race mini

$192b = map width
$1931 = map tile base
$1933 = map tile location hi
$1934 = map tile location of current UL tile
$195c = map data pointer lo/mid (hi = $02)

// Clear map metadata
void fun_021564() {
    uint8_192b = 0; // map width
    int8_192c = 0;
    uint16_1931 = 0;
    uint8_1933 = 0; // map location hi
    int16_1936 = 0;
    int16_1938 = 0;
    sint16_193a = -10;
    sint16_193c = -10;
}

// Set up map metadata
void fun_02158d(uint8 width, int8 b, uint24 x) {
    uint8_192b = width;
    int8_192c = b;
    uint24_1931 = x;

    uint16_192d = width * 8 - 96;
    uint16_192f = b * 8 - 64;
    uint16_1942 = uint16_192f - 32;
}

// Draw map/preview
void fun_02162f() {
    unit16 map_remainder;
    uint24 *map, *screen;
    if (!uint24_1931) {
        return;
    }
    map = (uint8_1933 << 16) | uint16_1934;
    screen = TILEMAP;

    // uint8_192b = map width
    map_remainder = uint8_192b - 12;

    for(int y = 9; y; --y) {
        for (int x = 0; x < 12; ++x) {
            *screen = *map;
            ++map;
            ++screen;
        }
        *screen = *map;
        screen += 4;
        map += map_remainder;
    }
}

// Calculate map position from map base
void fun_0215d8() {
    int16_1940 = int16_1938 >> 3; // intdiv 8
    int16_193e = uint8_192b * int16_1940 + int16_1936 >> 3;
    // Set to upper left tile in map data
    uint16_1934 = int16_193e + uint_1931;
    int8_1633 = int8_1936 & 7;
    int8_1632 = int8_1938 & 7;
}

void fun_017a2c(uint8 *x) {
    uint16 tmp = (uint16)(x + 11)
    tmp = max(0, tmp - uint16_1942, uint16_192d);
    uint16_1936 = tmp;
    uint16_193a = tmp - 16;

    tmp = (uint16)(x + 14);
    tmp = max(0, tmp - 0x25, uint16_192f);
    uint16_1938 = tmp;
    uint16_193c = tmp - 16;
}

loader: $023ea8

metadata format:

00~02: tile gfx base (TILEMAP)
03~05: base tile map data
- x for fun_02158d
- translated to current map tile location in fun_0215d8
06: width
- a for fun_02158d
07: height (extending downward)
- b for fun_02158d
08:
- written into int8_195e
09: goal x position (crossing from any y counts as a lap)
- written into int16_195f (0-padded)
- read every frame
- setting this too low causes the opponent to spawn much further into the level (wrapping issue?)
0a: starting y offset for all players (and hoppip), in pixels
- read in fun_011d1d, written to [[$18b7] + $0e]
- that's then read in fun_017a2c, combined with the byte after it as int16_167c (for second map? also was 0), and used to calculate uint16_1938 and uint16_193c
0b: ???
- read in fun_022ee3 at $022f16, written to uint8_197c
- that's then read in fun_011e9c and modified and written to [[$18bb] + $1a] and passes wholesale to fun_0118a8
- fun_0118a8(a) uses it as a lookup of uint16 ba = [$0118b2 + a * 2], and writes ba to [[$18bb] + $02]
- fun_011943 reads and tests the value for a guaranteed jump ? weird code section
0c~0e: sprite base
0f~11: preview tile gfx base (TILEMAP)
12~14: preview tile map base
15: preview map width
16: preview map height

first map

00 90 05 00 08 06 8c 10  07 18 67 04 00 90 04 40
4b 03 40 58 03 20 08

preview tile data = $035840
preview map width = 32
map location = $060cdf (starting) $060800 (base)
map width = 140
map metadata location = $0240dd

second map

00 95 05 c0 10 06 8c 10  08 18 57 03 00 60 04 40
4b 03 40 59 03 20 08

preview tile data = $035940
preview map width = 32
map location = $ (starting) $0610c0 (base)
map width = 140
map metadata location = $0240f4

logicplace/racemini_maps.md

race mini

first map

second map