Synth Site: Roland: MC-300: User reviews Add review
Average rating: 3.5 out of 5
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Garry Craig a hobbyist user from England writes:
Hi, Cracked it!! All you need to create system disks (including the software to mount the disk to a floppy) is located here:

Good luck. Regards Garry

Rating: 3 out of 5 posted Monday-Jun-06-2005 at 16:30
alain Roose a part-time user from belgium writes:
i've been using a roland mc300 for several years now ( since 1989 ).Still works fine, never had any problems.You must have the super mrc pro software ( = 8 channels instead of 4 )The only thing that's annoying; the mc300 can't read midi files; you have to convert them into mrc ( i use MRM-software,free from Roland )

Rating: 3 out of 5 posted Friday-May-30-2003 at 12:06
ohmboy a hobbyist user from USA writes:
Greetings, I'm thinking about purchasing an MC-300 but when I saw that the ebay auction I was bidding on didn't include a system disc I became concerned. I happened appon this site and it appears there's quite a bit of confusion. I seem to have figured it out though.

To make a system disk you must download the image file from rolands site, the url is here:

I found that url from rolands support site here:

If that doesn't work try downloading it off my web server, where I put a copy:

Next you need to write this image to the disk. this is different than just copying the file on the disk by clicking and draging it over to the floppy in windows. You must use a special program that will copy the image, bit by bit, directly to the disk with no filesystem. One such program for windows is called "rawrite". it is available here:

This information is only my educated assumption. I do not have an MC-300 and I am not positive it will work. I hope it does though.

good luck


posted Sunday-Apr-27-2003 at 18:39
Gerald "Gez" Irwin a part-time user from New Zealand, Australia writes:
Been using MC300 since 1985 and has not failed yet, still performing flawlessly. I have it connected to my MIDI studio/system via an Akai ME30PII Midi Patchbay. I use a Roland D-50 as the master keyboard, and a home-made PC is also connected using Musicator V2 software for score printing. So far the system has been faultless since the 1980s when I assembled/built it! I have been able to modify the system files to put a NAME on the system disks when it loads. Its a simple task using a text editor.

Rating: 5 out of 5 posted Monday-Sep-02-2002 at 21:47
Mr. HU a hobbyist user from germany writes:
Hi, is a general info for the MC-300 system disks. if you have downloaded "mc30050.out" or other operating system files (e.g. S-MRC v2.0), you have to copy this file to a 720k Disk by using a old unix tool called "dd". this tool is also available for windows(cygnus). the command to copy these file is: "dd if=c:\temp\mc30050.out of=a:" (windows like) "dd if=/tmp/mc30050.out of=/dev/fd0" (unix like)

mfg Mr.Hu

hint: ... sometimes you will find *.dat files in the net, at first you have to delete the first ten bytes of these files by a hex-editor ;)

posted Monday-Jul-22-2002 at 06:14
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