Entex Raise The Devil pinball Chip labeled MP1221 MSL^8023 die labeled MP1221 3 buttons: L/R flippers and shoot ball 1 switch: Skill 1234 4-digit 7-segment LED (rightmost digit not used) 39 LEDs piezo TMS1100 pinout 1 R8 - LED matrix 2 R9 - LED matrix 3 R10 - piezo 4 VDD - battery - 5 K1 - shoot ball and Skills 3 and 4 6 K2 - left flipper 7 K4 - right flipper 8 K8 - N/C 9 INIT - VDD 10 O7 - N/C 11 O6 - segment G 12 O5 - segment F 13 O4 - segment E 14 O3 - segment D 15 O2 - segment C 16 O1 - segment B 17 O0 - segment A 18 OSC1 - 47pF disc cap and Skill 1 = 47K, Skills 2 and 3 add 150K (about 35K8 total), Skill 4 adds 100K (about 32K total) 19 OSC2 - OSC1 20 VSS - battery + 21 R0 - digit 2 and buttons 22 R1 - digit 3 and Skills 3 and 4 23 R2 - digit 4 (leftmost) 24 R3 - LED matrix 25 R4 - LED matrix 26 R5 - LED matrix 27 R6 - LED matrix 28 R7 - LED matrix LED matrix R3 R4 R5 R6 R7 R8 R9 A 1 6 13 23 34 36 42 B 2 7 14 24 35 37 43 C 3 8 15 25 17 38 40 D 4 9 20 26 18 39 41 E 5 10 21 27 33 28 29 F 11 32 31 30 clock rate on Pin 28 skill 1 - 17mS skill 2 and 3 - 13.4mS skill 4 - 12.2 mS