Strategy for reverse engineering a simple PCB

[NivagSwerdna]

Please see attached image

I would like to draw a schematic for the following PCB (I also have a scan for the bottom layer)...

It is a simple 2 layer board from the 1980s which replaces some custom Konami silicon which is now unobtainium

Are there any tools that allow me to draw a PCB but then go backwards to the schematic?

Thanks in advance

[helius]

Are there any tools that allow me to draw a PCB but then go backwards to the schematic?

More seriously, I think some EDA programs do have the ability to link layout and schematic editors, but they are not designed to be used to infer a schematic from a layout.

[soldar]

I have successfully done this by taking photos or scans of both sides and then working with them with a graphics program like Photoshop but you still have to do a lot of manual work confirming paths, connections, etc. It is very time consuming but it can be done.

[amyk]

Post both sides, someone may help.

What I do is put the parts in the same relative position in a schematic editor, then draw the traces in the same way.

Besides the top left component (which appears to have been sanded), everything else there looks like standard TTL.

[NivagSwerdna]

Thanks.  Maybe DaveCAD is a good approach.

The circuit should be logically divided into three... but I haven't worked out the detail yet