En Mag - Revision history

Charles445: /* Overlay */ Adding title screen text color information for NTSC 1.0 and Debug

2019-01-05T05:51:15Z

‎Overlay: Adding title screen text color information for NTSC 1.0 and Debug

Mzxrules: Mzxrules moved page Ovl En Mag to En Mag

2017-08-21T04:54:30Z

Mzxrules moved page Ovl En Mag to En Mag

Mzxrules: /* Instance Variables */

2017-06-27T20:55:51Z

‎Instance Variables

Mzxrules at 00:36, 7 November 2016

2016-11-07T00:36:55Z

Mzxrules: /* NTSC 1.0 */

2015-06-11T10:50:50Z

‎NTSC 1.0

Mzxrules at 03:32, 19 February 2015

2015-02-19T03:32:06Z

Mzxrules: Created page with "{{actor|name=ovl_En_Mag}} '''ovl_En_Mag''' is the actor that displays the Title Screen logo. When ovl_En_Mag is loaded, pressing D-Up, D-Down, D-Left, D-Right, Start, B,..."

2015-02-18T01:16:43Z

Created page with "{{actor|name=ovl_En_Mag}} '''ovl_En_Mag''' is the actor that displays the Title Screen logo. When ovl_En_Mag is loaded, pressing D-Up, D-Down, D-Left, D-Right, Start, B,..."

New page

{{actor|name=ovl_En_Mag}}

'''ovl_En_Mag''' is the actor that displays the [[Title Screen]] logo.

When ovl_En_Mag is loaded, pressing D-Up, D-Down, D-Left, D-Right, Start, B, C-Down, L, C-Right, C-Left, A, C-Up, R, Z on controller 3 resets the save data. This can be used to delete save data that cannot be deleted through the file select menu.

{{clear}}

== NTSC 1.0 ==
=== Save Reset Code Routine ===
In this section of notes, the loaded overlay file is located at 801EF370 in ram, and instruction addresses within the overlay file are abbreviated to the rightmost four digits (except for branches). The actor instance is located at 801F42B0, with ram addresses abbreviated to the rightmost six digits.
<pre>
F7DC LHU A2, 0044 (A0) Load controller 3 button input (buttons)
F7E4 LW T6, 630C (A3) Load previous controller 3 input (buttons)
F7E8 ANDI A2, A2, 0xFF3F (bitwise and)

F7F0 BNE A2, T6, 801EF830 (branch if new input is different)
F7F4 ADDIU T2, R0, 0x0010 (T2 = 0x10) (perhaps frames until next input?)
F830 SW T2, 0x6311 (AT) (2025C0 = 0x00000010, writes timer to press next input)
F834 SW A2, 0x630D (AT) (2025BC = 3rd controller button input)
F838 LH V1, 0x6306 (A3) (2025B6) (Load index to next input checked)

F844 SLTI AT, V1, 0x0004
F848 BEQ AT, R0, 801EF890 (branch if past first dpad input)
F84C SLL T7, V1, 0x2 (T7 has offset to next input checked)

things happen

F858 LW T4, 0x20C4(T4) (T4 = 801F20C4 + V1*4)
F864 AND T5, T4, A2 (T4 = 800 in this pass)
F868 BEQ T5, R0, 801EF87C (branch if T5 != 0x0800)

F870 SH T6, 0x6307 (AT) (2025B6 = T6)
??

INPUT CHAIN >= 4
F890 ADDU V0, V0, T7 (start building input check chain?)
F894 LW V0, 0x20C4 (V0) = Load next input check
F898 LHU T8, 0x0050 (A0) = Load input (from just pressed address)
F89C ADDIU T0, V1, 0x0001 (increment input counter, store in T0)
F8A4 AND T9, T8, V0 = Check input, store result T9
F8A8 BNE T9, V0, 801EF8BC (branch on mismatch)
F8B4 BEQ 801EF8CC
F8B8 LH V1, 0x6306 (A3) Load input chain index

F8CC ADDIU AT, R0, 0x000E (Load input chain index for next branch)
F8D0 BNEL V1, AT, 801EF8F0 (Branch if INPUT CHAIN < 0xE)
F8D4 LW RA, 0x0014 (SP) (SKIPPED)

JAL
F370 ADDIU SP, SP, 0xFFE0 (protect stack)
</pre>

@@ Line 12: / Line 12: @@
 {|class="wikitable"
 ! Offset || Type || Description
 |-
 | 2D50 || s32 || Save reset code input length
@@ Line 67: / Line 83: @@
 F370 ADDIU	SP, SP, 0xFFE0 (protect stack)
 </pre>
 == Instance Variables ==

@@ Line 79: / Line 79: @@
 | E310 || u32 || Stores the number of cycles left to input the next button in sequence, before the combo fails. Set to 0x10 for every successful input
 |}
 [[Category:Title Screen]]

@@ Line 21: / Line 21: @@
 | 2DA4 || char[0x0A] || "PRESSSTART" in the file name character set
 |-
-| 2DB0 || u32[9] || [[Bank Offset|Bank offsets]] to Title Logo's flame mask
+| 2DB0 || u32[9] || [[Segment offset]] array to Title Logo's 9 flame mask images
 |}
 ==== Save Reset Code Routine ====

@@ Line 13: / Line 13: @@
 ! Offset || Type || Description
 |-
-| 2D54 || u32[0x0E?] || Input Sequence for the save reset code
+| 2D50 || s32 || Save reset code input length
 |}
 ==== Save Reset Code Routine ====

← Older revision	Revision as of 04:54, 21 August 2017
(No difference)

@@ Line 7: / Line 7: @@
 {{clear}}
-== NTSC 1.0 ==
+== Overlay ==
-=== Save Reset Code Routine ===
+=== NTSC 1.0 ===
 In this section of notes, the loaded overlay file is located at 801EF370 in ram, and instruction addresses within the overlay file are abbreviated to the rightmost four digits (except for branches). The actor instance is located at 801F42B0, with ram addresses abbreviated to the rightmost six digits.
 <pre>
@@ Line 52: / Line 59: @@
 F370 ADDIU	SP, SP, 0xFFE0 (protect stack)
 </pre>