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OAM Bug #192

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nnarain opened this issue Dec 10, 2018 · 0 comments

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nnarain commented Dec 10, 2018

http://bgb.bircd.org/pandocs.htm#spriterambug

There is a flaw in the GameBoy hardware that causes trash to be written to OAM RAM if the following commands are used while their 16-bit content is in the range of $FE00 to $FEFF:
  inc rr        dec rr          ;rr = bc,de, or hl
  ldi a,(hl)    ldd a,(hl)
  ldi (hl),a    ldd (hl),a
Only sprites 1 & 2 ($FE00 & $FE04) are not affected by these instructions.

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nnarain self-assigned this

nnarain added the enhancement label

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