Function 18, subfunction 8 - disable/enable the internal speaker.
If speaker sound is disabled, all calls to subfunction 55 of
function 55 are ignored. If speaker sound is enabled,
they are routed on builtin speaker.
Subsubfunction 1 - get status.
Parameters:
- eax = 18 - function number
- ebx = 8 - subfunction number
- ecx = 1 - number of the subsubfunction
Returned value:
- eax = 0 - speaker sound is enabled; 1 - disabled
Subsubfunction 2 - toggle status.
Toggles states of disable/enable.
Parameters:
- eax = 18 - function number
- ebx = 8 - subfunction number
- ecx = 2 - number of the subsubfunction
Returned value:
- function does not return value