New OS v20 contains a lot of new mappers, improvements and fixes, this is probably biggest update for N8. Woks over new release almost complete and i decide to publish beta build for tests.changes list:beta1:1. Now save states supported by all mappers.2. New MMC5. Mapper was fully rewrited and now it can play all MMC5 games3. New FDS audio core4. Audio core for Sunsof5 mapper by Necronomfive5. Audio core for VRC7 mapper by Necronomfive6. Specific games databese update. Now works few more games which require specific settings7. Minor update from MMC38. New mappers support: 27, 50, 106, 108, 142, 144, 145, 149, 156, 165, 171, 175, 176, 183, 213, 216, 222, 252, 37, 45, 49, 51, 52, 105, 177, 197, 214, 228, 229, 244, 249, 250,9. Bug fixesbeta2:1. Fixed Death Race (AGCI) [!] (game assigned to mapper 144)2. Fixed Romancia (J) (vram bank switching enabled)3. MMC5 sound returned4. long reset function fixed5. VRC6 aufio fix (thanks to Slamy)6. FDS autoswap blocking function. Hold select to prevent disk swap (until select pressed) This mostly for test fds sound in zelda intro.7. FDS audio changes.rc1:1. Audio balance option for mappers with expansion audio2. New mappers: 35, 44, 56, 60, 103, 117, 132, 136, 143, 159, 172, 173, 183, 186, 187, 198, 199, 221, 238, 2483. Some other minor fixesrc2:1. Another FDS audio update2. Fixes for Incredible Crash Dummies3. Fixes for lost audio in mapper 264. some other minor fixes5. FDS autoswap blocking function remaped to 'A' buttonrc3:1. MMC1 repaired2. System init changes. Prevents random hangs after resetrc4/rc5:1. FDS audio changes.rc4 same as rc5, but but with minor changes in bus controller. rc4 mostly for Koh1Fds, check if something changes for your caserc6:1. 200% vol option included2. Minor changes in Acclaim MMC3 clone which seems not affect something anywayrc7:1. MMC3 fixDownload link:beta1: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-beta1.zip beta2: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-beta2.zip rc1: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-rc1.zip rc2: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-rc2.zip rc3: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-rc3.zip rc4: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-rc4.zip (recommended for users who observe white artifacts with other versions)rc5: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-rc5.zip rc6: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-rc6.zip rc7: http://krikzz.com/pub/support/var/rc/N8/nesos-v20-rc7.zip Mappers puzzle almost complete (: