trackball BIOS (236-bios.sp1, 236-bios_japan_hack.sp1) for irrmaze, PCB BIOS (sp-4x.sp1, spj.sp1) for ms5pcb/svcpcb/kf2k3pcb. all carry BRF_ESS flag in d_neogeo.cpp, verified against source.
add core_classification, cores, upstream fields. fix false aliases (fixnes, fsuae, gearboy, higan_sfc, higan_sfc_balanced, potator, quicknes). add new profiles (fbneo_neogeo, flycast_gles2, genesis_plus_gx_wide). remove verbose notes and disclaimers.