Juniper-systems Allegro DOS Manual Manual de usuario descargar pdf (Pagina 240)

Page 8-6 Software Developer's Guide for DOS

Allegro Get Keystroke Function (Allegro_Getch())

The following function can be used to put the Allegro to sleep while

waiting for a keystroke.

char Allegro_Getch(void)

{

while(!kbhit()) // do sleep function until key is pressed

{

_asm

{

push ax

push bx

mov ax, 2F19h

mov bl, 10000000b //load regs for sleep call

int 10h //call sleep function

pop bx

pop ax

}

return(getch());

}

Allegro CPU Busy Function (Allegro_CpuBusy)

This function overrides the Power Manager and causes the CPU to enter

a high power state. It remains in this state until the Allegro_CpuDone

function is called. It is used to temporarily speed up the CPU when data

needs to be processed rapidly.

void Allegro_CpuBusy (void)

{

_asm

{

push ax

push bx

mov ax, 2E0Bh

mov bl, 0 // setup regs for function call

int 10h // call cpu busy function

pop bx

pop ax

}

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Juniper-systems Allegro DOS Manual Manual de usuario Pagina 240