哪位高手使用过NE64的外扩功能，窄扩展功能或者宽扩展。 举个简单的例子，例如读写外部0X8000处的数据。 主要是相关寄存器的设置，还有读写程序！ .prm中设置： PAGE_32 = READ_WRITE 0x328000 TO 0x32BFFF; DATA_PAGE INTO PAGE_32;
main中设置： #include <hidef.h> /* common defines and macros */
#include <MC9S12NE64.h> /* derivative information */ #pragma DATA_SEG __PPAGE_SEG DATA_PAGE unsigned char MR1@0X80010; #pragma DATA_SEG DEFAULT void main(void) {
unsigned char *__far ptr;
CLKSEL=0;
CLKSEL_PLLSEL = 0; /* Select clock source from XTAL */
PLLCTL_PLLON = 0; /* Disable the PLL */
SYNR = 11; /* Set the multiplier register 2 2 */
REFDV = 7; /* Set the divider register 7 8 */
PLLCTL = 192; PLLCTL_PLLON = 1; /* Enable the PLL */
while(!CRGFLG_LOCK); /* Wait */
CLKSEL_PLLSEL = 1; /* Select clock source from PLL */
///expended ram init///////////////////////////////////////
RDRIV=0x00;
PEAR=0X0C;
EBICTL=0X01;//0:free run
MISC=0X01;
MODE=0XAB;//normal expended wide
ptr=(unsigned char *__far)&MR1;
*ptr=0x80; } 但是好像数据不是很对，问题在哪呢！！？？ 哪位高手指点一下！！谢谢 | 
