I just looked back, here is the link. This guys board looks just like mine, except I have more ram fitted
http://www.mvcsys.de/doc/remem_install.html On 26 May 2015 at 12:52, James Zeun <[email protected]> wrote: > Hi Steve > > Under other circumstances, say if we lived in the same country, I would > post you the machine and the REX to you, no questions asked. But given the > distance and the age of the M100, I dont think it would be good for the > computer or my nerves. As I would be having kittens, wondering if it was > going to get lost in the post. Plus there is the matter of shipping, I can > see posting the M100 would be expensive. > > This is a totally new platform to me, while I know what a binary is, I've > not really encountered HEX files before. Aside from HEX archives on the > Macintosh Plus. My understanding of ROMs and checksums is not shall we say > that good, in fact it's down right rubbish! The closest I've come to > playing with ROMS is on a BBC Micro computer and even then i was only > fitting them. So I think it is fair to say your knowledge on this subject > surpassed mine in leaps and bounds. Which is probably why your building the > REX and I'm not :-P > > I am very happy to post you the REX, as I would like to know what the heck > is going on myself. Is my machine faulty? is the REX faulty? Are all > European M100's built like mine? Could the REX not working in my machine, > be an indication of an inherit incompatibility between US and EU models? Am > I going to struggle with other expansion modules? > One way or the other its all a process of learning more about these little > machines. I've done a little research on EU M100's and found another guy > here in the UK who has a machine like mine. I think I sent you a link / > picture of it a while back. So we at least know mine isn't a one off. The > guy in question was trying to fit something to his machine but discovered > his mobo didn't match up with the US machines. > > The REX is installed like it is shown in the wiki page, with the two lines > on the PCB lining up with the gaps in the plastic surround. I wont deny > getting stung with the extra charges really wasn't great, since then it's > sort of felt like everything that could go wrong HAS. It's been a struggle > to keep up my enthusiasm but I do like using this little computer, it's > leagues better then the Amstrad NC100 and other machines of that ilk. > > If you want to email me your address, I will sort out sending you the REX, > is there any point me posting you the new ROM as well? > > Cheers > James > > > On 26 May 2015 at 12:00, Stephen Adolph <[email protected]> wrote: > >> James, >> Sorry, I thought you would understand that the 32k file is a binary file, >> and the file you extracted from your now modified laptop would be hex ascii. >> And yes, the goal is for you to be able to verify that you got what you >> asked for, and that involves confirming that your installed ROM matches the >> binary that I sent. Does that clarify? >> There are lots of things online to help you out. >> I used winhex to convert your file from hex ascii to binary, then compute >> the hash 16. Your extracted ROM has a checksum of A8AF - as expected. >> >> So, as I said in the off list thread, I can't do anything further. You >> have hardware that I have never seen, which could be defective for all I >> know. It also could be a broken REX. >> >> If you want you can send REX to me on your dime and I can test it out. >> If it is "no fault found" then I suppose you would want a refund which I am >> fine with but you will need to contact Ken and understand what he is >> willing to do. >> >> I am assuming that REX is correctly installed. Did you check that? >> Please go to to the wiki to understand how to install REX. >> >> If you'd rather avoid shipping costs I'm happy to refund my portion of >> this now. >> >> In the past I have had people send me their machines to debug, which >> generally is a learning opportunity. But since you are in the UK and >> already unhappy about the money you have spent, I'm not interested in >> pursuing this option as there are no guarantees that anything can be made >> to work for you. >> >> If I had more of these different UK machine data points, I would be >> comfortable with saying that REX does NOT WORK in a UK machine. But, with >> a data point of ONE unit, I don't think it is correct to make that >> statement. >> >> >> >> ..Steve >> >> >> >> >> On Tue, May 26, 2015 at 5:32 AM, James Zeun <[email protected]> wrote: >> >>> Hey guys! >>> >>> So since posting in April that I was having trouble getting REX to work, >>> there's been a little progress, but not a lot. Stephen kindly supplied me >>> with a ROM file that was compatible with the REX and using a company Kurt >>> had told me about. I had a new System ROM burnt for my machine. >>> >>> The ROM arrived last week and after installing it, the REX still doesn't >>> respond to the CALL63012 command. When I input that command, the machine >>> locks up and only by pressing the RESET can I get it back. This also has >>> the side effect of wiping clean the computers memory, which I thought was >>> interesting, because pressing the RESET shouldn't do that. Only a hard >>> reset zaps your ram (unless I'm mistaken?). >>> >>> Stephen asked me if i could do a system dump and compare results with (I >>> believe) the original file he sent me. However I'm not entirely clear on >>> the method he wants me to use, e.g Am I comparing the file sizes of each >>> file or something more involved like comparing the contents? The latter of >>> which I wouldn't have a clue about. The system dump I made over the weekend >>> curiously comes to 64kb, while the image file Stephen sent me weights in at >>> 32kb. I'm a little confused why the dumped file is twice the size, surely >>> it should be the same size as the file Stephen sent me. >>> >>> File size aside, everything else about the ROM seems to work, except I'm >>> still having issue with the REX. So either the fault is with the module or >>> my M100, or there is something else about the EU M100 that makes it >>> incompatible with REX. As its been established the motherboard and the >>> system rom of my machine differ from US machines. The only part of that >>> which bothers me, is compatibility. It just seems like bad business sense >>> to make US and EU machines so radically different. that they can't share >>> addon modules. >>> >>> Well thats the slog so far, big thanks to those people who have helped >>> me on this. It sucks big time that it didn't worked out the box, but at >>> least we know that EU M100's are funny buggers...well mine is at least! lol >>> >>> <http://www.buyicnow.com/it.php?i=72> >>> >> >> > > > -- > My retro tech blog and general ramblings > http://bytemyvdu.wordpress.com/ > -- My retro tech blog and general ramblings http://bytemyvdu.wordpress.com/
