I would love to be wrong and we can delete this topic.
I am not a hardware designer or programmer, I just read through information and test.
MiST PCB revisions and/or component changes (SDRAM chips) seem to be causing issues, and I don't want it to get worse.
My main reasons for purchasing a MiST was the Archimedes & Sam Coupe Core, but I am seeing a problem.
Currently to my knowledge there are 3 cores that don't work with 'every' MiST:Archimedes - last release archimedes_150416_r1028.rbf https://github.com/mist-devel/mist-binaries/tree/master/cores/archimedes
MSX - currently being discussed in the forum
Sam Coupe - last release - SamCoupe_20170206.rbf https://github.com/sorgelig/SAMCoupe_MIST/tree/master/releases
(we will leave 15Hz/RGB/VGA issues for somewhere else, this is about booting and running the Core)
Now, is the issue SDcard size/speed (Class10 etc) or what particular SDRAM chip is mounted on the PCB? Does the Core rely on tight timings which can be different between PCB/SDRAM revisions?
Can we (sorry I mean the clever guys
) determine the issue and potentially create a solution or a design/programming 'best practice' guide to ensure future cores do not have compatibility issues.
We all love new Cores appearing and it must be fun to see them working, but slowing down a bit an ensuring that a released (I know they are always in Beta) Core is bulletproof and works with all MiST PCB revisions (I personally think) is important for the community.
If there are UK/Euro developers that have say 2 v1.3 boards, I am willing to do a swap for a v1.2 MiST so they have both revisions to test/develop on.
If the issues above cannot be resolved, then do we have a split on GitHub. Cores for v1.2 & Cores for v1.3 etc? I for one don't like seeing the carrot I cannot eat
I bought my MiST recently and received a v1.2 PCB. Telling a reseller "I only want a v1.3 (etc) or I will send it back" is not an option. You have what you are given.
I know I am a nobody (and even worse I can't program!) but I like many other people invested quite a reasonable amount of money into this amazing piece of hardware.
It is in everyone's interest to have the hard work of created Cores available to the widest audience. Creator's work and effort can be appreciated and people buying MiST won't be in a lottery of 'will it, won't it work'.
I hope I have not upset anyone and I know this is a hobbyist project. I just like to resolve issues or get them discussed (good improvements were made to the BBC Micro Core by discussion and getting knowledgable people together).
Thanks for spending the time reading this.
With problematic Cores can we have a list or some sort of POLL? The important information is:
* PCB revision
* SDcard size & speed,
* MircoSD+Adaptor or full-size SDCard (I think the adaptors are just 'dumb' no chips etc inside, so should make no difference)
* Are you running just the 1 Core on the SDcard or are you running multiple using the MENU Core.
* If Core uses additional files / ROMS, please link/attach working verison.