MARK: - Keyboard.

Sets the current value of the CRC.

Sets the Z flag per the 8- or 16-bit value @c value; @c shift should be 0 to indicate an 8-bit value or 8 to indicate a 16-bit value.

! Maps from a mass-storage device address to an address in the underlying volume. */

Enqueues an update-to-now into the AY's deferred queue.

! @returns the value on the data bus — all 16 bits, with any inactive lines (as er the upper and lower data selects) being represented by 1s. Assu

@returns @c true if an interrupt at level @c level should be accepted; @c false otherwise.

@returns @c true if the alternative zero page should be used; @c false otherwise.

! Announces a pulse at the current time. */

! @returns The way that the address for an operation with @c addressing_mode and encoded starting from @c operation would appear in an assembler. E

@returns the head position at maximal but unspecified precision.

MARK: - uPD7002::Delegate.

Handles JO, JNO, JB, etc — anything with only a displacement.

! Communicates that it is likely to be a while before any more tracks are written. */

! Attempts to read the next byte from the cassette, with data encoded at the rate as defined by @c speed. Attempts exactly to duplicate the MSX's

! @returns Whatever the ULA or gate array would expose via the floating bus, this cycle. */

! @returns the expected length of a complete scan and retrace cycle. */

! @returns the address of the word or byte being accessed at byte precision, in the endianness of the host platform. So: if this is a word acce

Provided for setup.

@returns @c true if a vertical retrace interrupt has been signalled since the last call to @c interrupt(); @c false otherwise.

The multiplicand register index. i.e. 'Rs'.