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1da177e4 LT |
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 |