general:guides:hxd_guide
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| general:guides:hxd_guide [2024/10/18 22:01] – felixwright | general:guides:hxd_guide [2024/10/18 22:28] (current) – [Downloading HxD] felixwright | ||
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| ===== Downloading HxD ===== | ===== Downloading HxD ===== | ||
| - | HxD 2.0 RC can be downloaded from mh-nexus. | + | HxD 2.0 RC can be [[https:// |
| What is Hexadecimal? | What is Hexadecimal? | ||
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| More examples: | More examples: | ||
| - | DECIMAL | + | |
| - | + | HEX = 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F | |
| - | HEX = 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F | + | |
| There are many online resources for converting hex to decimal, but in this tutorial I will explain how to convert hex to decimal and decimal to hex using windows calculator. Before we begin, run calc.exe and press Alt + 3. This will put the calculator in programming mode. | There are many online resources for converting hex to decimal, but in this tutorial I will explain how to convert hex to decimal and decimal to hex using windows calculator. Before we begin, run calc.exe and press Alt + 3. This will put the calculator in programming mode. | ||
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| Before we get into hex editing you should learn keyboard shortcuts. For ROMHacking, here's what you will need to know: | Before we get into hex editing you should learn keyboard shortcuts. For ROMHacking, here's what you will need to know: | ||
| ^ Key Combination ^ Description ^ | ^ Key Combination ^ Description ^ | ||
| - | |F3 | Find Again | + | |F3 | Find Again | |
| - | |F6 | Next Difference (File Compare) | + | |F6 | Next Difference (File Compare) |
| - | |Delete | Clear Selection (Note: This shortens filesize!) | + | |Delete | Clear Selection (Note: This shortens filesize!) |
| - | |CTRL + A | Select All | + | |CTRL + A | Select All | |
| - | |CTRL + E | Select Block… | + | |CTRL + E | Select Block… |
| - | |CTRL + G | Go To… | + | |CTRL + G | Go To… | |
| - | |CTRL + K | File Compare… | + | |CTRL + K | File Compare… |
| - | |CTRL + N | New file (Empty) | + | |CTRL + N | New file (Empty) |
| - | |CTRL + C | Copy Selection | + | |CTRL + C | Copy Selection |
| - | |CTRL + X | Cut Selection | + | |CTRL + X | Cut Selection |
| - | |CTRL + V | Paste Insert (Note: This increases filesize!) | + | |CTRL + V | Paste Insert (Note: This increases filesize!) |
| - | |CTRL + B | Paste Write (Overwrite) | + | |CTRL + B | Paste Write (Overwrite) |
| - | |CTRL + Z | Undo | + | |CTRL + Z | Undo | |
| - | |CTRL + Y | Redo | + | |CTRL + Y | Redo | |
| - | |CTRL + O | Open a file… | + | |CTRL + O | Open a file… |
| - | |CTRL + R | Find & Replace… | + | |CTRL + R | Find & Replace… |
| - | |CTRL + S | Save a file | + | |CTRL + S | Save a file | |
| - | |Shift + F3 | Find Again (Reverse) | + | |Shift + F3 | Find Again (Reverse) |
| - | |Shift + F6 | Previous Difference (File Compare) | + | |Shift + F6 | Previous Difference (File Compare) |
| - | |Ctrl + F4/Ctrl + W | Close file | + | |Ctrl + F4/Ctrl + W | Close file | |
| - | |Ctrl+Number (0-9) | Goto bookmark | + | |Ctrl+Number (0-9) | Goto bookmark |
| - | |Ctrl+Shift+Number (0-9) | Add bookmark | + | |Ctrl+Shift+Number (0-9) | Add bookmark |
| - | |Left and Right Arrow keys | Move to next/ | + | |Left and Right Arrow keys | Move to next/ |
| - | |Up and Down Arrow keys | Move to next/ | + | |Up and Down Arrow keys | Move to next/ |
| - | |Shift + Up/Shift + Down | Select next/ | + | |Shift + Up/Shift + Down | Select next/ |
| - | |Shift + Left/Shift + Right | Select next/ | + | |Shift + Left/Shift + Right | Select next/ |
| WARNING: Changes in filesize could destroy your ROM if you're not careful! | WARNING: Changes in filesize could destroy your ROM if you're not careful! | ||
| - | Going to an offset | + | |
| + | ===== Going to an offset | ||
| Going forward, Let's say you want to disable the low energy alarm in Zero Mission. 0x52888 = 1D 2F to 14 E0 | Going forward, Let's say you want to disable the low energy alarm in Zero Mission. 0x52888 = 1D 2F to 14 E0 | ||
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| As you can see, by default HxD assumes you want to put in a hex address, and the address above is hex so that is fine. If you run into a decimal or octal address though, you can select the dec or oct bubbles and then paste in the address. | As you can see, by default HxD assumes you want to put in a hex address, and the address above is hex so that is fine. If you run into a decimal or octal address though, you can select the dec or oct bubbles and then paste in the address. | ||
| - | Editing Hex Values | + | ===== Editing Hex Values |
| So we're at address 0x52888. The text cursor should be blinking to the left of 1D. Select 1D, and type 14. Your cursor should now be blinking to the left of 2F. Select 2F, and replace it with E0. Save your changes with Ctrl + S. You have just performed a hex tweak! Open your ROM in an emulator, and reduce samus' energy below 30. There should no longer be a low energy alarm. | So we're at address 0x52888. The text cursor should be blinking to the left of 1D. Select 1D, and type 14. Your cursor should now be blinking to the left of 2F. Select 2F, and replace it with E0. Save your changes with Ctrl + S. You have just performed a hex tweak! Open your ROM in an emulator, and reduce samus' energy below 30. There should no longer be a low energy alarm. | ||
| - | PC vs SNES addresses | + | ===== PC vs SNES addresses |
| SNES roms are divided into banks, which are $8000 bytes long (32,768 bytes in decimal). Super Metroid is of the rom type LoROM, so it can address banks from bank $80-$FF. Because HxD uses PC addresses, and the majority of documentation for SNES games is written with SNES addresses, it's important to know the distinction between the two. PC addresses start at $000000, while SNES addresses start at $80:8000. Every SNES bank starts at $XX:8000, where XX is the bank number. The game reads addresses in this LoROM format. In a LoROM address, the bank is number separated by a colon. | SNES roms are divided into banks, which are $8000 bytes long (32,768 bytes in decimal). Super Metroid is of the rom type LoROM, so it can address banks from bank $80-$FF. Because HxD uses PC addresses, and the majority of documentation for SNES games is written with SNES addresses, it's important to know the distinction between the two. PC addresses start at $000000, while SNES addresses start at $80:8000. Every SNES bank starts at $XX:8000, where XX is the bank number. The game reads addresses in this LoROM format. In a LoROM address, the bank is number separated by a colon. | ||
| Examples: | Examples: | ||
| - | PC address | + | |
| - | $4000 $80:C000 | + | ^ PC address |
| - | $9500 $81:0500 | + | | $4000 |
| - | $791F8 | + | | $9500 |
| - | $7FFFF | + | | $791F8 |
| + | | $7FFFF | ||
| Looking at the LoROM addresses, we can see these addresses are referring to locations in banks 80, 81, 8F, and 8F (again), respectively. | Looking at the LoROM addresses, we can see these addresses are referring to locations in banks 80, 81, 8F, and 8F (again), respectively. | ||
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| From the SMMM: | From the SMMM: | ||
| + | < | ||
| Bank $## LoROM address | Bank $## LoROM address | ||
| --------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- | ||
| Line 256: | Line 259: | ||
| Bank $FE $FE: | Bank $FE $FE: | ||
| Bank $FF $FF: | Bank $FF $FF: | ||
| - | + | </ | |
general/guides/hxd_guide.1729288866.txt.gz · Last modified: 2024/10/18 22:01 by felixwright