| 1. | There is also a 4-bit volume control register per channel.
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| 2. | Reading the control register would automatically deassert / INTR.
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| 3. | The Audio Channel control registers provide volume and distortion control over individual sound channels.
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| 4. | Control registers always contained 7 bits, with the most significant bits always being 01.
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| 5. | Typically, this would restore the control registers to known good values stored in ACIA was accomplished.
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| 6. | Each buffer had a control register and status register to monitor its state and configure the raising of interrupts.
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| 7. | Writes to that address program the FIFO control register, but there is no way to read it back.
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| 8. | Each oscillator has a 5-bit frequency divider and a 4-bit audio control register which manipulates the waveform.
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| 9. | Common tasks performed by control registers include interrupt control, switching the addressing mode, paging control, and coprocessor control.
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| 10. | On x86-64 processors in long mode, it ( and the other control registers ) is 64 bits long.
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