pokecrystal/home/header.asm

; rst vectors (called through the rst instruction)

SECTION "rst0", ROM0[$0000]
	di
	jp Start

SECTION "rst8", ROM0[$0008]
FarCall::
	jp FarCall_hl

SECTION "rst10", ROM0[$0010]
Bankswitch::
	ldh [hROMBank], a
	ld [MBC3RomBank], a
	ret

SECTION "rst18", ROM0[$0018]
	rst $38

SECTION "rst20", ROM0[$0020]
	rst $38

SECTION "rst28", ROM0[$0028]
JumpTable::
	push de
	ld e, a
	ld d, 0
	add hl, de
	add hl, de
	ld a, [hli]
	ld h, [hl]
; SECTION "rst30", ROM0[$0030]
	ld l, a
	pop de
	jp hl

SECTION "rst38", ROM0[$0038]
	rst $38


; Game Boy hardware interrupts

SECTION "vblank", ROM0[$0040]
	jp VBlank

SECTION "lcd", ROM0[$0048]
	jp LCD

SECTION "timer", ROM0[$0050]
	jp Timer

SECTION "serial", ROM0[$0058]
	jp Serial

SECTION "joypad", ROM0[$0060]
	jp Joypad


SECTION "Header", ROM0[$0100]

Start::
; Nintendo requires all Game Boy ROMs to begin with a nop ($00) and a jp ($C3)
; to the starting address.
	nop
	jp _Start

; The Game Boy cartridge header data is patched over by rgbfix.
; This makes sure it doesn't get used for anything else.

	ds $0150 - @, $00
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`; rst vectors (called through the rst instruction)`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "rst0", ROM0[$0000]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`di`
			`jp Start`

Upgrade to rgbds 0.4.0 - fail for rgbds < 0.4.0 - `rst <Label>` - `ds <count>, <byte>` - `shift <N>` - ASCII "\r" - Sorted .sym file 2020-04-04 18:42:31 +00:00			`SECTION "rst8", ROM0[$0008]`
			`FarCall::`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`jp FarCall_hl`

Upgrade to rgbds 0.4.0 - fail for rgbds < 0.4.0 - `rst <Label>` - `ds <count>, <byte>` - `shift <N>` - ASCII "\r" - Sorted .sym file 2020-04-04 18:42:31 +00:00			`SECTION "rst10", ROM0[$0010]`
			`Bankswitch::`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`ldh [hROMBank], a`
			`ld [MBC3RomBank], a`
			`ret`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "rst18", ROM0[$0018]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`rst $38`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "rst20", ROM0[$0020]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`rst $38`

Upgrade to rgbds 0.4.0 - fail for rgbds < 0.4.0 - `rst <Label>` - `ds <count>, <byte>` - `shift <N>` - ASCII "\r" - Sorted .sym file 2020-04-04 18:42:31 +00:00			`SECTION "rst28", ROM0[$0028]`
			`JumpTable::`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`push de`
			`ld e, a`
			`ld d, 0`
			`add hl, de`
			`add hl, de`
			`ld a, [hli]`
			`ld h, [hl]`
Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`; SECTION "rst30", ROM0[$0030]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`ld l, a`
			`pop de`
			`jp hl`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "rst38", ROM0[$0038]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`rst $38`


			`; Game Boy hardware interrupts`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "vblank", ROM0[$0040]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`jp VBlank`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "lcd", ROM0[$0048]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`jp LCD`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "timer", ROM0[$0050]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`jp Timer`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "serial", ROM0[$0058]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`jp Serial`

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "joypad", ROM0[$0060]`
JoypadInt -> Joypad This matches all other interrupts. The old Joypad was renamed to UpdateJoypad. 2020-02-23 13:33:53 +00:00			`jp Joypad`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00

Fix the sections in home/header.asm They're fixed anyway, and this allows us to make some expressions constant. 2020-02-23 19:11:54 +00:00			`SECTION "Header", ROM0[$0100]`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00
			`Start::`
Ensure that the cartridge header is patched over all $00s, and comment on the entry point format 2020-04-06 17:35:38 +00:00			`; Nintendo requires all Game Boy ROMs to begin with a nop ($00) and a jp ($C3)`
			`; to the starting address.`
Create home/header.asm Contains what was previously in: - home/rst.asm - home/interrupts.asm - home.asm All of this should be in a static location in the ROM so it kinda makes sense together. 2020-02-23 13:28:21 +00:00			`nop`
			`jp _Start`

Ensure that the cartridge header is patched over all $00s, and comment on the entry point format 2020-04-06 17:35:38 +00:00			`; The Game Boy cartridge header data is patched over by rgbfix.`
			`; This makes sure it doesn't get used for anything else.`

			`ds $0150 - @, $00`