Since atari was weird, missile command needs 2 eproms for a 'single rom' hack. Eprom 1: This will require a 2732 in N/P1 or R1. To prepare the data: cat 035824.02 035825.02 > R1.bin (0x7000-0x7fff) The pinout of the 2732 matches the 2716, with the addition of A11 at pin 21 instead of Vpp. Since this will be the only eprom in the bank of 4, /CE and /OE (pins 18 and 20) can be tied to ground, pin 21 just tied to A11. Pin 18 is actually already ground, so bend out pins 20 and 21 on a socket, and wire 20 to gnd, and 21 to either pin 3 or 13 of P2. Eprom 2: This will require a 2764 in H1, J/K1, K/L1, or L/M1. To prepare the data: cat 035820.02 035821.02 > H1.bin (0x5000-0x5fff) cat 035822.02 035823.02 > KL1.bin (0x6000-0x6fff) cat KL1.bin H1.bin > LM1.764 This looks backwards, but since we're going to use A12 to for the high addresss bit and ignore A13-15, the addresses shadow down to 0x1000-0x1fff and 0x0000-0x0fff, so KL1 needs to be first. The pinout of the 2764 mostly matches the 2716 (well, at least for the pins they share ;) On a 28-pin socket bent out pins 1,2,20,21,27,28. Wire 1, 27, and 28 to Vcc. 20 to GND, 21 to A11 (from pin 3 or 13 of P2). Wire pin 2 to A12 (pin 15 of N2). If all went well, your missile command works more reliably now ;)