Ojamajo Doremi ♯
Ojamajo Doremi ♯ |
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Developer: Fupac This game has debugging material. |
A game based on the second season of the television show Ojamajo Doremi.
Debug Menu
Please elaborate. Having more detail is always a good thing. Specifically: Can this be cleaned up/rewritten for an audience that may not understand assembly code? |
When reading the page number from the I/O data address, the game compares the read value against a table of known values:
page_num_first XREF[2]: read_page:00003356(*), read_page:0000335c(R) 00003370 00 ?? 00h page_num_values XREF[1]: read_page:0000335c(R) 00003371 01 ?? 01h 00003372 03 ?? 03h 00003373 07 ?? 07h 00003374 0f ?? 0Fh 00003375 3f ?? 3Fh ? 00003376 1f ?? 1Fh 00003377 00 ?? 00h
Page 5 corresponds to the debug menu handler. However, the comparison function only checks up to address 00003375, due to the cycle counter being set to 5 instead of 6. Therefore, page 5 (value 1Fh) is never returned by the function:
read_page XREF[3]: 0000322a(c), 00003272(c), 00003324(c) 00003346 12 39 00 move.b (IO_PAGE).l,D1b ; read page from memory 80 00 0d 0000334c 02 81 00 andi.l #0x3f,D1 00 00 3f 00003352 70 00 moveq #0x0,D0 00003354 74 05 moveq #0x5,D2 ; cycle counter 00003356 43 f9 00 lea (page_num_first).l,A1 00 33 70 LAB_0000335c XREF[1]: 00003364(j) 0000335c b2 19 cmp.b (A1)+=>page_num_first,D1b = 01h ; compare and increment index 0000335e 67 00 00 0e beq.w LAB_0000336e ; match found, exit cycle 00003362 52 80 addq.l #0x1,D0 00003364 51 ca ff f6 dbf D2w,LAB_0000335c ; decrement counter and branch
In practice, when the player opens page 5, the previously open page is kept loaded. We can instead set the counter to 6, so that page 5 can be loaded, by applying the following patch: 00003354 = 74 06
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Menu entries (most are used for loading specific mini-games / scenes):
SOUND TEST KEY TEST PG5 TEST NIKUKUIGAME HAKOBUGAME TAKOYAKIGAME GARD GAME1 HOUKIRESU POPPU HOUKIRESU ONNPU JANNKENN GAME SYAFFURU GAME MAJORIKA GAME POPPU OTUKAI ISOGE ONNPUTYAN AIDORU SUTEEGI DOREMINO MIRUKU AIKO TO OHURO ONPU NO UTA HANA NO KIGENN POPPU NO RURETO DOREMI KEKKA AIKO KEKKA HAZUKI KEKKA ONPU KEKKA POPPU KEKKA SABISU GAME OVER SOUGOU HAZUKI NO ONETU HAZUKI NO KOORI 1P KIHON 2P KIHON 3P OKIGAE HENSINN
Sound Test
Controls:
Right/Left | Increment / Decrement ID |
Up/Down | Select entry |
Red Button | Play |
Key Test
Pressing a button turns the X marks into O marks. Hold all direction buttons to exit.
The Magical Doremi series
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Sega Pico | Ojamajo Doremi ♯ • Ojamajo Doremi Dokka~n! |
- Pages missing developer references
- Games developed by Fupac
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- Games published by Bandai
- Sega Pico games
- Pages missing date references
- Games released in 2000
- Games released in March
- Games with debugging functions
- Games with hidden sound tests
- Articles requiring elaboration
- Magical Doremi series
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Cleanup > Pages missing date references
Cleanup > Pages missing developer references
Cleanup > Pages missing publisher references
Games > Games by content > Games with debugging functions
Games > Games by content > Games with hidden sound tests
Games > Games by developer > Games developed by Fupac
Games > Games by platform > Sega Pico games
Games > Games by publisher > Games published by Bandai Namco > Games published by Bandai
Games > Games by release date > Games released in 2000
Games > Games by release date > Games released in March
Games > Games by series > Magical Doremi series