ROM Test layout
  0  1  2  3  4  5  6  7
0 R0 R1 R2 R3 S0 S1 S2 S3
1 D0 D1 D2 D3 A0 A1 A2 A3
2 K0 K1 NC NC M0 M1 M2 M3
3 KS ET VB AM F0 F1 F2 NC
4 DM DC T0 T1 T2 T3 T4 T5

Pin config:
0:
/(A13&/M2&/P15)
FMCS
WR
/A0
1:
/(A13&/M2&/P15)
FMCS
WR
A0
2:
/(A13&/M2&/P15)
/FMCS
WR
/A0
3:
/(A13&/M2&/P15)
/FMCS
WR
A0
4:
/(A13&/M2&/P15)
FMCS
/WR
/A0