CHIP:

- New translation/adaptation of a Z80 tracker player for the 6502. This time, the player is for CHP files from CHIPNSFX Tracker.
Concerning CPU use, playing CHP files is probably between AKY (least) and PT3 (most).
But CHP files are rather compact: 19.4 KB (uncompressed) for all the 8 files used in CHIP!

- 6502 Player was done from Z80 Player version 20190731. Player and tracker are interdependent. So, you must use this player with songs made with CHIPNSFX v20190731. 

- Typical command line to export track from tracker: CHIPNSFX.EXE -R SLAPFITF.CHP track.a
   -> track.a will probably have to be edited to get a version compatible with your 6502 assembler.
   -> add header to track.a (check source code to know what to do)
   -> add track.a and player_CHIPNSFX.a to your project.

- For the display part, I used two interrupts to have a split screen (HGR/TEXT).
It is thus possible to have a synchronized display without having to count the cycles for each frame! 
Especially like here where there are not constant.

- This display is there to illustrate CPU time used by the player. The blue part of the CHIP logo is larger or smaller depending on the CPU time used to play one tick.
This is why the release requires PAL/50Hz to run: the start of the display must be synchronized with the player.
Of course the player could otherwise be used with an APPLE II NTSC.