Difference between revisions of "PATCH"

Revision as of 16:58, 9 May 2016

Sierra On-Line Interpreter Patch
Developer:	Sierra On-Line
Header:	Unknown
Content:	Instrument
Instruments:	Intrinsic
Target Output
Released:	1988-??-??
First Game:	King's Quest IV: The Perils of Rosella (DOS)
Extensions	*.*

The Sierra On-Line Interpreter Patch format was created by Sierra On-Line for their games that used their SCI engine. Patch files contain special instrument definitions that must be sent to the audio device before playing an SCI music file. If the patch isn't sent, the song will still play the correct notes, but with incorrect instruments.

All of the audio devices supported by the SCI format require a patch file except for the PC Speaker, Tandy 3 Voice, PS-1 Audio, and General MIDI. The reason these devices do not require a patch is because they cannot have customized instruments.

Patch files can contain multiple system exclusive definitions in each file. For example, the MT-32 patch has 2 definitions. The first contains the instrument definitions and is sent when the game loads, the second sets the instruments back to the factory default when the game closes.

Patch files are always named "patch" and have a numeric extension to signify which device they're for. You can see the index below.

Players

• SV - Windows

Games

All of Sierra's SCI games use the SCI Patch format.

Released	Title	Sample
King's Quest IV: The Perils of Rosella (DOS)	1988-??-??

Links