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isabeep(4) [netbsd man page]

PCPPI(4)						   BSD Kernel Interfaces Manual 						  PCPPI(4)

pcppi -- PC (ISA) control port driver SYNOPSIS
pcppi* at acpi? pcppi* at isa? isabeep* at pcppi? (alpha only) sysbeep* at pcppi? (i386 only) spkr0 at pcppi? midi* at pcppi? DESCRIPTION
The pcppi driver handles resource allocation and device attachment for the ports related to the ISA speaker in the traditional PC/AT ``design''. These are the ``system control port'' (which was implemented by the 8255 ``PPI'' in the XT, hence the name of this driver) at IO address 0x61. When associated with an attimer(4) device, it is possible to change the pitch of the sounds emitted through pcppi. The pcppi driver provides its child devices with the ability to output simple tones through the PC speaker. The speaker(4) and midi(4) devices use this to synthesize sounds. The isabeep(4) and sysbeep(4) devices are helpers which the pckbd(4) driver uses as a substitute for a ``keyboard beep'', because the PC keyboard hardware doesn't provide this. SEE ALSO
acpi(4), attimer(4), isa(4), midi(4), pckbd(4), speaker(4) BSD
March 22, 2005 BSD

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OPL(4)							   BSD Kernel Interfaces Manual 						    OPL(4)

opl -- Yamaha OPL2 and OPL3 FM MIDI synthesizer driver SYNOPSIS
opl* at cmpci? flags 1 opl* at eso? opl* at ess? opl* at fms? opl0 at isa? port 0x388 opl* at sb? opl* at sv? opl* at wss? opl* at yds? opl* at ym? midi* at opl? DESCRIPTION
The opl driver provides support for the Yamaha OPL2 (YM3812) and OPL3 (YMF262) chips. The chips are FM synthesizers and are capable of pro- ducing a wide range of sounds. Access to the device is through the MIDI driver. The opl driver usually attaches to a sound card, but it can also sit directly on the ISA bus. If ``flags 1'' is specified, the opl driver handles left and right channels of OPL3 swapped. Use this flag if your device has such problem. SEE ALSO
cmpci(4), eso(4), ess(4), fms(4), isa(4), midi(4), sb(4), sv(4), wss(4), yds(4), ym(4) HISTORY
The opl device driver appeared in NetBSD 1.4. BUGS
The OPL3 chip is operated in OPL2 mode despite being more capable. BSD
January 3, 2009 BSD
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