| Header File
| Created 8/2/2004; 2:57:42 PM

.equ GB_DEBUG, 0
|.equ GB_DEBUG, 1

.include "OS.h"

.equ OPCODE_SIZE, 70
.equ PREFIX_OPCODE_SIZE, 60
.equ IO_WRITE_SIZE, 60
.equ MEM_WRITE_SIZE, 60

| GB_DATA
.equ PC_BLOCK, (0)
.equ SP_BLOCK, (PC_BLOCK+4)
.equ PC_BASE, (PC_BLOCK+2)
.equ SP_BASE, (SP_BLOCK+2)

.equ FRAME_COUNTER, (SP_BLOCK+4)
.equ CPU_HALT, (FRAME_COUNTER+1)
|.equ EI_SAVE_PTR, (CPU_HALT+1)
|.equ EI_SAVE_NEXT, (EI_SAVE_PTR+4)
.equ NEXT_EVENT, (CPU_HALT+1)
|.equ SAVE_EVENT_EI, (NEXT_EVENT+4)
|.equ SAVE_EVENT_MEM16, (NEXT_EVENT+4)
|.equ SAVE_COUNT_EI, (SAVE_EVENT_MEM16+4)
|.equ SAVE_COUNT_MEM16, (SAVE_EVENT_MEM16+4)
|.equ MEM_WRITE16_BASE, (NEXT_EVENT+4)
.equ ERROR, (NEXT_EVENT+2)

.equ GB_PC, (ERROR+2)
.equ GB_SP, (GB_PC+2)
.equ EVENT_COUNTER, (GB_SP+2)
.equ MEM_BASE, (EVENT_COUNTER+2)
.equ GB_A, (MEM_BASE+4)
.equ GB_F, (GB_A+1)
.equ GB_HL, (GB_F+1)
.equ GB_BC, (GB_HL+2)
.equ GB_DE, (GB_BC+2)

.equ LIGHT_PLANE, (GB_DE+2)
.equ DARK_PLANE, (LIGHT_PLANE+4)

.equ GB_RAM, (DARK_PLANE+4)
.equ ROM_PTR, (GB_RAM+4)
.equ BG_TILEMAP, (ROM_PTR+43*4)
.equ WINDOW_TILEMAP, (BG_TILEMAP+4)
.equ BG_WINDOW_GFX, (WINDOW_TILEMAP+4)
.equ BG_WINDOW_TILEDATA, (BG_WINDOW_GFX+4)
.equ BG_WINDOW_UPDATE_PAL, (BG_WINDOW_TILEDATA+4)
.equ BANK_TABLE, (BG_WINDOW_UPDATE_PAL+4)
.equ RTC_BLOCK, (BANK_TABLE+4)
.equ ROM_NAME, (RTC_BLOCK+4)
.equ BG_PALETTE, (ROM_NAME+4)
.equ OB0_PALETTE, (BG_PALETTE+8)
.equ OB1_PALETTE, (OB0_PALETTE+6)
.equ UPDATE_PAL, (OB1_PALETTE+6)
.equ BG_GFX, (UPDATE_PAL+384)
.equ OBP0_GFX, (BG_GFX+384*16)
.equ OBP1_GFX, (OBP0_GFX+256*16)
.equ MASK_GFX, (OBP1_GFX+256*16)
.equ IME, (MASK_GFX+384*8)
.equ HALT_LY_CHECK, (IME+1)
.equ RTC_ENABLE, (HALT_LY_CHECK+1)
.equ RTC_LATCH, (RTC_ENABLE+1)
.equ RTC_CURRENT, (RTC_LATCH+1)
.equ RTC_LATCHED, (RTC_CURRENT+5)
.equ ON_PRESSED, (RTC_LATCHED+5)
.equ QUIT, (ON_PRESSED+1)
.equ BREAKPOINT, (QUIT+1)
.equ CART_TYPE, (BREAKPOINT+1)
.equ CURRENT_ROM, (CART_TYPE+1)
.equ ROM_BANKS, (CURRENT_ROM+1)
.equ CURRENT_RAM, (ROM_BANKS+1)
.equ RAM_BANKS, (CURRENT_RAM+1)
.equ RAM_BLOCKS, (RAM_BANKS+1)
.equ RAM_ENABLE, (RAM_BLOCKS+1)
.equ MBC_MODE, (RAM_ENABLE+1)
.equ Y_OFFSET, (MBC_MODE+1)
.equ BREAK_COUNTER, (Y_OFFSET+1)
.equ TIMER_COUNTER, (BREAK_COUNTER+1)
.equ TIMER_SPEED, (TIMER_COUNTER+1)
.equ TIMER_SHIFT, (TIMER_SPEED+1)
.equ FRAME_SKIP, (TIMER_SHIFT+1)
.equ SHOW_FPS, (FRAME_SKIP+1)
.equ ARCHIVE_SRAM, (SHOW_FPS+1)
.equ ENABLE_TIMER, (ARCHIVE_SRAM+1)
.equ ENABLE_SERIAL, (ENABLE_TIMER+1)
.equ SRAM_SAVESTATE, (ENABLE_SERIAL+1)
.equ VTI, (SRAM_SAVESTATE+1)
.equ AMS207, (VTI+1)
.equ HW_VERSION, (AMS207+1)
.equ CALC_TYPE, (HW_VERSION+1)
.equ INT3_ENABLED, (CALC_TYPE+1)
.equ INTS_REDIRECTED, (INT3_ENABLED+1)
.equ OLD_INT, (INTS_REDIRECTED+1)

| RTC Regs
.equ RTC_S, 0
.equ RTC_M, 1
.equ RTC_H, 2
.equ RTC_DL, 3
.equ RTC_DH, 4

| VIDEO RAM
.equ TILEMAP0, 0x1800
.equ TILEMAP1, 0x1C00
.equ TILEDATA0, 0x1000
.equ TILEDATA1, 0x0000

| IO PORTS
.equ LCDC, 0x40
.equ STAT, 0x41
.equ SCX, 0x43
.equ SCY, 0x42
.equ WX, 0x4B
.equ WY, 0x4A
.equ LY, 0x44
.equ LYC, 0x45
.equ DIV, 0x04
.equ TIMA, 0x05
.equ TMA, 0x06
.equ TAC, 0x07
.equ IF, 0x0F
.equ IE, 0xFF
.equ P1, 0x00
.equ SB, 0x01
.equ SC, 0x02
.equ BGP, 0x47
.equ OBP0, 0x48
.equ OBP1, 0x49

| HALT STATES
.equ HALT_NONE, 0
.equ HALT_PENDING, 1
.equ HALT_AFTER_EI, 2

.macro NEXT_INSTRUCTION2 offset
.if GB_DEBUG
	jmp debugger_entry
.else
	move.b (%a4)+, (\offset-function_base-2, %a3)
	jmp (0x7f00+6+MEM_WRITE_SIZE+IO_WRITE_SIZE+PREFIX_OPCODE_SIZE, %a6)
.endif
.endm