Hello, the playfield is also blocky. The cart is ok cause it works flawlessly in other mobo I have. The sound is ok also.
Which are the SRAMS? I have this chips: HY6264A LLJ-10 (RAM 9 & RAM10) and LH52B256N-70LL (RAM5 & RAM6)
Also, there are 74LS32, 74HC04A and 74HC259A, 74LS273