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wdcai
Visitor II
June 3, 2004
Question

how to map mainflash(256K0 into both code and xdata?

  • June 3, 2004
  • 2 replies
  • 494 views
Posted on June 04, 2004 at 00:16

how to map mainflash(256K0 into both code and xdata?

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    2 replies

    W
    wdcaiAuthor
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 12:01

    Dear Sir!

    I want to map 256K mainflash into both code and xdata area. I config page register bit 0,1,2,and fs0 to fs6 is located in page 0 to page6 in xdata,fs7 in code area.

    fs0 to fs6,from ( 8000h to ffffh & !psen , I think !_rd&!_wr is also ok)

    fs7(8000h to ffffh &psen).

    but when I acess page 0~page6 using XBYE[0x8000+i],

    it seems fs0 (page0) is always selected whatever pageregister is 0 or other value, page switch can't work at all.

    can anybody help me? Thanks!
    W
    wdcaiAuthor
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 12:01

    I have solved this problem, rs0, csiop don't need any & operator! if _RD or _WR is mixed in the equaltion, problem will occur!

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