This command changes the contents of the system parameter registers SPRM9 and SPRM10. SPRM9 defines the timeout duration to (branch to) play a specified PGC after the timeout expires. The new value for SPRM9 can be one of the following:

1) the value is in another GPRM register, or
2) a 16-bit constant value.

The value in SPRM9 decreases by 1 each second. When the value reaches zero, the PGC defined in SPRM10 starts playback. The countdown temporarily pauses at a system menu (title or VTS menu) or if the user pauses playback via the remote control. The countdown resumes when in the VTS title domain again, or when playback reaches a still cell (cell's still time defined as 255).

This command can be present only in the VTS title domain.

1) the value is in another GPRM register, or
2) a 16-bit constant value.

Set Navigation Timer
Timeout Duration in    GPRM0 GPRM1 GPRM2 GPRM3 GPRM4 GPRM5 GPRM6 GPRM7 GPRM8 GPRM9 GPRM10 GPRM11 GPRM12 GPRM13 GPRM14 GPRM15 At expiration, jump to PGC
DVD Command	Hex Encoding
SetNVTMR timer=GPRM0, PGCN=1	42 00 00 00 00 01 00 00

This command can be combined with the Compare GPRM operations for conditional branching. When combining, this command is executed only if the result of the comparison is true.

1) Compare to another GPRM register and SetNVTMR
2) Compare to another SPRM register and SetNVTMR
3) SetNVTMR and Link