MT5C2565 +---\/---+ nc | 1 28 | Vcc a0 | 2 27 | a15 a1 | 3 26 | a14 a2 | 4 25 | a13 a3 | 5 24 | a12 a4 | 6 23 | a11 a5 | 7 22 | a10 a6 | 8 21 | nc a7 | 9 20 | nc a8 | 10 19 | dq4 a9 | 11 18 | dq3 /ce | 12 17 | dq2 /oe | 13 16 | dq1 Vss | 14 15 | /we +--------+ Micron MT5C2565, 28-Pin (small) DIP 64K*4 SRAM (with /OE) (Used for cache-RAM)