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- Seen Apr 22, 2024
Hi!
In these days i developed a variant of prime's DNS:
Each filter follows the same format of GBA palettes:
[0] - [5 bit blue] - [5 bit green] - [5 red bit]
The first bit is unused, while the remaining fields occupy 5 bits.
In each field, you must specify how much blue/green/red subtract from the palette.
For example, to get a blue-tinted filter, you have to subtract red and green:
[0] - [0] - [8] - [8] -> [0] - [01000] - [01000] - [01000] -> 0x2108
I used these filters:
In this specific case, there are 40 filters.
This number is obtained from the following formula: ((hours * 3600) + (minutes * 60) / 2160) = [0-39]
To increase the number of filters, replace the red highlighted part of the code with:
LDR R1, = VAL, where instead of VAL will be entered the denominator of the previous division, in my case 2160.
For example, to use 144 filters, you must be raplce VAL with 600 -> (24 hours * 3600) / 600 = 144.
In the last part of the routine, where the various offsets are marked, one is highlighted in blue and corresponds to the table where the filters are placed.
You can change it the offset where filters will insert.
To insert it we must go to 0x98 bytes later than the offset of the original DNS routine, and then overwrite the bytes with 00 4E 30 47 XX XX XX 08, where XX will be raplced by the offset of the new routine in little endian + 1.
Here's a little video to show the end result:
In these days i developed a variant of prime's DNS:
Spoiler:
Each filter follows the same format of GBA palettes:
[0] - [5 bit blue] - [5 bit green] - [5 red bit]
The first bit is unused, while the remaining fields occupy 5 bits.
In each field, you must specify how much blue/green/red subtract from the palette.
For example, to get a blue-tinted filter, you have to subtract red and green:
[0] - [0] - [8] - [8] -> [0] - [01000] - [01000] - [01000] -> 0x2108
I used these filters:
Spoiler:
In this specific case, there are 40 filters.
This number is obtained from the following formula: ((hours * 3600) + (minutes * 60) / 2160) = [0-39]
To increase the number of filters, replace the red highlighted part of the code with:
LDR R1, = VAL, where instead of VAL will be entered the denominator of the previous division, in my case 2160.
For example, to use 144 filters, you must be raplce VAL with 600 -> (24 hours * 3600) / 600 = 144.
In the last part of the routine, where the various offsets are marked, one is highlighted in blue and corresponds to the table where the filters are placed.
You can change it the offset where filters will insert.
To insert it we must go to 0x98 bytes later than the offset of the original DNS routine, and then overwrite the bytes with 00 4E 30 47 XX XX XX 08, where XX will be raplced by the offset of the new routine in little endian + 1.
Here's a little video to show the end result:
