仿真器仿真时，89C52内部ram才使用了120多Byte,为什么就不够了

只看该作者 · 2007-9-15 09:14

89C52不是有256字节的空间吗，00H-7FH为基本的数据存储空间，80H-FFH为间接的数据存储空间，我才使用了120多为什么就不够用了呢？请各位大哥指点一下！

只看该作者 · 2007-9-15 09:52

可能是00-7FH用满了吧。
另外位地址和R0-R7、栈。都是占用内存的。
80-FFH内存只能用于间接寻址。不能直接寻址。
尝试调整一下试试。
把数组声明改改。
例：unsigned char idata aaa[40];

只看该作者 · 2007-9-15 10:31

WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
            SEGMENT: ?PR?WRITEDIG5?KEYLCD
         ERROR L107: ADDRESS SPACE OVERFLOW
            SPACE:   IDATA
            SEGMENT: ?ID?KEYLCD
            LENGTH:  0038H
         WARNING L1: UNRESOLVED EXTERNAL SYMBOL
            SYMBOL:  SYN_DEC
            MODULE:  KEYLCD.OBJ (KEYLCD)
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  KEYVAL
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  M
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  DIG3
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  DIG2
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  DIG1
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  SYN
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  NUM
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  RDT
            SEGMENT: ?ID?KEYLCD
         ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
            SYMBOL:  VOL0
            SEGMENT: ?ID?KEYLCD
         WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
            SYMBOL:  SYN_DEC
            MODULE:  KEYLCD.OBJ (KEYLCD)
            ADDRESS: 0FFDH
      <连接器提示> LINK/LOCATE RUN COMPLETE.  3 WARNING(S),  10 ERROR(S)
      <MedWin提示> 连接过程中发现错误或错误的连接器
      连接失败！