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Common

3. SPDT Switch. IC1. 1. 1K W. 2. NC. GND. +5V. Common. NO. 6. 4. 5. 1K W. GND. SPDT Switch. +5V. NC. NC (Normally closed). IRQ*. Common. GND. Common. NO. NO (Normally open). Left/Right and Front/Back are duplicate terminals. PE0. 2K W. GND. +5V. 14. 1. Vcc. 13. 2.

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Common

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  1. 3 SPDT Switch IC1 1 1KW 2 NC GND +5V Common NO 6 4 5 1KW GND SPDT Switch +5V NC NC (Normally closed) IRQ* Common GND Common NO NO (Normally open) Left/Right and Front/Back are duplicate terminals

  2. PE0 2KW GND +5V 14 1 Vcc 13 2 3 12 74LS02 11 4 10 5 6 9 7 8 GND

  3. Stars disappear when after leaving top row Screen updated once every 1/10 second * * * * * Launched stars start out in this row when button pushed * ^ Launcher moves according to slider position Stars advance upward one space every 3/10 second

  4. 2 4 6 8 10 12 14 16 18 20 22 24 26 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 1 3 5 7 9 11 13 15 17 19 21 23 25 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 MCU Port Bus Port Pin Function Pin Function 1 GND 2 D3 3 D2 4 D4 5 D1 6 D5 7 D0 8 D6 9 A0 10 D7 11 A1 12 A2 13 A10 14 A3 15 OE 16 A4 17 A11 18 A5 19 A9 20 A6 21 A8 22 A7 23 A12 24 A13 25 W/R 26 CS0 27 CS1 28 CS2 29 CS3 30 CS4 31 CS5 32 IRQ 33 +5V 34 M2 35 R/W 36 CS6 37 E 38 CS7 39 GND 40 RESET Pin Function Pin Function 1 PD0/RXD0 2 PD1/TXD0 3 PD2/MISO 4 PD3/MOSI 5 PD4/SCLK 6 PD5/SS/SEL0 7 PA0 8 PA1 9 PA2 10 PA3 11 PA4 12 PA5 13 PA6 14 PA7 15 PE7 16 PE3 17 PE6 18 PE2 19 PE5 20 PE1 21 PE4 22 PE0 23 VRL 24 VRH 25 GND 26 +5V IC1 A/D 1

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