Changes
All of the devices on The Music Machine data bus are accessible to the Amstrad within its IO space. ACIA transactions must use 16-bit IO instructions; the converters are accesible via 8-bit IO instructions.
{|{{Prettytable|width: 700px; font-size: 2em;}}
|''I/O Map''||''Port''||''Meaning''
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|ADC START||&F8F8||Reading or writing to this port will start analogue to digital conversion
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|ADC READ||&F8F4(Read only)||The contents of the A-to-D can be read via this port. Note that the A-to-D must have been startet at least 20uS before this port can be read
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|DAC WRITE||&F8F0(Write only)||Data can written to the DAC via this port
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|INTERUPT SEL||&F8E8(Write only)||Writing 01 to this port disables internal Amstrad interrupts and replaces the IRQ signal from ACIA. Writing 00 restores normality.
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|ACIA Status||&F8EE(Read only)||Se Motorola datasheet
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|ACIA Data read||&F8EF(Read only)||Se Motorola datasheet
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|ACIA Control||&F8EC(Write only)||Se Motorola datasheet
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|ACIA Data write||&F8ED(Write only)||Se Motorola datasheet
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|-
|}
== Weblinks ==
