ks0108 + pcf8574

Nothing appears in the dispaly
I am trying to modify my old ks0108 128x64 to i2c, for this I used the scheme and the u8x8lib.cpp published by PaulRB in the topic https://forum.arduino.cc/index.php?topic=409966.90

the constructor is as follows:

U8G2_KS0108_128X64_F u8g2(U8G2_R0, U8X8_PIN_NONE, U8X8_PIN_NONE, U8X8_PIN_NONE, U8X8_PIN_NONE, U8X8_PIN_NONE, U8X8_PIN_NONE, 
U8X8_PIN_NONE, U8X8_PIN_NONE, /*enable=*/ U8X8_PIN_NONE, /*dc=*/ U8X8_PIN_NONE, /*cs0=*/ U8X8_PIN_NONE,/*cs1=*/ U8X8_PIN_NONE, 
/*cs2=*/ U8X8_PIN_NONE, /* reset=*/  U8X8_PIN_NONE);   // Set R/W to low!

as you can see in attachment I get a response from the serial print and everything seems ok in relation off the PCF8574.

my question is what am i doing wrong what changes to the programming level have not yet made.

thank you for your help

thanks

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