Coleco Head To Head Football Chip labeled TMS1100 NLLE MP3460 WE 8018 die labeled MP3460 9 buttons 3 switches: Skill 1/Skill 2, Run Kick / Pass, 1 Player / 2 Players 9 7-segment LEDs (DP is under digit, digit 3 only has segments A, D, G and DP) 8 LEDs to the right of digits 2-9 Piezo buzzer TMS1100 pinout 1 R8 - digit 1 (rightmost) and Defense Left button 2 R9 - LEDs between digits 3 R10 - Piezo 4 VDD - 9V - 5 K1 - key matrix - 1 or 2 Players switch 6 K2 - key matrix - Pass or Run/Kick switch 7 K4 - key matrix - Skill 1 or 2 switch 8 K8 - key matrix - buttons 9 INIT - VDD 10 O7 - segment below digit 11 O6 - LED segment G 12 O5 - LED segment F 13 O4 - LED segment E 14 O3 - LED segment D 15 O2 - LED segment C 16 O1 - LED segment B 17 O0 - LED segment A 18 OSC1 - connected to OSC2 and 100pF disc cap (to VSS) and 39K resistor (to VDD) 19 OSC2 - OSC1 20 VSS - 9V + 21 R0 - Digit 9 (leftmost) and Skill 1 Switch, Pass switch, 1 Player switch and Offense Left/Right button 22 R1 - Digit 8 and Skill 2 Switch, Run/Kick switch, 2 Players switch and Offense Down button 23 R2 - Digit 7 and Offense Up button 24 R3 - Digit 6 and Offense K/P button 25 R4 - Digit 5 and Offense D button 26 R5 - Digit 4 and Defense Down button 27 R6 - Digit 3 and Defense Up button 28 R7 - Digit 2 and Defense Right button button matrix K1 K2 K4 K8 R0 1 Player Pass Skill 1 Offense Left/Right R1 2 Players Run/Kick Skill 2 Offense Down R2 Offense Up R3 Offense K/P R4 Offense D R5 Defense Down R6 Defense Up R7 Defense Right R8 Defense Left