Indicates that a @c CHK was performed, along with whether the result @c was_under zero or @c was_over the source operand.

Indicates that an @c Scc was performed; if @c did_set_ff is true then the condition was true and FF written to the operand; otherwise 00 was written.

Indicates that a potential pipeline-affecting status flag change occurred, i.e. a change to processor mode or interrupt flags.

@returns The dynamic storage size argument supplied to an ENTER.

Yamaha and TMS helpers.

! Announces to the predictor that the work of producing an output frame has ended; the predictor will use the amount of time between each begin/en

! Causes the 6560 to flush as much pending CRT and speaker communications as possible. */

Generate lookup table for sound output levels, and hold it only once regardless of how many template instantiations there are of @c Sound.

! @returns the number of synchronisation events that have seemed surprising since the last time this method was called; a low number indicates goo

! @returns a bit mask of the currently pressed buttons. */

Gets this machine's clock rate.

! Returns the current 'phase' — 0 is the start of the display; a count up to 0 from a negative number represents the retrace period and it will th

! @returns the amount of time since retrace last began. Time then counts monotonically up from zero. */

Gets the type of display.

@returns @c true if an error has occurred since the error flag was last reset; @c false otherwise.

! Gets the flags register. @see set_flags @returns The current value of the flags register. */

Provides the chipset's current interrupt level.

! @returns The current state of the interrupt output. */

@returns The value that a Kempston joystick interface would report if this joystick were plugged into it.

! @returns the amount by which the @c locked_period was adjusted, the last time that an adjustment was applied. */

! Obtains the last value the video read prior to time now+offset, according to the *current* video mode, i.e. not allowing for any changes still e

! @returns the actual current period for a complete scan (including retrace). */

! @returns the actual length of the scan period (excluding retrace). */