Hello and thanks for taking the time to read my post.
I have a device I use in my business, several actually, that use a 256k (32K x 8bit) Eprom to hold what is probably a rather simple program and/or a look up table of some sort. Basically, as best as I can determine, the system will output a specific DC signal level for a very short period at the exact same moment in time over and over with different levels for different times. That's all it has to do, really.
I have no diagrams for this part of the device but the components on the small maybe 1.5" x 2" pc board are all marked. What I need to do is get access to what's inside the Eprom so I can make changes to some of these levels. I have an EMP 10 programmer and, if I get hold of an SO IC adaptor, I can read what's inside the Eprom. However, I'm not an engineer so I have no idea what I'm looking at so I'd just be poking around looking at smily faces and hearts and things.
Is there a way to go backwards from this point not knowing any more than this?
How would I need to proceed or is there someone out there who can help?