Here's something I just noticed. So at 18,19,31,&36 I have 27c301 (hitachi). At 30 I have M5M27c100k (mitsubishi) an at 35 I have D27C1000D (NEC)
Pinouts respectively here:
My 2 chips I have tried are as follows:
MX27C1000DC (Macronix) & NM27C010Q (National Semi). I based this choice on the...