用的是W78E58B,24M晶振。从W78E58B的AUX-RAM写到AT29C020怎么也写不对，有时前两个字节对，后面全是0。有时干脆都不对。换成从程序存储器写到AT29C020，一点问题也没有。弄了一天多，还是不知道问题出在哪儿。
程序如下，请高手帮忙分析分析是什么原因。
#include<reg_w78e58b.h>
#include<absacc.h>
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
unsigned char code sct_data[]=
{
0x00,0x08,0x00,0x01,0x75,0xc0,0x02,0xee,0x20,0x02,0xba,0x20,0x00,0x66,0x20,0x40,
0x07,0x0a,0x40,0x05,0x00,0x03,0x9e,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x08,0x00,0x01,0x75,0xc0,0x02,0xee,0x20,0x02,0xba,0x20,0x00,0x66,0x20,0x40,
0x07,0x0a,0x40,0x05,0x00,0x03,0x9e,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x08,0x00,0x01,0x75,0xc0,0x02,0xee,0x20,0x02,0xba,0x20,0x00,0x66,0x20,0x40,
0x07,0x0a,0x40,0x05,0x00,0x03,0x9e,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x08,0x00,0x01,0x75,0xc0,0x02,0xee,0x20,0x02,0xba,0x20,0x00,0x66,0x20,0x40,
0x07,0x0a,0x40,0x05,0x00,0x03,0x9e,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};
#define ce_29020 P22
#define oe_29020 P23
#define we_29020 P24
/*** load mmry data to eep ***/
void cpy_mmry_29c020(uchar data sct_num)
{
uint data tmp;
uchar data seg;
uchar data nu;
oe_29020=1;
/* A16 *, A17 在程序外设置 */
ce_29020=0;
/* load aa to 0x5555 */
P0=0;
P27=0; P27=1;
P0=0x55;_nop_();
P25=0; P25=1;
P0=0x08;_nop_();
P27=0; P27=1;
P0=0x55;_nop_();
P25=0; P25=1;
P0=0xaa;for(nu=0;nu<4;nu++) _nop_();
we_29020=0;
we_29020=1;
/* load 55 to 0x2aaa */
P0=0;
P27=0; P27=1;
P0=0xaa;_nop_();
P25=0; P25=1;
P0=0x08;_nop_();
P27=0; P27=1;
P0=0x2a;_nop_();
P25=0; P25=1;
P0=0x55;for(nu=0;nu<4;nu++) _nop_();
we_29020=0;
we_29020=1;
/* load aa to 0x5555 */
P0=0;
P27=0; P27=1;
P0=0x55;_nop_();
P25=0; P25=1;
P0=0x08;_nop_();
P27=0; P27=1;
P0=0x55;_nop_();
P25=0; P25=1;
P0=0xa0;for(nu=0;nu<4;nu++) _nop_();
we_29020=0;
we_29020=1;
// to lock mid 8 bit addr
P0=0x08;_nop_();
P27=0; P27=1;
P0=sct_num;_nop_();
P25=0; P25=1;
for(tmp=0;tmp<256;tmp++)
{
seg=PBYTE[tmp]; /* 访问W78E58B AUX-RAM */
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
/* 此处有问题，如改成下一句，访问程序存储器 */
/* 则正常。 */
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
// seg=sct_data[tmp];
P25=1;
P0=0;
P27=0; P27=1;
P0=tmp;_nop_();
P25=0; P25=1; // to lock low 8 bit addr /
P0=seg;for(nu=0;nu<10;nu++) _nop_();
we_29020=0;
we_29020=1; // write 29c020 /
}
ce_29020=1;
}
void deal32(uchar data ky)
{
......
EA=0;
cpy_mmry_29c020(rcd_sct_num1);
EA=1;
......
}
void t0() interrupt 1
{
......
}
void main()
{
......
CHPENR=0x87;
CHPENR=0x59;
CHPCON|=0x10;
CHPENR=0x00;
TR0=1;
EA=1;
......
while(1)
{
......
}
}
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