[WIP] MCU v2.0 firmware initialization documentation

// MCU v2.0 firmware bootup code documentation
// for hardware reg names/documentation, see
//http://courses.ee.sun.ac.za/Computer_Systems_245/Dokumentasie/RL78%20hardware%20manual%20(registers).pdf
[Select Register Bank 0]
SP = 0xFE00 (== 0xFFE00)
call 1AF:
    di
    CMC = 0x10
    CSC = 0x80
    OSMC = 1
    CKX = 8
    LVIS = 0
    LVIM = 0
ax = 0
b = 0xC0
while (b)
{
    b -= 2;
    *(0xFFE20+b) = ax // zero_out(0xFFE20, 0xC0); // Clear out stack?
}
es = 0
hl = 0x4F8C
de = 0xFD32
branch: 0xD6F.
--
ax = hl (4F8C)
while (ax != 0x4FC2)
{
    *(de) = a // (0x4F)
    hl++;
    de++;
    ax = hl
    // Set 0xFFD32-0xFFD66 to 0x4F [?]
}
hl = 0xF902
ax = 0xFD32
branch: d81
while (ax != hl)
{
    *(hl) = 0
    hl++;
    //zero_out(0xF902, 0x430);
}
hl = 0x4F81
de = 0xfd68
branch: d93
ax = hl;
while (ax != 0x4F81) { // does undocumented stuff } // This never runs...ax == 0x4F81
hl = 0xfd68;
ax = 0xfd68;
while (ax != hl) { // does undocumented stuff } // Again, weird while loop...nothing!
call 0xCE:
    hl = sp
    WDTE = 0xAC // Watchdog timer
    push hl
    hl = 0xF0
    cy = hl.7 // cy = 1
    pop hl
    if (cy)
        *(0xff924) |= 1
    a = RESF
    *(hl + 1) = a
    a =  *(hl + 1)
    a &= 0x10
    if (a) // Reset occurred due to Watchdog timer
        *(0xFFBDA) |= 2
        *(0xFF924) |= 1
    else
        a = *(hl + 1)
        a &= 0x80
        if (a) // Reset occurred due to illegal instruction
            *(0xFF924) |= 1
    a = *(0xFF924)
    if (!(a & 1))
        ax = 0
        ax--; // ax = 0xFFFF
        *hl = ax
        ax = 0
        while (ax != hl) // Wait loop?
            (*hl)--;
            ax = 0
    call 0x1C5: // reset_registers(), maybe?
        a = *0xFF924
        if (a & 1)
            P0 = 3
            P3 = 7
            P14 = 0
        else
            P0 = 0
            P3 = 6
            P14 = 0
        PM0 = 0xFF
        PM3 = 0xF0
        PM14 = 0xFC
        a = 0xFF924
        if (!(a & 1))
            *0xf0510 = 0
            P1 = 0xC0
            P2 = 0
            P4 = 8
            P5 = 0
            P6 = 0x0
            P7 = 0x40
            P12 = 0x0
            P15 = 0
            *F00F2 &= 0xFE
        ax = 0x00FF
        TT0 = ax
        ax = 0
        IF0 = ax
        IF1 = ax
        IF2 = ax
        MK0 = 0xFFFF
        MK1 = 0xFFFF
        MK2 = 0xFFFF
        *(0xF0511) = 0xFC
        PM1 = 0
        PM2 = 0xE9
        PM4 = 0xF3
        PM5 = 0xF2
        PM6 = 0xFC
        PM7 = 0x4F
        PM12 = 0xFF
        PM15 = 0xFF
        *(0xf0512) = 0x11
        PU0 = 0
        PU1 = 0
        PU3 = 0
        PU4 = 0
        PU5 = 2
        PU7 = 0x19
        PU12 = 0x0
        PU14 = 0x0
        *(0xf0043) = 0 // PIM3? What is this SFR
        *(0xf0047) = 0 // PIM7?
        *(0xF0053) = 6 // POM3?
        *(0xf0057) = 0 // POM6?
        PR00 = 0xFFFF
        PR01 = 0xFFFF
        PR10 = 0xFFFF
        PR11 = 0xFFFE
        PR02L = 0xFF
        PR12L = 0xFF
        EGP0 = 0x31 // External interrupt rising edge enable
        EGN0 = 0x60 // External interrupt falling edge enable
        *(0xf0538) = 0xA
        *(0xf0539) = 0x0
        KRM = 0
        PER0 &= 0xDF // ADCEN = 0, disables clock supply to A/D converter input, disables A/D SFRs
        ADM0 = 0 // Does this do anything? ADCEN just got disabled, so A/D is in reset mode...
        PER0 &= 0xFB // SAU0EN = 0, Disables Serial Array unit 0.
        x = 0x87 // a is 0, so ax == 0x0087
        SRC0 = ax // 0x87
        SRC1 = ax // 0x87
        SRC2 = ax // 0x87
        SRC3 = ax // 0x87
        PER0 &= 0xEF // ICA0EN = 0, disables clock supply to IICA0, disables IICA0 SFRs (I2C)
        // Given the trends, these must be the I2C registers:
        IICCTL00 = 0
        *(0xF0501) &= 0xFE
        *(0xF0550) = 0
        // DMA control register clearing
        DRC0 = 0
        DRC1 = 0
        // Clock output select clearing
        CKS0 = 0
        CKS1 = 0
    *(hl) = 0x0000
    // [NOT FINISHED DOCUMENTING YET]