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How to initialize Phillip 89c668

ina128 ina128

Hi
Could anyone help me to initialize 89c668.
I use RTX51.And I use internal ROM and internal RAM.I have write a simple code in it,but it can not run at all.

AUXR &= 0xfd;
WDTRST= 0x1e;
WDTRST= 0xe1;
P1=0;

Thank in advance

Lu Qi