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Help! About W77e58's DEC DPTR instruction.......

Tom Gates AA

With Keil uv2, I create a new project,
then select the device W77e58, But when I use the additional instruction, the Keil's 8051 toolchains can not work, it say that no such instruction.

Why????

Thanks for your help!

Parents
  • 0 in reply to Andrew Neil

    The REAL problem is that there are many more than 1 extra instructions that use the A5 unused opcode. None of them are standard and none of them is portable to other chips.

    So, rather than create 100 or so new directives that allow support 100 or so "new instructions" we thought it was just as easy to require the user to create a 3 line macro to do the same thing.

    Jon

Reply
  • 0 in reply to Andrew Neil

    The REAL problem is that there are many more than 1 extra instructions that use the A5 unused opcode. None of them are standard and none of them is portable to other chips.

    So, rather than create 100 or so new directives that allow support 100 or so "new instructions" we thought it was just as easy to require the user to create a 3 line macro to do the same thing.

    Jon

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