Earthbound Intro.ccs upgrade to support setting flags before loading the map

IntroWithFlags.ccs

//The flyover sequence uses warps 150 and 151 by default
//Warp coordinates can be changed in teleport_destination_table.yml

//Flyover Text
Flyover1:
"[02 0C][01 32]The year is 199X[09][00]"

Flyover2:
"[02 0C][01 0C]Onett, a small town in Eagleland[09][00]"

Flyover3:
"[02 0C][01 3D][08 01]'s house[09][00]"

//Setup stuff
newgame_location (2112, 1768)        //Should be the same coordinates as flyover1mov
newgame_startup (Intro)


//These two commands control the coordinates of the first two flyovers, and the direction they move in
//For directions, 0 is north, 1 is northeast, 2 is east, etc.
flyover1mov (2112, 1768, 7)        //First two numbers should be the same coordinates as newgame_location
flyover2mov (2000, 1424, 1)        //First two numbers should be same as the coordinates of Warp 150, multiplied by 8

//This command controls the starting coordinates of the third flyover
flyover3start (2664, 888)        //Should be same as the coordinates of Warp 151, multiplied by 8

//This command controls the coordinates the third flyover will move to
flyover3mov (2664, 336)

//Intro string
Intro:
    hide_party
    gen_sprite (106, 476, 1)  //Activates first flyover
    call (0xc9b4b8)
    warp (150)                //Warps to initial coordinates of flyover 2
    gen_sprite (106, 477, 1)  //Activates first flyover
    call (0xc9b4b8)
    warp (151)                //Warps to initial coordinates of flyover 3
    gen_sprite (106, 478, 1)  //Activates first flyover
    call (0xc9b4b8)
    warp (0xC4)               //Warps to Ness's room
    show_party (1)
    eob

// IntroFlags will be called before entering the map,
// only when flg_IntroDone is clear.
define flg_IntroDone = 20
IntroFlags:
    set(flg_IntroDone) // Picky joined your party. Never unset
    set(flag 34)    // Post Starman Jr / Picky left party. Never unset
    set(flag 94)    // Seems to fix your mom
    unset(flag 95)  // Makes phones work (might already be unset)
    set(flag 98)    // Makes Ness's phone specifically work
    set(flag 100)   // King doesn't want to go outside
    set(flag 104)   // Pokey/Picky punished, first day events cleaned up
    unset(flag 107) // When on, primes sunrise transition exiting Pokey's house
    set(flag 199)   // Know how to call Ness's dad
    set(flag 200)   // Know how to call Ness's mom
    set(flag 209)   // Onett warp - necessary to have correct Mom text
    set(flag 375)   // Most Onett townsfolk
    set(flag 422)   // Onett daytime palette
    set(flag 469)   // Suppresses the day 1 townsfolk
    unset(flag 476) // Onett roadblocks
    unset(flag 477) // Ness head in his room
    set(flag 517)   // Ness's house's lights are on
    unset(flag 532) // No meteor sound in Ness' house
    unset(flag 533) // No meteor sound in Ness' room
    unset(flag 749) // No pajamas?
    unset(flag 11)  // Disable "peaceful mode"
    eob

///////////////////////////////////////////////////////////////////////////////
//// DON'T EDIT ANYTHING BELOW

//// New stuff relating to setting flags
// Change a text pointer that is always called after loading a
// save file but before loading the map.
_asmptr(0xC1FF1C, always_text_before_map)

always_text_before_map:
    // Unset flag indicating that you just slept in a hotel.
    // If this is set, it will play the Good Morning music,
    // and you won't be able to sleep in the hotel again (without leaving).
    unset(flag 383)
    // If flag 20 is clear, go to IntroFlags
    "[07 {short flg_IntroDone}][1B 02 {long IntroFlags}]"
    eob

//New commands

command e(label) "{long label}"
command gen_sprite (sprite, move, style) "[1F 15 {short sprite} {short move} {byte style}]"

command flyover1mov (x, y, direction) {
    ROM[0xC3ABEE] = "{short x}"
    ROM[0xC3ABF1] = "{short y}"
    ROM[0xC3AC06] = "{byte direction}"
}

command flyover2mov (x, y, direction) {
    ROM[0xC3AC28] = "{short x}"
    ROM[0xC3AC2B] = "{short y}"
    ROM[0xC3AC40] = "{byte direction}"
}

command flyover3start (x, y) {
    ROM[0xC3AC62] = "{short x}"
    ROM[0xC3AC65] = "{short y}"
}

command flyover3mov (x, y) {
    ROM[0xC3AC85] = "{short x}"
    ROM[0xC3AC89] = "{short y}"
}

//Rom Locations

ROM[0xC49EA4] = "[{e(Flyover1)}]"
ROM[0xC49EA8] = "[{e(Flyover2)}]"
ROM[0xC49EAC] = "[{e(Flyover3)}]"