Re: RE: [xl7] Observations on ROM format
2015-07-27 by Matt
I understand that this is amazing headway, as far as helping the project, I have hardware and slight scripting knowledge, but possibly more time if someone can guide me (on unemployment and searching for a job if anyone is hiring, but in the meantime)
On Jul 26, 2015 10:11 PM, "Brian Grassfield brian.grassfield@... [xl7]" <xl7@yahoogroups.com> wrote:
o/
Coders are here. I understand this text, but I have no time to take a look on the files. :(Sent from Yahoo Mail on Android
From:"Max Sentry montyman1@... [xl7]" <xl7@yahoogroups.com>
Date:H, júl. 27, 2015 at 4:19
Subject:RE: [xl7] Observations on ROM format
I guess what we need is to find a core group that understands the type of info that is being fed the group. I'm just a user, with no code experience. Please raise your hands if you know all this tech talk?
To: xl7@yahoogroups.com; p2k@yahoogroups.com
From: xl7@yahoogroups.com
Date: Sun, 26 Jul 2015 05:26:03 +0000
Subject: [xl7] Observations on ROM format
I have had a few looks at the contents of images from the ROM SIMM - the sample image (also known as the main part, not the preset part).It seems that they have a common initial block of 0x59C bytes in size. From what I can tell only the last few bytes are different but I don't know what the differences mean - they might actually belong to the next block.Then comes a the name of the ROM image and some other stuff taking up 0x11C bytes - which seems to be a directory structure or something similar. It can have multiple components. In the VintagePro ROM there appears to be two entries ["VintagePro V.45", and "all drums v22"] And the information in them probably has offsets to where they are in the ROM.Next comes a standard E4B file stored from 0x6AE. The information preceding it probably provides some size information, but the information is a standard file so that we could probably make a ROM from any E4B image.However it may not be necessary to have them in that format unless you want to use the SIMM in an Ultra Sampler.The preset image needs more work, but I believe the samples really point to the samples in the E4B files stored in the main ROM. The presets are probably the same as sysex information (but that needs confirmation) and the riffs/demos are midi files. So it shouldn't be too hard to make ROMs from any old stuff.