#### System Parameter Registers (SPRM)

number | name | contents | allowable values | default
--- | --- | --- | --- | ---
0 |  | preferred menu language | ISO 639 code | player specific
1 | ASTN | audio stream number | 0-7, 15(none) | 15
2 | SPSTN | sub-picture stream number | bit0-bit5:0-31, 62(none), 63(forced) bit6=0 - do not display | 62
3 | AGLN | angle number | 1-9 | 1
4 | TTN | title number in volume | 1-99 | 1
5 | VTS_TTN | title number in VTS | 1-99 | 1
6 | TT_PGCN | PGC number | 1-32767 |
7 | PTTN | PTT number | 1-99 | 1
8 | HL_BTNN | highlighted button number | bit10-bit15: 1-36, bit0-bit9 = 0 | 1 (1024)
9 | NVTMR | navigation timer | 0-65535 (seconds) | 0
10 | NV_PGCN | PGC jump for nav timer | 1-32767 (PGC in current title) |
11 | AMXMD | Karaoke audio mixing mode | bit set indicate mix ch to ch bit2 2->1, bit3 3->1, bit4 4->1, bit10 2->0, bit11 3->0, bit12 4->0 | 0
12 | CC_PLT | parental management country code | ISO 3166 code | player specific
13 | PLT | parental level | 1-8, 15(none) | player specific
14 |  | video preference and current mode | bit10-bit11 preferred display aspect ratio 0=4:3, 1=not specified, 2=reserved, 3=16:9 bit8-bit9 current video mode 0=normal, 1=pan/scan, 2=letterbox, 3=reserved | player specific
15 |  | player audio capabilities | 0=cannot play bit2:SDDS karaoke, bit3:DTS karaoke, bit4:MPEG karaoke, bit6:Dolby karaoke, bit7:PCM karaoke, bit10:SDDS, bit11:DTS, bit12:MPEG, bit14:Dolby | player specific
16 |  | preferred audio language | ISO 639 code | 0xFFFF
17 |  | preferred audio language extension | 0=not specified, 1=normal, 2=for visually impaired, 3=director comments, 4=alternate director comments | 0
18 |  | preferred sub-picture language | ISO 639 code | 0xFFFF
19 |  | preferred sub-picture language extension | 0=not specified, 1=normal, 2=large, 3=children, 5=normal captions, 6=large captions, 7=childrens captions, 9=forced, 13=director comments, 14=large director comments, 15=director comments for children | 0
20 |  | player region code (mask) | bit set for each enabled region, bit0=region 1 | player specific
21 |  | reserved |  |
22 |  | reserved |  |
23 |  | reserved for extended playback mode |  |

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