42 строки
1.7 KiB
Plaintext
42 строки
1.7 KiB
Plaintext
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/
|
|
|