Changes

PSG

100 bytes removed, 1 April

/* Bit 1 (Alternate) and Bit 0 (Hold) */

volume = ~volume & 0x0F if !(alternate ^ hold)

direction = 0 if hold else ~direction & 1 if alternate

~~When bit3 = 0, volume and direction at the end of a period always are:~~

~~volume = 0~~

~~direction = 0~~

=== 0Eh - External Dataregister Port A ===

12,104

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