string ref charmap consts and field effect script macros

asm/charmap.s

@@ -252,5 +252,22 @@
 	.charmapconst PK, 0x53
 	.charmapconst PKMN, 0x53, 0x54
 	.charmapconst POKEBLOCK, 0x55, 0x56, 0x57, 0x58, 0x59
-	.charmapconst AQUA, 0xFD, 0x08
+
+; string refs
+	; unknown (0xFD, 0x00)
+	.charmapconst PLAYER,   0xFD, 0x01
+	.charmapconst STRVAR_1, 0xFD, 0x02
+	.charmapconst STRVAR_2, 0xFD, 0x03
+	.charmapconst STRVAR_3, 0xFD, 0x04
+	; unknown (0xFD, 0x05)
+	.charmapconst RIVAL,    0xFD, 0x06
+; version-dependent strings (originally made for Ruby/Sapphire differences)
+	.charmapconst VERSION,  0xFD, 0x07 ; "EMERALD"
+	.charmapconst AQUA,     0xFD, 0x08
+	.charmapconst MAGMA,    0xFD, 0x09
+	.charmapconst ARCHIE,   0xFD, 0x0A
+	.charmapconst MAXIE,    0xFD, 0x0B
+	.charmapconst KYOGRE,   0xFD, 0x0C
+	.charmapconst GROUDON,  0xFD, 0x0D
+
 	.charmapconst next, 0xFE

asm/macros.s

@@ -4,6 +4,7 @@
 	.include "asm/macros/pokemon_data.s"
 	.include "asm/macros/ec.s"
 	.include "asm/macros/map.s"
+	.include "asm/macros/field_effect_script.s"
 
 	.macro region_map_entry x, y, width, height, name
 	.byte \x

asm/macros/field_effect_script.s

@@ -0,0 +1,42 @@
+	.macro field_eff_loadtiles address
+	.byte 0
+	.4byte \address
+	.endm
+
+	.macro field_eff_loadfadedpal address
+	.byte 1
+	.4byte \address
+	.endm
+
+	.macro field_eff_loadpal address
+	.byte 2
+	.4byte \address
+	.endm
+
+	.macro field_eff_callnative address
+	.byte 3
+	.4byte \address
+	.endm
+
+	.macro field_eff_end
+	.byte 4
+	.endm
+
+	.macro field_eff_loadgfx_callnative tiles_address, palette_address, function_address
+	.byte 5
+	.4byte \tiles_address
+	.4byte \palette_address
+	.4byte \function_address
+	.endm
+
+	.macro field_eff_loadtiles_callnative tiles_address, function_address
+	.byte 6
+	.4byte \tiles_address
+	.4byte \function_address
+	.endm
+
+	.macro field_eff_loadfadedpal_callnative palette_address, function_address
+	.byte 7
+	.4byte \palette_address
+	.4byte \function_address
+	.endm