| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | The PSS cards and other ECHO based cards provide an onboard DSP with |
| 2 | downloadable programs and also has an AD1848 "Microsoft Sound System" |
| 3 | device. The PSS driver enables MSS and MPU401 modes of the card. SB |
| 4 | is not enabled since it doesn't work concurrently with MSS. |
| 5 | |
| 6 | If you build this driver as a module then the driver takes the following |
| 7 | parameters |
| 8 | |
| 9 | pss_io. The I/O base the PSS card is configured at (normally 0x220 |
| 10 | or 0x240) |
| 11 | |
| 12 | mss_io The base address of the Microsoft Sound System interface. |
| 13 | This is normally 0x530, but may be 0x604 or other addresses. |
| 14 | |
| 15 | mss_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 | |
| 20 | mss_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 | |
| 24 | mpu_io The MPU emulation base address. This sets the base of the |
| 25 | synthesizer. It is typically 0x330 but can be altered. |
| 26 | |
| 27 | mpu_irq The interrupt to use for the synthesizer. It must differ |
| 28 | from the IRQ used by the Microsoft Sound System port. |
| 29 | |
| 30 | |
| 31 | The mpu_io/mpu_irq fields are optional. If they are not specified the |
| 32 | synthesizer parts are not configured. |
| 33 | |
| 34 | When 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. |
| 36 | This fil holds a general MIDI emulation. The file expected is called |
| 37 | genmidi.ld on newer DOS driver install disks and synth.ld on older ones. |
| 38 | |
| 39 | You can also load alternative DSP algorithms into the card if you wish. One |
| 40 | alternative driver can be found at http://www.mpg123.de/ |
| 41 | |