posted September 14, 2017 Author Share Posted September 14, 2017 (edited) Now the burning question... does the 'bad' GTIA exhibit the same problem on the other machine you swapped the good one out of? There's a chance of a bad pin contact to the socket, that just reseating would help with. I had tried re-seating it first, but no go, the donor XL was in poorer shape than I was led to believe, missing its Sally and Pokey chips, and internal shield, did not want to risk my good components in it to test, so not operational. I was lucky that the GTIA and ANTIC were still there. I fitted the faulty GTIA in the donor for now. Edited September 14, 2017 by Lavalamp Quote Link to comment Share on other sites More sharing options...
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