; External registers
btn_port:						equ		0x00	; RO
led_port:	 					equ		0x01	; R/W
uart_data:						equ		0x02	; R/W
lcd_port:	 					equ		0x03	; R/W
ctrl_reg:	 					equ		0x04	; R/W
CTRL_VGA_ENABLE:				equ		0x04
CTRL_TIMER_ENABLE:				equ		0x02
dip_port:	 					equ		0x05	; RO
uart_status:					equ		0x06	; RO
sdram_reg:						equ		0x07	; R/W
FIFO_CTRL_IS_CMD:				equ		0x04		
FIFO_CTRL_IS_WRITE:				equ		0x10		
FIFO_CTRL_IS_READ:				equ		0x20		
FIFO_STAT_CMD_FULL:				equ		0x01		
FIFO_STAT_CMD_EMPTY:			equ		0x02		
FIFO_STAT_WRITE_DATA_FULL:		equ		0x04		
FIFO_STAT_WRITE_DATA_EMPTY:		equ		0x08		
FIFO_STAT_READ_DATA_FULL:		equ		0x10		
FIFO_STAT_READ_DATA_EMPTY:		equ		0x20		
sdram_addr:						equ		0x08	; R/W
sdram_addr0:					equ		0x08	; R/W
sdram_addr1:					equ		0x09	; R/W
sdram_addr2:					equ		0x0A	; R/W
reg_cg_char_addr:				equ		0x0B	; RW
reg_cg_line_addr:				equ		0x0C	; RW
reg_cg_data:					equ		0x0D	; RW
reg_cg_ctrl:					equ		0x0E	; WO
reg_hwstat:						equ		0x0E	; RO
reg_color_red:					equ		0x10	; RW
reg_color_grn:					equ		0x11	; RW
reg_color_blu:					equ		0x12	; RW
uart_baudrate:					equ		0x13	; R/W
vga_read_addr:					equ		0x14	; R/W
vga_read_addr0:					equ		0x14	; R/W
vga_read_addr1:					equ		0x15	; R/W
vga_read_addr2:					equ		0x16	; R/W
timer_reload:					equ		0x17	; R/W
timer_reload0:					equ		0x17	; R/W
timer_reload1:					equ		0x18	; R/W
timer_reload2:					equ		0x19	; R/W