Specifications

D:\D\inter61a\INTERRUP.A Saturday, January 08, 2011 11:31 AM
4Ch 32 BYTEs vendor chip/hardware description
6Ch BYTE installed board number (0 for 1st/only board)
6Dh 3 BYTEs unused data (0)
70h 24 BYTEs text name of the mixer channel
88h DWORD features bits (see #00123)
8Ch WORD minimum volume setting
8Eh WORD maximum volume setting
90h WORD attenuation/gain crossover
SeeAlso: #00112,#00124
Bitfields for Volume feature bits:
Bit(s) Description (Table 00123)
0 Stereo Volume control available
2 Low Pass Filter is available
3 High Pass Filter is available
4 Parametric Tone Control is available
5 selectable output paths
8 Azimuth Field positioning supported
9 Phi Field positioning supported
10-30 unused???
31 Master Volume device
Format of Volume Services Structure:
Offset Size Description (Table 00124)
00h 4 BYTEs name of the structure ("VOLS")
04h DWORD structure length (00000038h)
08h 16 BYTEs 16 bytes for future expansion (0)
---entry points (details???)---
18h DWORD device check
0011h filter range
0012h filter setting
0013h filter current
0014h tone range
0015h tone setting
0016h tone current
0017h path
0018h get IO address
0080h-.. vendors can add DevChks above 0x80
1Ch DWORD set vol to an absolute setting
01h User master volume setting
02h application master volume setting
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