Arbor Technology EmModule-621E, Manual

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Appendix
C language Code
/*----- Include Header Area -----*/
#include "math.h"
#include "stdio.h"
#include "dos.h"
/*----- routing, sub-routing -----*/
void main()
{
outportb(0x2e, 0x87); /* initial IO port twice */
outportb(0x2e, 0x87);
outportb(0x2e, 0x2B); /* select CR2B */
outportb(0x2e+1, 0x00); /* update CR2B bit4 to 00h */
/* Set PIN89 as WDTO */
outportb(0x2e, 0x07); /* point to logical device selector */
outportb(0x2e+1, 0x08); /* select logical device 8 */
outportb(0x2e, 0x30); /* select CR30 */
outportb(0x2e+1, 0x01); /* update CR30 to 01h */
outportb(0x2e, 0xf0); /* select CRF0 */
outportb(0x2e+1, 0x00); /* update CRF0 to 00h */
outportb(0x2e, 0xf); /* select CRF to set timer unit */
outportb(0x2e+1, 0x00); /* update CRF bit2, 0:sec; 1:Min. */
outportb(0x2e, 0xF6); /* select CRF6 */
outportb(0x2e+1, 0x0); /* update CRF6 to 0h ( sec) */
outportb(0x2e, 0xAA); /* stop program W83627HF, Exit */
}