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diff --git a/README.OPL b/README.OPL deleted file mode 100644 index f2aa113b..00000000 --- a/README.OPL +++ /dev/null @@ -1,109 +0,0 @@ -== Chocolate Doom hardware OPL support notes == - -Chocolate Doom is able to play MIDI music as it sounds in Vanilla Doom -with an OPL chip (as found in the Yamaha Adlib card, the Sound Blaster -and its clones). Most modern computers do not include an OPL chip any -more, as CPUs are fast enough to do decent software MIDI synthesis. -For this reason, a software OPL emulator is included as a substitute. - -However, no software emulator sounds exactly like a real (hardware) -OPL chip, so if you do have a sound card with hardware OPL, here's how -to configure Chocolate Doom to use it. - -=== Sound cards with OPL chips === - -If you have an ISA sound card, it almost certainly includes an OPL -chip. Modern computers don't have slots for ISA cards though, so you -must be running a pretty old machine. - -If you have a PCI sound card, you probably don't have an OPL chip. -However, there are some exceptions to this. The following cards are -known to include "legacy" OPL support: - - * C-Media CMI8738 (*) - * Forte Media FM801 - * Cards based on the Yamaha YMF724 (*) - -Other cards that apparently have OPL support but have not been tested: - - * S3 SonicVibes - * AZTech PCI 168 (AZT 3328 chipset) - * ESS Solo-1 sound cards (ES1938, ES1946, ES1969 chipset) - * Conexant Riptide Audio/Modem combo cards - * Cards based on the Crystal Semiconductors CS4281 - * Cards based on the Avance Logic ALS300 - * Cards based on the Avance Logic ALS4000 - -If you desperately want hardware OPL music, you may be able to find -one of these cards for sale cheap on eBay. - -For the cards listed above with (*) next to them, OPL support is -disabled by default and must be explictly enabled in software. - -If your machine is not a PC, you don't have an OPL chip, and you will -have to use the software OPL. - -=== Operating System support === - -If you're certain that you have a sound card with hardware OPL, you -may need to take extra steps to configure your operating system to -allow access to it. To do hardware OPL, Chocolate Doom must access -the chip directly, which is usually not possible in modern operating -systems unless you are running as the superuser (root/Administrator). - -=== Windows 9x === - -If you're running Windows 95, 98 or Me, there is no need to configure -anything. Windows allows direct access to the OPL chip. You can -confirm that hardware OPL is working by checking for this message in -stdout.txt: - - OPL_Init: Using driver 'Win32'. - -=== Windows NT (including 2000, XP and later) === - -If you're running an NT-based system, it is not possible to directly -access the OPL chip, even when running as Administrator. Fortunately, -it is possible to use the "ioperm.sys" driver developed for Cygwin: - - http://openwince.sourceforge.net/ioperm/ - -It is not necessary to have Cygwin installed to use this. Copy the -ioperm.sys file into the same directory as the Chocolate Doom -executable and it should be automatically loaded. - -You can confirm that hardware OPL is working by checking for this -message in stdout.txt: - - OPL_Init: Using driver 'Win32'. - -=== Linux === - -If you are using a system based on the Linux kernel, you can access -the OPL chip directly, but you must be running as root. You can -confirm that hardware OPL is working, by checking for this message on -startup: - - OPL_Init: Using driver 'Linux'. - -If you are using one of the PCI cards in the list above with a (*) -next to it, you may need to manually enable FM legacy support. Add -the following to your /etc/modprobe.conf file to do this: - - options snd-ymfpci fm_port=0x388 - options snd-cmipci fm_port=0x388 - -=== OpenBSD/NetBSD === - -You must be running as root to access the hardware OPL directly. You -can confirm that hadware OPL is working by checking for this message -on startup: - - OPL_Init: Using driver 'OpenBSD'. - -=== FreeBSD === - -There is no native OPL backend for FreeBSD yet. Sorry! - -# vim: tw=70 - |