Need sad Mac error code help!

[catstash]

I have this Macintosh Classic that might have a memory issue I have looked around on some different web pages but i am still pretty confused to how to read them.

I get

0 0 0 0 0 0 0 3
0 0 0 0 6 D F F

 

[pocketscience]

Per this page it is indeed a RAM memory test failure. What memory configuration is in the machine, and has the jumper on the logic board been configured appropriately?