From e58c475feebdc32875811e5a47f8bc8d7943dcaf Mon Sep 17 00:00:00 2001 From: Connor McLaughlin Date: Tue, 7 Apr 2020 12:05:25 +1000 Subject: [PATCH] Update README.md with more notes about BIOS selection --- README.md | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/README.md b/README.md index 087e13426..711bd2870 100644 --- a/README.md +++ b/README.md @@ -53,6 +53,17 @@ PlayStation game discs do not contain title information. For game titles, we use This database can be manually downloaded and added as `cache/redump.dat`, or automatically downloaded by going into the `Game List Settings` in the Qt Frontend, and clicking `Update Redump Database`. +## Region detection and BIOS images +By default, DuckStation will emulate the region check present in the CD-ROM controller of the console. This means that when the region of the console does not match the disc, it will refuse to boot, giving a "Please insert PlayStation CD-ROM" message. DuckStation supports automatic detection disc regions, and if you set the console region to auto-detect as well, this should never be a problem. + +If you wish to use auto-detection, you do not need to change the BIOS path each time you switch regions. Simply place the BIOS images for the other regions in the **same directory** as the configured image. This will probably be in the `bios/` subdirectory. Then set the console region to "Auto-Detect", and everything should work fine. The console/log will tell you if you are missing the image for the disc's region. + +Some users have been confused by the "BIOS Path" option, the reason it is a path and not a directory is so that an unknown BIOS revision can be used/tested. + +Alternatively, the region checking can be disabled in the console options tab. This is the only way to play unlicensed games or homebrew which does not supply a correct region string on the disc, aside from using fastboot which skips the check entirely. + +Mismatching the disc and console regions with the check disabled is supported, but may break games if they are patching the BIOS and expecting specific content. + ## Building ### Windows