Mez's Codes...

[Tony H]

Have never heard of the A0/A1 code types before. I assume they are still 8 and 16 bit writes?

[nolberto82]

Mez the bypass master.

[Mezmorize]

Have never heard of the A0/A1 code types before. I assume they are still 8 and 16 bit writes?

Yeah, they are 'uncached' address writes.
I never had to use them until lately. I'm testing all codes on real hardware and just randomly trying them out when other code types didn't work, solved the problem.

Mez the bypass master.

[lee4]

(A) codetype
is use to inject code in unprotected memory at before/boot of game
never ment to use as normal code usage

(8) codetype
inject code in user memory at during of game
is ment to use as normal code usage

[Mezmorize]

Diddy Kong Racing (U) (Rev A) [N64]
Can Enter Races With Zero Balloons
8103C118 2400

[Mezmorize]

Mischief Makers (USA) (Rev A) [N64]
Infinite Health
81057458 2400

Stage Select Menu (Press Z+B+A)
D00BE538 00E0
800BE4F1 0004

[Mezmorize]

Resident Evil 2 (U) (Rev A) [N64]
Infinite Health
81059E28 2400

Can Save Without Having Ink Ribbons
8108C53C 1000

Leon Starts A New Game With ?? Instead Of Handgun
8012BD90 00??
01:Knife
03 - Different Handgun [Normally not equipped by Leon]
04:Custom Handgun
05:Magnum
06:Custom Magnum
07:Shotgun
08:Custom Shotgun
09:Grenade Launcher [Normally not equipped by Leon]
0A:Grenade Launcher (Flame Rounds) [Normally not equipped by Leon]
0B:Grenade Launcher (Acid Rounds) [Normally not equipped by Leon]
0C:Bowgun [Normally not equipped by Leon]
0D:Colt S.A.A.
0E:Spark Shot [Normally not equipped by Leon]
0F:Sub Machine Gun
10:Flamethrower
11:Rocket Launcher
12:Gatling Gun
Note: Also weapons that normally take two inventory spots, only consume one.

Claire Starts A New Game With ?? Instead Of Handgun
8012BDB1 00??
01:Knife
02:Handgun [Normally not equipped by Claire]
04:Custom Handgun [Normally not equipped by Claire]
05:Magnum [Normally not equipped by Claire]
06:Custom Magnum [Normally not equipped by Claire]
07:Shotgun [Normally not equipped by Claire]
08:Custom Shotgun [Normally not equipped by Claire]
09:Grenade Launcher
0A:Grenade Launcher (Flame Rounds)
0B:Grenade Launcher (Acid Rounds)
0C:Bowgun
0D:Colt S.A.A.
0E:Spark Shot
0F:Sub Machine Gun [Normally not equipped by Claire]
10:Flamethrower [Normally not equipped by Claire]
11:Rocket Launcher
12:Gatling Gun
Note: Also weapons that normally take two inventory spots, only consume one.

Leon Starts A New Game With ?? Instead Of Knife
8012BD93 00??
01:Knife
02:Handgun
03:Handgun Different
04:Custom Handgun
05:Magnum
06:Custom Magnum
07:Shotgun
08:Custom Shotgun
09:Grenade Launcher
0A:Grenade Launcher (Flame Rounds)
0B:Grenade Launcher (Acid Rounds)
0C:Bowgun
0D:Colt S.A.A.
0E:Spark Shot
0F:Sub Machine Gun
10:Flamethrower
11:Rocket Launcher
12:Gatling Gun
13:Machine Gun
14:Handgun Bullets
15:Shotgun Shells
16:Magnum Bullets
17:Fuel
18:Grenade Rounds
19:Flame Rounds
1A:Acid Rounds
1B:Machine Gun Bullets
1C:S. Shot Bullets
1D:Bow Gun Bolts
1E:Ink Ribbon
1F:Small Key
20:Hand Gun Parts
21:Magnum Parts
22:Shotgun Parts
23:First Aid Spray
24:Chemical FR-W09
25:Chemical AC-W24
26:Green Herb
27:Red Herb
28:Blue Herb
29:Mixed Herb (Green)
2A:Mixed Herb (Red&Green)
2B:Mixed Herb (Blue&Green)
2C:Mixed Herb (?)
2D:Mixed Herb (?)
2E:Mixed Herb (?)
2F:Lighter
30:Lock Pick
31:Picture
32:Valve Handle
33:Red Jewel
34:Red Card Key
35:Blue Card Key
36:Serpent Stone
37:Jaguar Stone
38:Blue Stone
39:Blue Stone (?)
3A:Eagle Stone
3B:Bishop Plug
3C:Rook Plug
3D:Knight Plug
3E:King Plug
3F:W. Box Key
40 - Detonator
41:Plastic Bomb
42:Bomb & Detonator
43:Crank
44:Film
45:Film (?)
46:Film (?)
47:Unicorn Medal
48:Eagle Medal
49:Wolf Medal
4A:G. Cogwheel
4B:Manhole Opener
4C:Main Fuse
4D:Fuse Case
4E:Vaccine
4F:Vaccine Cart.
50:Film
51:Base Vaccine
52:G-Virus
53:Special Key
54:Joint S Plug
55:Joint N Plug
56:Cord
57:Film
58:Cabin Key
59:Precinct Key (blue)
5A:Precinct Key (red)
5B:Precinct Key (?)
5C:Precinct Key (green)
5D:C. Panel Key (red)
5E:C. Panel Key (yellow)
5F:P. Room Key
60:MO Disk
61:Lab Card Key
62:Master Key
63:Platform Key
64:No Item
65:No Item
66:No Item
67:No Item
68:Chris's Diary
69:Mail to Chris
6A:Memo to Leon
6B:Police Memorandum
6C:Operation Report 1
6D:Mail to the Chief
6E:Mail to the Chief (?)
6F:Secretary's Diary A
70:Secretary's Diary B
71:Operation Report 2
72:User Registration
73:Film A
74:Film B
75:Film C
76:Patrol Report
77:Watchman's Diary
78:Chief's Diary
79:Sewer Manager Diary
7A:Sewer Manager Fax
7B:Film D
7C:Vaccine Synthesis
7D:Lab Security Manual
7E:P-Epsilon Report
7F:Rookie Files
80:Rookie Files (?)
81:No Item
82:Spade Key
83 - Diamond Key
84 - Desk Key
85:Heart Key
86:Club Key
87:Virgin Heart
88:Square Crank
89 - Down Key
8A:Up Key
8B:Locker Key

Claire Starts A New Game With ?? Instead Of Knife
8012BDB4 00??
??=See above ^

Item Amount Doesn't Decrease After Combining
8108E968 2400
Note: Tested with Hand Gun Bullets in slot 3 and in slot 4, combined with the handgun (in slot 1); works on both characters.

Have 2 Extra Inventory Slots Open
8108B904 2400

Infinite Health Cheat Enabled (RAM)
8010DC37 0001

Infinite Health Cheat Enabled (ASM)
810559C4 2400

[MasterGrand]

Hello Mezmorize, Do you have any tips or guides for Enable/Disable Code by L1 L2 or R1 R2..etc

Example Infinite HP I want enable it or disable anytime I want. by R1 L1 R2 L2 Cross..etc

Thank you advance

[Mezmorize]

Hello Mezmorize, Do you have any tips or guides for Enable/Disable Code by L1 L2 or R1 R2..etc

Example Infinite HP I want enable it or disable anytime I want. by R1 L1 R2 L2 Cross..etc

Thank you advance

Are you talking about PS1 or another Sony system?
I have not made any codes past PS1.

https://www.bsfree.org/hack/hacking_psx.html likely has what you're looking for.
An example may look like this:
D0ABCDEE 0010 <-If this button is pressed
8100000E 0001 <-Code is turned on
D0ABCDEE 0020 <If this button is pressed instead
8100000E 0000 <-Code is turned off

---------------------

Resident Evil 2 (U) (Rev A)
One Hit Kills Most Enemies
8105B2DA 1111

Have been playing tonight testing codes for Resident Evil 2 but haven't made it to a boss yet to see how the One Hit Kills would affect bosses that you fight multiple times (although I don't see it having any issues).

One thing I discovered with the code I made where you can save without Ink Ribbons, it affects tons of other items too :-)
Like if you walk up to a door that normally needs a certain key, the game thinks you have the key even when you don't and unlocks the door.
Basically affects all items that needs to be in your inventory.

Items that it does not affect are ones that you have to manually click on "use" in the inventory screen, such as film or the 'cord' item to fix the broken electric panel to close the window shutters.
More examples of items the code will not work for (because you have to manually select USE): Valve Handle, Lighter etc.

Examples of items that the code works for: Key Card, Prescient Key, special key, Ink Ribbon etc.

Also noticed a bit of a bug with one of the other codes, but it's a really simple fix.
Have 2 Extra Inventory Slots Open
Turn on the code, and save your game. Load up your saved game with the code disabled.

[Mezmorize]

Resident Evil 2 (U) (Rev A) [N64]

Hit Anywhere (Bullets)
8105AEAC 2400

One Hit Kills [Vast improvement over the previous code I had made]
8105B2F4 2400
Note: Sometimes zombies play dead on the ground still, and will need another shot.

Leon Can Open Desks Without The Small Key
810746F8 2400

Alternative Character Modifier
800E1138 000?
Note: Have to 'load' a new zone for the character to update if you change the value.
Can make some strange looking characters with this version of the code.
For instance, I was Sherry then switched to Leon and he had the short character graphics.
Also, I don't think this code has the same problem of the game crashing depending on if the character can normally use the equipped weapon or not.

And here's a few more codes, that are useless and will not be on the database:
Pick Up An Item To Instead Open The Item Box
80073EC3 0001

Item Amounts Are Not Shown
81095CF0 1000

Item Amounts Shows As Percentages
81095CDC 2400

Clicking On USE Equips The Item
8108DF30 2400

Weapon Amount Shows Up As Percentages
81095D84 2400

No Backgrounds
8109AB58 2400
Note: This would have been a pretty cool code. It removes all backgrounds and only shows items that move (like you and items you can pickup).
Would have been a cool code to toggle on/of to show the location of items.
Works good in an emulator but on real hardware not so much, therefore pretty useless.

[lee4]

Awesome RE2 N64 codes

[Mezmorize]

Thank you Sir.
This was one of my favorite games of the era, although I never played the N64 version until now.

I just (re)noticed a problem that I'll try to address though.
Thought it was the code that adds the two extra inventory slots causing the issue, that's why I added a note to the code saying to save the game and disable the code.
But I think I figured it out.

The code "Use Items Without Having Them" must be the one causing items to disappear from inventory, and after thinking about it; it makes since why.
Like when you start a new game, you get the key card from the dying police officer, then you use that item on the computer to unlock the doors.

After you use the item it is gone from your inventory.
Well, if you use the code I made, and access the computer without actually having the key card yet, the game does what it always does and removes an item from your inventory.
I'll try to make a code that disables items being taken away after use, or just add some notes to the code.

[Mezmorize]

Some more codes for one of my favorites for the N64.
Not the easiest game in the world to hack as the RAM addresses are always changing.

Diddy Kong Racing (U) (Rev A) [N64]

Infinite Blue Balloons Upon Pickup
810564EC 2400

Infinite Item Usage
81056958 2400
Note: Get one powerup balloon and wreak havoc on the other players ^.^

Two Powerups Needed For Max (Instead Of 3)
8003E39F 0002

Powered Up Balloons
8103E3A8 2400
Note: Once you powerup a weapon/turbo, the next time you get a balloon it keeps the same level of powerup.

Powered Up Balloons v2
8103E37C 2400
8103E38C 2400
Note: Getting a balloon will automatically start you with a powered up version of it, and you keep the same level of powerup (or greater) after use/pickup of another.

Mix'n Match Powerups
8103E37C 2400
Note: For example, you can get a red balloon, then a blue baloon and if you get another red balloon it's fully powered up instead of resetting to non-powered up version.

Red Balloons Give Blue Balloon Powerup Instead
8103E370 2400

Red Balloons Give ? Modifier
801F24B2 000?
Note: The powerup icon will show the default item usually given.
0:Heat Seeking Missile
1:Rocket
2:Land Mine
3:Oil Slick
4:Blue Balloon Effect

Disable Horn Sound Effect:
81056174 1000

Can't Get Balloons
810561C0 2400

[Mezmorize]

Diddy Kong Racing (U) (Rev A) [N64]

All Magic Codes Unlocked (RAM)
810E031C FFFF
810E031E FFFF
Note - This also unlocks the disabled passwords:
Control T.T. (Unlocks T.T.)
Control Drumstick (Unlocks Drumstick)
Mirrored tracks (All the tracks are mirrored)
High speed racing (Your acceleration is at max)
Print coords (Your X, Y, Z axis are displayed on-screen)

Click "Clear All Codes" To Instead Unlock All Codes
8108A6D0 8C99
8008A6D3 000C

[Mezmorize]

Diddy Kong Racing (U) (Rev A) [N64]
Get First Gold Balloon In The Game To Have ??
8003B6AF 00??
??=02-63
Note: This code has a hilarious side effect where all racer's heads spins around in circles like the exorcist.

-----

Star Fox 64 (U) (Rev A)
One Hit Kills Bosses (RAM)
8016F175 00FF

One Hit Kills Bosses (ASM)
80038E43 00FF
Note: You still have to take down the enemy shields before you can damage them.