PAGE
	SBTTL "--- HARDWARE EQUATES: ATARI ---"

	; ----------------
	; ATARI MEMORY MAP
	; ----------------

IOBUFF	EQU	$0400		; DISK I/O BUFFER
BUFTOP	EQU	$0480		; TOP HALF OF I/O BUFFER
ZSTAKL	EQU	$0500		; Z-STACK LSBS
ZSTAKH	EQU	$0600		; Z-STACK MSBS
PTABL	EQU	$0700		; PAGING TABLE LSBS
PTABH	EQU	$0800		; PAGING TABLE MSBS
LRUMAP	EQU	$0900		; TIMESTAMP MAP
LOCALS	EQU	$0A00		; LOCAL VARIABLE STORAGE (30 BYTES)
BUFSAV	EQU	$0A20		; AUXILIARY INPUT BUFFER (80 BYTES)
LBUFF	EQU	$0A80		; MAIN INPUT BUFFER (80 BYTES)

PLMRAM	EQU	$0800		; START OF PLAYER/MISSILE RAM
MISSL	EQU	$0B00		; START OF MISSILE RAM (CURSOR)

ZIP	EQU	$0C00		; START OF ZIP CODE
ZBEGIN	EQU	$2600		; START OF Z-CODE (ASSUME 6.5K ZIP)

OLDLST	EQU	$BC20		; CIO DEFAULT DL ADDR
SCREEN	EQU	$BC40		; START OF SCREEN RAM

	; ---------
	; CONSTANTS
	; ---------

XSIZE	EQU	39		; WIDTH OF SCREEN IN CHARACTERS (-1)
YSIZE	EQU	23		; HEIGHT OF SCREEN IN LINES (-1)

EOL	EQU	$9B		; EOL CHAR
SPACE	EQU	$20		; SPACE CHAR
BACKSP	EQU	126		; BACKSPACE

	; ---------
	; ZER0-PAGE
	; ---------

BOOT	EQU	$09		; BOOT FLAG
DOSVEC	EQU	$0A		; DOS START VECTOR
POKMSK	EQU	$10		; FOR BREAK KEY DISABLE
RTCLOK	EQU	$14		; JIFFY CLOCK
LMARGN	EQU	$52		; LEFT MARGIN
ROWCRS	EQU	$54		; OS CURSOR ROW
COLCRS	EQU	$55		; OS CURSOR COLUMN

	; ---------
	; PAGES 2-3
	; ---------

SDMCTL	EQU	$022F		; DMA CONTROL
SDLSTL	EQU	$0230		; DISPLAY LIST ADDRESS
COLDST	EQU	$0244		; COLDSTART FLAG
GPRIOR	EQU	$026F		; GRAPHICS PRIORITY
LOGMAP	EQU	$02B2		; LOGICAL LINE MAP (3 BYTES)
INVFLG	EQU	$02B6		; INVERSE TEXT FLAG
COLOR1	EQU	$02C5		; TEXT COLOR
COLOR4	EQU	$02C8		; BORDER COLOR
CRSINH	EQU	$02F0		; OS CURSOR INHIBIT
CH	EQU	$02FC		; KEYBOARD READ FLAG
DUNIT	EQU	$0301		; DRIVE #
DCOMND	EQU	$0302		; DISK COMMAND
DSTATS	EQU	$0303		; DISK I/O STATUS
DBUFLO	EQU	$0304		; DISK BUFFER ADDR (LSB)
DBUFHI	EQU	$0305		; DISK BUFFER ADDR (MSB)
DAUX1	EQU	$030A		; SECTOR ADDR (LSB)
DAUX2	EQU	$030B		; SECTOR ADDR (MSB)
ICCOM	EQU	$0342		; IOCB #0 COMMAND
ICBADR	EQU	$0344		; IOCB #0 BUFFER ADDR
ICBLEN	EQU	$0348		; IOCB #0 LENGTH
ICAUX1	EQU	$034A		; IOCB #0 AUX BYTE #1
ICAUX2	EQU	$034B		; IOCB #0 AUX BYTE #2

	; ------------------
	; GTIA, POKEY, ANTIC
	; ------------------

HPOSP0	EQU	$D000		; PLAYER #0 H-POS
HPOSM0	EQU	$D004		; MISSILE #0 H-POS
SIZEM	EQU	$D00C		; MISSILE SIZES
GRACTL	EQU	$D01D		; P/M GRAPHICS CONTROL
CONSOL	EQU	$D01F		; CONSOLE KEY REGISTER
AUDF1	EQU	$D200		; AUDIO CH1 FREQ
AUDC1	EQU	$D201		; AUDIO CH1 CTRL
AUDCTL	EQU	$D208		; AUDIO CONTROL
MRAND	EQU	$D20A		; RANDOM BYTE
IRQEN	EQU	$D20E		; IRQ ENABLE
SKCTL	EQU	$D20F		; SERIAL PORT CONTROL
PORTB	EQU	$D301		; PORT B (XL ROM SWITCH)
DMACTL	EQU	$D400		; DMA CONTROL
PMBASE	EQU	$D407		; PMG RAM BASE ADDR

	; ------
	; OS ROM
	; ------

DSKINV	EQU	$E453		; SIO DISK ACCESS
CIOV	EQU	$E456		; CIO VECTOR

	END