MMC5 pulse phase reset Support.

[B00daW]

Phase reset works on hardware by doing the below pseudocode:

SAVE current MMC5 pulse channel x period state to blah
WRITE %xxxxx000.00000000 to MMC5 pulse channel x period
WRITE blah back to MMC5 pulse channel x period

The command is already assigned to H00/I00 for the 2a0x pulse channels.

Not all emulators support period values of MMC5 >0x08 due to inaccuracy. FamiTracker seems to emulate them.

[B00daW]

not certain, but this may work for MMC5 pulse phase reset
in "player.s"

; MMC5
.if .defined(USE_MMC5) ; Pulse phase reset --B00
ft_cmd_mmc5_phase_reset:
    jsr ft_get_pattern_byte
    sta var_ch_periodCalcLo + MMC5_OFFSET, x
    and #$07
    sta var_ch_periodCalcHi + MMC5_OFFSET, x
    rts

have to define a command byte for it too
have to do a hard limit in FamiTracker do disallow nonzero values

.if .defined(USE_MMC5)  ; E0
    .word ft_cmd_mmc5_phase_reset
.endif

there ya go
then ft_get_pattern_byte value 0xE0 will be the phase reset command