[update] #22
Description
1 There has been a change in the way the selection list cursor is generated. It is now based on the DLI interrupt, which modifies the colors on the line where the cursor is. As a result, bugs have come to light, including one related to a bug in the 6502 processor, where when NMI and IRQ interrupts occur simultaneously, the NMI interrupt is not executed.
A patch has been made, but it does not always work - inquiry into the causes is underway.
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the tempo determination for the song has been improved. now, the data from the Time Signature meta event is also taken into account. this allowed to properly calculate the MIDI clock interval, which reduced the likelihood of bad song playback.
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The number of clock cycles (CPU) that POKEY Timer1 handles has been reduced.
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Abandoned support for primary memory as an area for MID file data. From now on, it became a requirement to have a minimum of 64KB of secondary memory. Sorry.