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mode7: play music at 25Hz
sounds horrible for now
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@ -74,14 +74,15 @@ mockingboard_setup:
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sta $C40D ; IFR: 1100, enable interrupt on timer one oflow
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sta $C40D ; IFR: 1100, enable interrupt on timer one oflow
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sta $C40E ; IER: 1100, enable timer one interrupt
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sta $C40E ; IER: 1100, enable timer one interrupt
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lda #$E7
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lda #$40
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sta $C404 ; write into low-order latch
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sta $C404 ; write into low-order latch
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lda #$4f
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lda #$9c
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sta $C405 ; write into high-order latch,
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sta $C405 ; write into high-order latch,
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; load both values into counter
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; load both values into counter
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; clear interrupt and start counting
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; clear interrupt and start counting
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; 4fe7 / 1e6 = .020s, 50Hz
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; 4fe7 / 1e6 = .020s, 50Hz
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; 9c40 / 1e6 = .040s, 25Hz
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;============================
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;============================
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