nkrypth/madlabz-os-s900-s950 ? reverse-engineered prompt

Build me a new bootable operating system image for the AKAI S900 and S950 that keeps stock compatibility but adds the extra creative features described in the README. I want it to boot from a floppy disk image, keep the same available sample RAM as the original OS, and show a clear boot banner so I can tell which version is running.

Please make the editing experience nicer too, with things like time stretch, virtual slicing, filter tracking, tempo synced LFO, filter cutoff LFO, MIDI learn, zero crossing snapping, quiet tail trimming, glide, and support for reading and writing FAT12 disks plus WAV import where it fits. For the S900, include the bigger directory and multi disk loading behavior, and for the S950 keep the SCSI and FAT variants working. If something is too tight on space, keep the core features and cleanly remove or simplify the less important stock functions. Make sure disk writes are verified, destructive actions ask for confirmation, and the whole thing stays stable on real hardware and floppy emulator setups.