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Tetris (NES, Nintendo)/ROM map: Difference between revisions
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{{Rommap|game=Tetris}} | {{Rommap|game=Tetris}} | ||
All addresses are in CPU address space, not iNES file space. You'll have to convert addresses for use in iNES, UNIF, or any other file format. | |||
<pre> | <pre> | ||
; Code: | ; Code: | ||
| Line 6: | Line 7: | ||
main = $8000 | main = $8000 | ||
soundWaitVBL = $AA45 ; Run sound code and wait for vblank NMI | soundWaitVBL = $AA45 ; Run sound code and wait for vblank NMI | ||
turnOffNMI = $AA78 ; Turn off | turnOnNMI = $AA6B ; Turn on interrupt at scanline 241 | ||
turnOffNMI = $AA78 ; Turn off interrupt at scanline 241 | |||
clearNametable = $AA82 ; Clear nametable whose base address is A | clearNametable = $AA82 ; Clear nametable whose base address is A | ||
clearVRAM = $AC1C ; If A < $1F, clear Y pages of VRAM to X | 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 | ; Otherwise, clear 4 pages of VRAM to X and clear attribute table to Y | ||
clearRAM = $AC6A ; Clear pages X to Y of CPU RAM to value in A | |||
switch = $AC82 ; Jumps to the Ath 16-bit address in the following jump table, | |||
; similar to the "magic jump" in Super Mario Bros. | |||
playSound = $E000 ; Appears to be sound code, called every frame | playSound = $E000 ; Appears to be sound code, called every frame | ||
; Data: | ; Data: | ||
Revision as of 21:11, 18 June 2006
The following article is a ROM map for Tetris (NES, Nintendo).
All addresses are in CPU address space, not iNES file space. You'll have to convert addresses for use in iNES, UNIF, or any other file format.
; Code:
reset = $FF00
main = $8000
soundWaitVBL = $AA45 ; Run sound code and wait for vblank NMI
turnOnNMI = $AA6B ; Turn on interrupt at scanline 241
turnOffNMI = $AA78 ; Turn off interrupt at scanline 241
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
clearRAM = $AC6A ; Clear pages X to Y of CPU RAM to value in A
switch = $AC82 ; Jumps to the Ath 16-bit address in the following jump table,
; similar to the "magic jump" in Super Mario Bros.
playSound = $E000 ; Appears to be sound code, called every frame
; Data:
initHiScores = $AD67 ; High score table, copied to $0700 on boot