That is now solved. Thanks to advise from other forum I used Flashrom 1.6 and managed to read this IC....

Hi. I got a Dell laptop with MX77U51250FZ4I42 SPI flash as per photo.
I am using CH341A with 1.8V adapter to try and read it. I did micro soldered under uscope wires directly to the chip on the board.
Neither of software (NeoProgrammer, Asprogramer and few other) is recognizing this chip.
No datasheet available. Emailed Macronix - they said datasheet is "not available for individuals I'm afraid".
I tried manual settings of size (67,108,864 Bytes) and different Page size (128, 256, 512) but although it does start and finish reading process all I get are zeros?...