IFND	LIBRARIES_ATARI2600_I
LIBRARIES_ATARI2600_I	SET	1
**
**	$VER: atari2600.i 1.1 (14.6.99)
**
**	atari2600 library definitions
**
**	(C) Copyright 1999 Neil Cafferkey
**	All Rights Reserved
**


	include	"exec/types.i"
	include	"utility/tagitem.i"

ATARI2600NAME   MACRO
	dc.b "atari2600.library",0
	ENDM

ATARI2600VERSION		equ	 1

	; Various constants

A2600_CLR_CLK_FACTOR	equ	3

A2600_TV_WIDTH	equ	160
A2600_TV_HEIGHT	equ	230	; officially 192

A2600_H_BLANK_CYCLES	equ	68
A2600_LINE_CYCLES	equ	A2600_H_BLANK_CYCLES+A2600_TV_WIDTH


	; Addresses of Atari 2600 read registers

A2600_CXM0P		equ	$0
A2600_CXM1P		equ	$1
A2600_CXP0FB		equ	$2
A2600_CXP1FB		equ	$3
A2600_CXM0FB		equ	$4
A2600_CXM1FB		equ	$5
A2600_CXBLPF		equ	$6
A2600_CXPPMM		equ	$7
A2600_INPT4		equ	$c
A2600_INPT5		equ	$d

A2600_SWCHA		equ	$280
A2600_SWCHB		equ	$282


	; Tags for a new environment

	ENUM	TAG_USER
	EITEM	A2600TAG_ProgramName
	EITEM	A2600TAG_ExitFunction


	ENDC	; LIBRARIES_ATARI2600_I