Add some missing files

README.md

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+# RetroArch BIOSes
+
+## Based from [libretro-core-info](https://github.com/libretro/libretro-core-info/tree/master)
+
+## Note
+
+### To use Super Game Boy
+
+In [/system](https://github.com/Abdess/retroarch_system/tree/RetroArch/system)
+For BSNES extract "[SGB SFC for BSNES.zip](https://github.com/Abdess/retroarch_system/blob/RetroArch/system/SGB%20SFC%20for%20BSNES.zip?raw=true)" (already extracted)
+For Higan or nSide extract "[SGB SFC for Higan or nSide.zip](https://github.com/Abdess/retroarch_system/blob/RetroArch/system/SGB%20SFC%20for%20Higan%20or%20nSide.zip?raw=true)"
+
+## Missing files
+
+### SNK - Neo Geo CD (NeoCD) - *All optional*
+
+>"neocd/neocd_f.rom (Front Loader BIOS)" (sha1): a5f4a7a627b3083c979f6ebe1fabc5d2df6d083b
+>"neocd/neocd_sf.rom (Front Loader BIOS (SMKDAN))" (sha1): c99c44a43bded1bff4570b30b74975601bd3f94e
+>"neocd/neocd_st.rom (Top Loader BIOS (SMKDAN))" (sha1): d463b3a322b9674f9e227a21e43898019ce0e642
+>"neocd/neocd_sz.rom (CDZ BIOS (SMKDAN)) (sha1): 41ca1c031b844a46387be783ac862c76e65afbb3
+
+### Palm OS (Mu) - *All optional*
+
+>"palmos40-en-m500.rom (Palm OS 4.0)" (md5): f50e4d5e4d98dc831f2c34a9107651eb
+>"palmos52-en-t3.rom (Palm OS 5.2.1)" (md5): de46ec84d9aabf655eabdf9b00a3845d
+>"palmos60-en-t3.rom (Palm OS 6.0)" (md5): ?
+>"bootloader-dbvz.rom (MC68VZ328 UART Bootloader)" (md5): 9da101cd2317830649a31f8fa46debec
+
+If you have one of these missing files available, I will be happy if you send me a message to add it to the collection. :)