Sensoray 512 DOS Manual de usuario descargar pdf (Pagina 18)

6.3 X12_SENDCOMMAND function call

The X12_SENDCOMMAND function is used to send a command to the 512 driver. See section 6.3 for

command details.

Entry:

SI Function number X12_SENDCOMMAND + either CARD0 for the first card

or CARD1 for the second card.

AX Command X12_VI_START

X12_VI_STOP

X12_VI_GETDMADATA

X12_VI_PUTDMADATA

X12_VI_SETINPUT

X12_VI_SETINPUTTYPE

X12_VI_GETSTATUS

X12_RESETDEVICE

Exit:

AX Timeout flag Non-zero is timeout

Zero is success

Example:

#include “x12.h” //Included for 512 dos driver support

#include “dos.h” //Included for software interrupt support

X12PARAM _far *Param; //Declare a pointer to an X12PARAM object

union REGS regs; //

regs.x.si = X12_GETCMDPARAPTR + CARD0; //Select the driver function

int86(X12INT,&regs,&regs); //Call the driver

Param = (X12PARAM _far *) MK_FP(regs.x.dx, regs.x.ax); //Make a pointer from the returned register values

Param->Mode = ENCODE;

regs.x.ax = X12_VI_START; //The video start command

regs.x.si = X12_SENDCOMMAND + CARD0; //Select the driver function

int86(X12INT,&regs,&regs); //Call the driver

if(regs.x.ax)

{

printf("Error Timeout\n");

return 0;

}

IMPORTANT: Every time the X12_SENDCOMMAND is called any changes to the X12PARAM

members DO0, DO1, DO2 or DDIR0, DDIR1, DDIR2 take effect. Upon return VQSize, DI0, DI1, DI2,

DroppedFrames, FrameCount, and Status are updated.

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Sensoray 512 DOS Manual de usuario Pagina 18