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Difference between revisions of "SCUMM/V0/Maniac Mansion Apple II"
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SCUMM/V0/Maniac Mansion Apple II (view source)
Revision as of 22:02, 12 April 2011
, 22:02, 12 April 2011Add back '$' after Thierry's Math fixes :)
(Documenting a little about the Apple II sound, including information on the speaker and the resources used.) |
m (Add back '$' after Thierry's Math fixes :)) |
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== Introduction == | == Introduction == | ||
Maniac Mansion for the Apple II produced sound effects via its internal speaker and | Maniac Mansion for the Apple II produced sound effects via its internal speaker and the only music played is Razor/Sid's piano track. | ||
It appears that not all sound effects were used in the game, this is noticeable when running the game through an emulator. | |||
However these un-used sound effects still appear in the resources. A speculative guess would be that perhaps they | It appears that not all sound effects were used in the game, this is noticeable when running the game through an emulator, of particular note is the lack of introduction audio. | ||
were disabled because | |||
However these un-used sound effects still appear in the resources. | |||
A speculative guess would be that perhaps they were disabled because the AppleII engine was unable to parse the sound resources synchronously, during playback the engine would pause and poll for keyboard input to stop the audio. | |||
== The Sound Resources == | == The Sound Resources == | ||
A sound resource appears to have the following format: | A sound resource appears to have the following format: | ||
It is worth noting that byte number 5 seems to be always 0x01, but there is a check in the code for values not equal to 0x01. The final byte is always 0xFF | |||
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
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The duration and frequency of the sound could be managed by the use of loops controlling the references to $C030. | The duration and frequency of the sound could be managed by the use of loops controlling the references to $C030. | ||