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