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Tetris (NES, Nintendo)/ROM map
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The following article is a ROM map for Tetris (NES, Nintendo).
; Code:
reset = $FF00
main = $8000
soundWaitVBL = $AA45 ; Run sound code and wait for vblank NMI
turnOffNMI = $AA78 ; Turn off interrupts
clearNametable = $AA82 ; Clear nametable whose base address is A
clearVRAM = $AC1C ; If A < $1F, clear Y pages of VRAM to X
; Otherwise, clear 4 pages of VRAM to X and clear attribute table to Y
playSound = $E000 ; Appears to be sound code, called every frame
; Data:
initHiScores = $AD67 ; High score table, copied to $0700 on boot