25 lines
515 B
Arduino
25 lines
515 B
Arduino
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/**
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* SN76489 sound chip test
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*
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* DATA BUS IS: 3, 4, 5, 6, 7, 8, 9, 10 (NOTE: 3 is D0, but D0 is the MSB)
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* WE 11 (Active low)
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*/
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void setup() {
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DDRD = DDRD | B11111000; // Port D (arduino pins 3 to 7) is output. In or to preserve serial pins and interrupt pin
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DDRB = B00001111; // Port B (0,1,2,3) = pins 8,9,10,11 output (11 is WE)
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}
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void loop() {
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}
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void writeByte(byte b) {
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// Split byte to two parts and write to data bus
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PORTD = b << 3;
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PORTB = b >> 5;
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// Pulse WE
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b
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}
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