PDF of 177 KB titled 29F010, filed in the schematics section with no brand or board named. The 29F010 code is widely used for 1 Mbit parallel NOR flash, typically found on older equipment storing firmware. A technician would use the document for pinout, address and data line layout, timing and the command sequences needed for programming. It is useful when setting up a parallel programmer or tracing address lines. Check the package type and marking, and keep a dump of the original chip.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.