• Help! About W77e58's DEC DPTR instruction.......
    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???? ...
  • Dec to hex
    I had declared an variablw like below, unsigned int i; Normally the data representation may be in either decimal or hexadecimal. In my project the value of 'i' is decimal i need that unsigned...
  • Write/Read Flash into W77e58
    I'm trying to write and read internal RAM with w77e58 but without success. I'm using the following code. #include<string.h> #include<W77E58.h> unsigned char xdata xdata_buffer [1]; void...
  • w77e58 read or write
    How Can I read/write 1K SRAM on chip with w77e58 in keil c51?
  • Dual DPTR
    Hi I want to use dual DPTR on my 89c669 from Philips. When i insert the pragma #pragma modp2 I get this error(s) *** ERROR L127: UNRESOLVED EXTERNAL SYMBOL SYMBOL: ?C?STRCPYP2 MODULE: ....