Yannil Posted April 30, 2023 Share Posted April 30, 2023 Hi, Are there any known issues running a SIDE3 cartridge on a U1MB modified Atari 800XLF? I bought a SIDE3 cartridge which arrived yesterday. But it doesn’t work right. The Loader doesn’t load sometimes and when it does it’s frozen or or flickers or is garbled. Sometimes it reads the SD card, mostly it doesn’t. The U1MB runs OK Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted April 30, 2023 Share Posted April 30, 2023 There shouldnt be an issue with an 800XLF. A few things to check. Do you you have the latest flash jazz cat firmware or are you running with the really old candle firmware? If you do have a flash jazz cat firmware the next thing to check is that you have flashed the correct u1mb plug in for side3. If you have got the right plug in for a flash jazz cat firmware, the there are two other things you can do. 1) replace the 74ls08 chip with a 74f08 chip 2) add a 100pf ceramic capacitor to the back of the U1MB. The last two are something you may or may not need. If you like take an image and upload it here of the u1mb bios. 1 Quote Link to comment Share on other sites More sharing options...
Peri Noid Posted April 30, 2023 Share Posted April 30, 2023 One more voodoo hack - if you have a "Mexico"-labelled CPU, consider replacing it with a different model. NCR for instance. Or any other. 1 Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted April 30, 2023 Share Posted April 30, 2023 Firmware won't cause this, so focus on the suggested hardware fixes. Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted May 1, 2023 Share Posted May 1, 2023 Freddie stability mod? XLF doesn’t have a filter cap due to routing error. 1 Quote Link to comment Share on other sites More sharing options...
as... Posted May 1, 2023 Share Posted May 1, 2023 In my almost std. 130xe (analog) I have no problems 1 Quote Link to comment Share on other sites More sharing options...
as... Posted May 1, 2023 Share Posted May 1, 2023 Joke with 800xl Quote Link to comment Share on other sites More sharing options...
tuf Posted May 1, 2023 Share Posted May 1, 2023 7 hours ago, Yannil said: Hi, Are there any known issues running a SIDE3 cartridge on a U1MB modified Atari 800XLF? I bought a SIDE3 cartridge which arrived yesterday. But it doesn’t work right. The Loader doesn’t load sometimes and when it does it’s frozen or or flickers or is garbled. Sometimes it reads the SD card, mostly it doesn’t. The U1MB runs OK Beyond the advice mentioned already, you may also want to check where you've got PHI2 connected for the U1MB. I had a similar problem that was solved (somewhat) by moving it from Sally (the CPU) to ANTIC. Also do you have anything connected to the PBI bus? My problems were mostly caused by having an MIO plugged in. Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted May 1, 2023 Share Posted May 1, 2023 (edited) 2 hours ago, tuf said: Beyond the advice mentioned already, you may also want to check where you've got PHI2 connected for the U1MB. I had a similar problem that was solved (somewhat) by moving it from Sally (the CPU) to ANTIC. Also do you have anything connected to the PBI bus? My problems were mostly caused by having an MIO plugged in. I don't think it's this as U1MB is working so PHI2 must be connected. My money is now on swapping out the 74ls08 with 74f08. @Yannil still pop over those bios screenshot anyway as it's good to know what you are running and let us know if you have the s3 pluggin installed if you are running FJC's firmware. Edited May 1, 2023 by Beeblebrox Quote Link to comment Share on other sites More sharing options...
tuf Posted May 1, 2023 Share Posted May 1, 2023 18 minutes ago, Beeblebrox said: I don't think it's this as U1MB is working so PHI2 must be connected. My money is now on swapping out the 74ls08 with 74f08. I'm sure it's connected now, but PHI2 reliability can be effected by where you're sourcing it from on the 800XL. Lotharek suggested I try it and it resolved my issue, which is similar to the OPs. Worth a shot! Quote Link to comment Share on other sites More sharing options...
Yannil Posted May 1, 2023 Author Share Posted May 1, 2023 11 hours ago, Beeblebrox said: There shouldnt be an issue with an 800XLF. A few things to check. Do you you have the latest flash jazz cat firmware or are you running with the really old candle firmware? If you do have a flash jazz cat firmware the next thing to check is that you have flashed the correct u1mb plug in for side3. If you have got the right plug in for a flash jazz cat firmware, the there are two other things you can do. 1) replace the 74ls08 chip with a 74f08 chip 2) add a 100pf ceramic capacitor to the back of the U1MB. The last two are something you may or may not need. If you like take an image and upload it here of the u1mb bios. I have checked and I think they both have the latest firmware Quote Link to comment Share on other sites More sharing options...
Yannil Posted May 1, 2023 Author Share Posted May 1, 2023 I checked the SIDE3 cartridge on my old Atari 800XL and it loaded OK. Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted May 1, 2023 Share Posted May 1, 2023 (edited) 16 minutes ago, Yannil said: I have checked and I think they both have the latest firmware Wrong SIDE3 Firmware, don't think yours will work without this version U1M version is correct Edited May 1, 2023 by TGB1718 Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted May 1, 2023 Share Posted May 1, 2023 @Yannil yes, you need to update your side3. I assume you have bought an old side3 as that is a much older loader firmware it's running. Fjc has since provided a much revised new firmware loader for it in January. Flash that on your side 3 and see how you go. See here : https://atari8.co.uk/firmware/side3/ Quote Link to comment Share on other sites More sharing options...
Yannil Posted May 1, 2023 Author Share Posted May 1, 2023 Well actually, it’s a new one I just bought from Retro Lemon last week. Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted May 1, 2023 Share Posted May 1, 2023 (edited) 11 minutes ago, Yannil said: Well actually, it’s a new one I just bought from Retro Lemon last week. It has the old loader firmware for whatever resson. So flash the new one and see how you go. Edited May 1, 2023 by Beeblebrox Quote Link to comment Share on other sites More sharing options...
magnusfalkirk Posted May 1, 2023 Share Posted May 1, 2023 You still need to flash the firmware with the latest version which id 0.69 Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted May 1, 2023 Share Posted May 1, 2023 Careful. Updating from the old loader to the new one might make things worse if the system isn't already working stably with the old one. Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted May 1, 2023 Share Posted May 1, 2023 @flashjazzcat couldn't he use his old 800XL to flash the SIDE3 ? would be safer to do it that way 2 hours ago, Yannil said: I checked the SIDE3 cartridge on my old Atari 800XL and it loaded OK. 1 Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted May 1, 2023 Share Posted May 1, 2023 7 minutes ago, TGB1718 said: couldn't he use his old 800XL to flash the SIDE3 ? would be safer to do it that way Absolutely. I didn't mean to imply that updating would affect the functionality of the cartridge per se; just that it might make matters worse on the problem machine. Quote Link to comment Share on other sites More sharing options...
TZJB Posted May 1, 2023 Share Posted May 1, 2023 (edited) 14 hours ago, kheller2 said: Freddie stability mod? XLF doesn’t have a filter cap due to routing error. I agree. Without the extra decoupling capacitor Freddie can cause major problems. It took TF_HH ages to find this problem and is simple to fix. I can't find the article but I did it below during a repair. Edited May 1, 2023 by TZJB Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted May 1, 2023 Share Posted May 1, 2023 (edited) There's a link to the thread in the description of this video: https://forums.atariage.com/topic/185028-found-an-issue-on-instability-effects-on-a-800-xl-with-freddie/ Edited May 1, 2023 by flashjazzcat 1 Quote Link to comment Share on other sites More sharing options...
Yannil Posted May 1, 2023 Author Share Posted May 1, 2023 I flashed the new firmware to the SIDE3 cart. I think successfully Quote Link to comment Share on other sites More sharing options...
Yannil Posted May 1, 2023 Author Share Posted May 1, 2023 (edited) Works great on my old Atari 800XL but a not on the U1MB - just gets a grey screen. now I know for a fact that a SIDE3 cartridge does run on this machine. it’s mine that doesn’t. Swapped power supplies and I got it partially working on the U1MB machine. This one is 5V 2A output. The first one is an apple phone charger plug and I cannot read the output values apart from 5V. Could it just need more power to run all the upgrades together Edited May 1, 2023 by Yannil Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted May 1, 2023 Share Posted May 1, 2023 Ah so an apple phone charger doesn't have enough amps to power it all. It is something like 1amp which won't work. I'd use at least a. 5v 2 amp Usb adapter plug or the original Atari power supply. Quote Link to comment Share on other sites More sharing options...
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