为什么keil程序没错，pretues演示出错。

Question

为什么keil程序没错，pretues演示出错
#include
#define uchar unsigned char
uchar code ledtab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char sec=0,min=0,hour=12,scanled;
unsigned char key,time;
unsigned char disdat[6];
sbit K=P1^0;
void dischg()
{
disdat[0]=sec%10;
disdat[1]=sec/10;
disdat[2]=min%10;
disdat[3]=min/10;
disdat[4]=hour%10;
disdat[5]=hour/10;

}
void t0isr() interrupt 1
{
TR0=0;
TH0=0x3c;
TL0=0xb0;
TR0=1;
time++;
if(time==20)
{
time=0;
sec++;
if(sec>59)
{
sec=0;
min++;
if(min>59)
{
min=0;
hour++;
if(hour>23)
{
hour=0;
}
}
}
}
dischg();
}
void t1isr() interrupt 3
{
TH1=0xec;
TL1=0x78;
switch(scanled)
{
case 0:
P2=0x01;
P0=~ledtab[disdat[5]];
break;
case 1:
P2=0x02;
P0=~ledtab[disdat[4]]&0x7f;
break;
case 2:
P2=0x04;
P0=~ledtab[disdat[3]];
break;
case 3:
P2=0x08;
P0=~ledtab[disdat[2]]&0x7f;
break;
case 4:
P2=0x10;
P0=~ledtab[disdat[1]];
break;
case 5:
P2=0x20;
P0=~ledtab[disdat[0]];
break;
default:break;
}
scanled++;
scanled%=6;
}
void main()
{
TMOD=0x11;
TH0=0x3c;
TL0=0xb0;
TH1=0xec;
TL1=0x78;
EA=1;
TR1=1;
ET0=1;
ET1=1;
sec=0;
min=0;
hour=12;
scanled=0;
time=0;
key=0;
dischg();
while(1)
{
if(K==0)
{
while(K==0);
key++;
key%=2;
}
switch(key)
{
case 0:
TR0=1;
break;
case 1:
TR0=0;
break;

}
}
}
现在是pretues无法演示，要么是显示不了我想要的图案
我用的是第二个答案
https://zhidao.baidu.com/question/2122521327239754307.html