By Hamsta Gangsta
Tue Sep 18, 2018 12:38 pm
Hi fam,
Sorry, but it will be a bit long...
Just yesterday I've installed JJOS-XL 3.57 on my 2500 to test it out and - to my horror - I got "Flash ROM write error" message.
It always shows up when I boot the MPC with [ERASE] + [Power] pressed and sometimes when I access different modes, for example REC: [Mode] + [PAD 4]. Error is shown for a short while and disappears. If it's going to stay like that it's not THAT much of a problem, but now I'm afraid to buy JJOS-XL in case it gets worse. This only applies to JJOS-XL, no problems whatsoever with AkaiOS/Free JJOS.
There are some threads about this issue on the forums but no one ever really followed up on how the things ended up - it would be great if by any chance someone who had this issue in the past could elaborate on the topic?
My questions/concerns about the problem:
1. Why this error shows ONLY on JJOS-XL and not on AkaiOS/Free JJOS?
It makes me think there may be some bug in JJOS-XL for 2500 (as it doesn't seem to be reported by 1000 users). I mean if the Flash ROM is faulty (as JJOS-XL suggests) why there are no problems on AkaiOS/Free JJOS?
2. Does anyone knows is it possible to just replace the Flash ROM chip on the motherboard PCB (de-solder the old one and solder a new chip)?
Manual on p. 114 states that: "The global settings found in the MPC2500 (listed below) are saved to the internal Flash Memory and stored when the MPC2500 is turned off. You can re-initialize the Factory Preset settings using the following procedure: 01. Turn the MPC2500 on while holding the [ERASE] key (...)"
So it seems that BIOS/OS are in some other chip so it should be possible to solder a new flash ROM if it "just" stores global settings and not OS, but on the other hand it should probably be pre-programmed with factory presets.
I will do some more testing today after work and post the results in the evening/tomorrow.
If you have any advice I'm all ears!
Cheers.
Sorry, but it will be a bit long...
Just yesterday I've installed JJOS-XL 3.57 on my 2500 to test it out and - to my horror - I got "Flash ROM write error" message.
It always shows up when I boot the MPC with [ERASE] + [Power] pressed and sometimes when I access different modes, for example REC: [Mode] + [PAD 4]. Error is shown for a short while and disappears. If it's going to stay like that it's not THAT much of a problem, but now I'm afraid to buy JJOS-XL in case it gets worse. This only applies to JJOS-XL, no problems whatsoever with AkaiOS/Free JJOS.
There are some threads about this issue on the forums but no one ever really followed up on how the things ended up - it would be great if by any chance someone who had this issue in the past could elaborate on the topic?
My questions/concerns about the problem:
1. Why this error shows ONLY on JJOS-XL and not on AkaiOS/Free JJOS?
It makes me think there may be some bug in JJOS-XL for 2500 (as it doesn't seem to be reported by 1000 users). I mean if the Flash ROM is faulty (as JJOS-XL suggests) why there are no problems on AkaiOS/Free JJOS?
2. Does anyone knows is it possible to just replace the Flash ROM chip on the motherboard PCB (de-solder the old one and solder a new chip)?
Manual on p. 114 states that: "The global settings found in the MPC2500 (listed below) are saved to the internal Flash Memory and stored when the MPC2500 is turned off. You can re-initialize the Factory Preset settings using the following procedure: 01. Turn the MPC2500 on while holding the [ERASE] key (...)"
So it seems that BIOS/OS are in some other chip so it should be possible to solder a new flash ROM if it "just" stores global settings and not OS, but on the other hand it should probably be pre-programmed with factory presets.
I will do some more testing today after work and post the results in the evening/tomorrow.
If you have any advice I'm all ears!
Cheers.