YI Memory Map

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ROM Address	Length	Type	Description
$17BE3E	16 bytes	Map	Y-coordinates of each Yoshi on the world 4 map
$17BE4E	16 bytes	Map	Y-coordinates of each Yoshi on the world 5 map
$17BE5E	16 bytes	Map	Y-coordinates of each Yoshi on the world 6 map
$17E18E	10 bytes	Map	(X, X, Y, B, A) Button sequence that unlocks the Mini-Battle menu
$17F7C3	1332 bytes	Level Data	Level data long pointers, two per level, in translevel ID order ($00-$DD): First is header/object/screen exit (all in one) Second is sprite data
$18B3F2	74280 bytes	Layer 1 Tilemap	MAP16 page tables: data is word-sized SNES VRAM tilemap, split up into pages $00-$A7 and then further into 8-byte (4-word) chunks representing a single 16x16 tile (4 8x8 entries together)
$20B0B6	15992 bytes	Sound Effect	Waves crashing on island (BRR)
$20EF2F	2339 bytes	Sound Effect	Seagulls on island (BRR)
$21B3FB	19461 bytes	Empty	Empty (filled with FF)
$229333	682 bytes	Text	Intro cutscene message box text: "This paradise is Yoshi's Island, where all the Yoshies live. They are all in an uproar over the baby that fell from the sky. Wait! The baby seems to know where he wants to go. The bonds between the twins informs each of them where the other one is. The Yoshies decide to carry the baby to his destination via a relay system. Now begins a new adventure for the Yoshies and Baby Mario."
$229825	140 bytes	Text	"Hovering Jump" message box text (from Welcome level)
$2298C7	225 bytes	Text	"Making Eggs" message box text (from level 1-1)
$22C20B	38 bytes	Text	"Try this stage again?" text
$22C248	47 bytes	Text	"Restart from the middle ring?" text
$22D348	44216 bytes	Empty	Empty (filled with FF)
$248000	32768 bytes	Graphics	Uncompressed tile graphics, 4bpp, 32 bytes per 8x8 tile, 1024 tiles
$258000	32768 bytes	Graphics	Uncompressed tile graphics, 4bpp, 32 bytes per 8x8 tile, 1024 tiles
$268000	32768 bytes	Graphics	Block of two 256x128 Super FX bitmaps, separated by high & low nibble (map screen icons)
$278000	16384 bytes	Graphics	Block of two 256x64 Super FX bitmaps, separated by high & low nibble (selection screen & bonus screen icons)
$27C000	16384 bytes	Graphics	Uncompressed tile graphics, 4bpp, 32 bytes per 8x8 tile, 512 tiles
$288000	32768 bytes	Graphics	Block of two 256x128 Super FX bitmaps, separated by high & low nibble
$298000	32768 bytes	Graphics	Block of two 256x128 Super FX bitmaps, separated by high & low nibble
$2A8000	32768 bytes	Graphics	Block of two 256x128 Super FX bitmaps, separated by high & low nibble
$2B8000	32768 bytes	Graphics	Block of two 256x128 Super FX bitmaps, separated by high & low nibble
$2C8000	32768 bytes	Graphics	Block of two 256x128 Super FX bitmaps, separated by high & low nibble (mostly island cutscene)
$2D8000	26624 bytes	Graphics	Uncompressed tile graphics, 2bpp, 16 bytes per 8x8 tile, 1664 tiles
$2DE800	6144 bytes	Graphics	Uncompressed tile graphics, 4bpp, 32 bytes per 8x8 tile, 192 tiles
$2E8000	15360 bytes	Graphics	Block of two 256x60 Super FX bitmaps, separated by high & low nibble (French & German icon graphics)
$2EBC00	3305 bytes	Graphics	LC_LZ1 file $000: 4bpp, 4kb
$2EC8E9	3186 bytes	Graphics	LC_LZ1 file $001: 4bpp, 4kb
$2ED55B	3289 bytes	Graphics	LC_LZ1 file $002: 4bpp, 4kb
$2EE234	3191 bytes	Graphics	LC_LZ1 file $003: 4bpp, 4kb
$2EEEAB	2638 bytes	Graphics	LC_LZ1 file $004: 4bpp, 4kb
$2EF8F9	2419 bytes	Graphics	LC_LZ1 file $005: 4bpp, 4kb
$2F826C	2892 bytes	Graphics	LC_LZ1 file $006: 4bpp, 4kb
$2F8DB8	2970 bytes	Graphics	LC_LZ1 file $007: 4bpp, 4kb
$2F9952	3096 bytes	Graphics	LC_LZ1 file $008: 4bpp, 4kb
$2FA56A	2401 bytes	Graphics	LC_LZ1 file $009: 4bpp, 4kb
$2FAECB	2789 bytes	Graphics	LC_LZ1 file $00A: 4bpp, 4kb
$2FB9B0	2241 bytes	Graphics	LC_LZ1 file $00B: 4bpp, 4kb
$2FC271	3120 bytes	Graphics	LC_LZ1 file $00C: 4bpp, 4kb
$2FCEA1	3353 bytes	Graphics	LC_LZ1 file $00D: 4bpp, 4kb
$2FDBBA	3232 bytes	Graphics	LC_LZ1 file $00E: 4bpp, 4kb
$2FE85A	2925 bytes	Graphics	LC_LZ1 file $00F: 4bpp, 4kb
$2FF3C7	1175 bytes	Graphics	LC_LZ1 file $010: 2bpp, 2kb
$2FF85E	1420 bytes	Graphics	LC_LZ1 file $011: 2bpp, 2kb
$2FFDEA	1139 bytes	Graphics	LC_LZ1 file $012: 2bpp, 2kb
$30825D	388 bytes	Graphics	LC_LZ1 file $013: 2bpp, 2kb
$3083E1	1269 bytes	Graphics	LC_LZ1 file $014: 2bpp, 2kb
$3088D6	911 bytes	Graphics	LC_LZ1 file $015: 2bpp, 2kb
$308C65	872 bytes	Graphics	LC_LZ1 file $016: 2bpp, 2kb
$308FCD	1300 bytes	Graphics	LC_LZ1 file $017: 2bpp, 2kb
$3094E1	1611 bytes	Graphics	LC_LZ1 file $018: 2bpp, 2kb
$309B2C	1198 bytes	Graphics	LC_LZ1 file $019: 2bpp, 2kb
$309FDA	758 bytes	Graphics	LC_LZ1 file $01A: 2bpp, 2kb
$30A2D0	1422 bytes	Graphics	LC_LZ1 file $01B: 2bpp, 2kb
$30A85E	1891 bytes	Graphics	LC_LZ1 file $01C: 2bpp, 2kb
$30AFC1	1569 bytes	Graphics	LC_LZ1 file $01D: 2bpp, 2kb
$30B5E2	1618 bytes	Graphics	LC_LZ1 file $01E: 2bpp, 2kb
$30BC34	994 bytes	Graphics	LC_LZ1 file $01F: 2bpp, 2kb
$30C016	1285 bytes	Graphics	LC_LZ1 file $020: 4bpp, 2kb
$30C51B	1369 bytes	Graphics	LC_LZ1 file $021: 4bpp, 2kb
$30CA74	1355 bytes	Graphics	LC_LZ1 file $022: 4bpp, 2kb
$30CFBF	2729 bytes	Graphics	LC_LZ1 file $023: 4bpp, 4kb
$30DA68	2863 bytes	Graphics	LC_LZ1 file $024: 4bpp, 4kb
$30E597	3192 bytes	Graphics	LC_LZ1 file $025: 4bpp, 4kb
$30F20F	3090 bytes	Graphics	LC_LZ1 file $026: 4bpp, 4kb
$30FE21	1422 bytes	Graphics	LC_LZ1 file $027: 2bpp, 2kb
$3183AF	1310 bytes	Graphics	LC_LZ1 file $028: 2bpp, 2kb
$3188CD	1474 bytes	Graphics	LC_LZ1 file $029: 2bpp, 2kb
$318E8F	1765 bytes	Graphics	LC_LZ1 file $02A: 2bpp, 2kb
$319574	1394 bytes	Graphics	LC_LZ1 file $02B: 2bpp, 2kb
$319AE6	617 bytes	Graphics	LC_LZ1 file $02C: 4bpp, 4kb
$319D4F	629 bytes	Graphics	LC_LZ1 file $02D: 4bpp, 4kb
$319FC4	777 bytes	Graphics	LC_LZ1 file $02E: 4bpp, 4kb
$31A2CD	773 bytes	Graphics	LC_LZ1 file $02F: 4bpp, 4kb
$31A5D2	3183 bytes	Graphics	LC_LZ1 file $030: 4bpp, 4kb
$31B241	3039 bytes	Graphics	LC_LZ1 file $031: 4bpp, 4kb
$31BE20	2930 bytes	Graphics	LC_LZ1 file $032: 4bpp, 4kb
$31C992	3554 bytes	Graphics	LC_LZ1 file $033: 4bpp, 4kb
$31D774	3325 bytes	Graphics	LC_LZ1 file $034: 4bpp, 4kb
$31E471	2498 bytes	Graphics	LC_LZ1 file $035: 4bpp, 4kb
$31EE33	2805 bytes	Graphics	LC_LZ1 file $036: 4bpp, 4kb
$31F928	2435 bytes	Graphics	LC_LZ1 file $037: 4bpp, 4kb
$3282AB	3026 bytes	Graphics	LC_LZ1 file $038: 4bpp, 4kb
$328E7D	3047 bytes	Graphics	LC_LZ1 file $039: 4bpp, 4kb
$329A64	3315 bytes	Graphics	LC_LZ1 file $03A: 4bpp, 4kb
$32A757	3291 bytes	Graphics	LC_LZ1 file $03B: 4bpp, 4kb
$32B432	3450 bytes	Graphics	LC_LZ1 file $03C: 4bpp, 4kb
$32C1AC	3261 bytes	Graphics	LC_LZ1 file $03D: 4bpp, 4kb
$32CE69	2601 bytes	Graphics	LC_LZ1 file $03E: 4bpp, 4kb
$32D892	3162 bytes	Graphics	LC_LZ1 file $03F: 4bpp, 4kb
$32E4EC	3413 bytes	Graphics	LC_LZ1 file $040: 4bpp, 4kb
$32F241	3283 bytes	Graphics	LC_LZ1 file $041: 4bpp, 4kb
$32FF14	2983 bytes	Graphics	LC_LZ1 file $042: 4bpp, 4kb
$338ABB	3060 bytes	Graphics	LC_LZ1 file $043: 4bpp, 4kb
$3396AF	1416 bytes	Graphics	LC_LZ1 file $044: 4bpp, 4kb
$339C37	2954 bytes	Graphics	LC_LZ1 file $045: 4bpp, 4kb
$33A7C1	3107 bytes	Graphics	LC_LZ1 file $046: 4bpp, 4kb
$33B3E4	3239 bytes	Graphics	LC_LZ1 file $047: 4bpp, 4kb

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