1The PSS cards and other ECHO based cards provide an onboard DSP with 2downloadable programs and also has an AD1848 "Microsoft Sound System" 3device. The PSS driver enables MSS and MPU401 modes of the card. SB 4is not enabled since it doesn't work concurrently with MSS. 5 6If you build this driver as a module then the driver takes the following 7parameters 8 9pss_io. The I/O base the PSS card is configured at (normally 0x220 10 or 0x240) 11 12mss_io The base address of the Microsoft Sound System interface. 13 This is normally 0x530, but may be 0x604 or other addresses. 14 15mss_irq The interrupt assigned to the Microsoft Sound System 16 emulation. IRQ's 3,5,7,9,10,11 and 12 are available. If you 17 get IRQ errors be sure to check the interrupt is set to 18 "ISA/Legacy" in the BIOS on modern machines. 19 20mss_dma The DMA channel used by the Microsoft Sound System. 21 This can be 0, 1, or 3. DMA 0 is not available on older 22 machines and will cause a crash on them. 23 24mpu_io The MPU emulation base address. This sets the base of the 25 synthesizer. It is typically 0x330 but can be altered. 26 27mpu_irq The interrupt to use for the synthesizer. It must differ 28 from the IRQ used by the Microsoft Sound System port. 29 30 31The mpu_io/mpu_irq fields are optional. If they are not specified the 32synthesizer parts are not configured. 33 34When the module is loaded it looks for a file called 35/etc/sound/pss_synth. This is the firmware file from the DOS install disks. 36This fil holds a general MIDI emulation. The file expected is called 37genmidi.ld on newer DOS driver install disks and synth.ld on older ones. 38 39You can also load alternative DSP algorithms into the card if you wish. One 40alternative driver can be found at http://www.mpg123.de/ 41 42