PAGE
	SBTTL "--- HARDWARE EQUATES: APPLE II ---"

	; -------------------
	; APPLE II MEMORY MAP
	; -------------------

LBUFF	EQU	$0200		; LINE INPUT BUFFER (80 BYTES)
SCREEN	EQU	$0400		; START OF SCREEN RAM
LSTLNE	EQU	$07D0		; LAST LINE OF SCREEN RAM
ZIP	EQU	$0800		; START OF EXECUTABLE ZIP CODE

IOBUFF	EQU	ZIP+$2100	; PAGING BUFFER (ASSUME 8K+ ZIP)
BUFFA	EQU	IOBUFF+$0100	; SECTOR DECODE BUFFER, LOWER HALF
BUFFB	EQU	BUFFA+$0100	; SECTOR DECODE BUFFER, UPPER HALF

PTABL	EQU	BUFFB+$0100	; PAGING TABLE, LSBS
PTABH	EQU	PTABL+$0100	; PAGING TABLE, MSBS
LRUMAP	EQU	PTABH+$0100	; TIMESTAMP TABLE

ZSTAKL	EQU	LRUMAP+$0100	; Z-STACK LSBS
ZSTAKH	EQU	ZSTAKL+$0100	; Z-STACK MSBS
LOCALS	EQU	ZSTAKH+$0100	; LOCAL VARIABLE STORAGE (30 BYTES)
BUFSAV	EQU	LOCALS+$20	; AUXILIARY INPUT BUFFER (80 BYTES)

ZBEGIN	EQU	LOCALS+$0100	; START OF Z-PRELOAD

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

ARROW	EQU	$08		; LEFT ARROW (BACKSPACE)
EOL	EQU	$0D		; EOL CHAR
LF	EQU	$0A		; LINE FEED
SPACE	EQU	$20		; SPACE CHAR
BACKSP	EQU	$7F		; BACKSPACE

READ	EQU	$00		; "READ" COMMAND
WRITE	EQU	$01		; "WRITE" COMMAND

TOP	EQU	1		; NORMAL TOP EXCLUDING STATUS LINE
BOTM	EQU	24		; BOTTOM SCREEN LINE

ZTRKF	EQU	2		; FIRST TRACK GAME IS ON
ZTRKL	EQU	36		; ANYTHING FROM HERE UP IS ILLEGAL

	; ----------------------
	; BOOT ZERO PAGE EQUATES
	; ----------------------

BADDR	EQU	$26		; (WORD) ROM BOOT ADDRESS
BSLOT	EQU	$2B		; (BYTE) ROM BOOT SLOT
BSECT	EQU	$3D		; (BYTE) BOOT SECTOR TO READ

	; ----------------
	; HARDWARE EQUATES
	; ----------------

KBD	EQU	$C000		; KEY STROBE
ANYKEY	EQU	$C010		; ANY KEY DOWN FLAG
TXTSET  EQU	$C051		; SWITCH FOR TEXT MODE
MIXCLR	EQU	$C052		; SWITCH FOR MIX MODE CLEAR
LOWSCR	EQU	$C054		; SWITCH FOR PAGE 1 SELECT

	; ------------------------
	; IDOS INTERFACE VARIABLES
	; ------------------------

DCBSLT	EQU	$60		; (BYTE) TARGET SLOT ID
DCBPSL	EQU	DCBSLT+1	; (BYTE) PREVIOUSLY ACCESSED SLOT
DCBDRV	EQU	DCBSLT+2	; (BYTE) TARGET DRIVE ID
DCBPDR	EQU	DCBSLT+3	; (BYTE) PREVIOUSLY ACCESSED DRIVE
DCBSEC	EQU	DCBSLT+4	; (BYTE) TARGET SECTOR
DCBTRK	EQU	DCBSLT+5	; (BYTE) TARGET TRACK
DCBERR	EQU	DCBSLT+6	; (BYTE) DRIVE ERROR CODE
DCBCMD	EQU	DCBSLT+7	; (BYTE) DISK COMMAND ID
DCBBFL  EQU     DCBSLT+8        ; (BYTE) LO POINTER TO DATA BUFFER
DCBBFH  EQU     DCBSLT+9        ; (BYTE) HI POINTER TO DATA BUFFER
DRVFLG	EQU	DCBSLT+10	; (BYTE) CURRENT DRIVE
SLTMP3	EQU	DCBSLT+11	; (BYTE) TRACK-SEEK SLOT
TTRK  	EQU	DCBSLT+12	; (BYTE) TARGET TRACK
DTMP3 	EQU	DCBSLT+13	; (BYTE) WORK BYTE
DTMP4 	EQU	DCBSLT+14	; (BYTE) SLOT ID * 16
HDRCHK	EQU	DCBSLT+15	; (BYTE) CHECKSUM FOUND
HDRSEC	EQU	DCBSLT+16	; (BYTE) SECTOR FOUND
HDRTRK	EQU	DCBSLT+17	; (BYTE) TRACK FOUND
HDRVOL  EQU     DCBSLT+18       ; (BYTE) VOLUME FOUND
DCNT 	EQU	DCBSLT+19	; (BYTE) MOTOR TIME COUNT
DTMP2   EQU     DCBSLT+20       ; (BYTE) TEMP

	; ---------------------
	; DISK HARDWARE EQUATES
	; ---------------------

PH0OFF	EQU	$C080		; STEP MOTOR POSITION #0
DRVOFF	EQU	$C088		; DRIVE MOTOR OFF
DRVON	EQU	$C089		; DRIVE MOTOR ON
DRV0EN	EQU	$C08A		; ENGAGE DRIVE #1
DRV1EN	EQU	$C08B		; ENGAGE DRIVE #2
Q6L  	EQU	$C08C		; READ DATA LATCH
Q6H  	EQU	$C08D		; WRITE DATA LATCH
Q7L   	EQU	$C08E		; SET READ MODE
Q7H   	EQU	$C08F		; SET WRITE MODE

	; -----------------
	; MONITOR VARIABLES
	; -----------------

WLEFT	EQU	$20		; LEFT MARGIN (0)
WWIDTH	EQU	$21		; RIGHT MARGIN (40 OR 80)
WTOP	EQU	$22		; TOP LINE (0-23)
WBOTM	EQU	$23		; BOTTOM LINE (1-24)
CH	EQU	$24		; CURSOR HORIZONTAL
CV	EQU	$25		; CURSOR VERTICAL
BASL	EQU	$28		; SCREEN LINE
INVFLG	EQU	$32		; CHAR OUTPUT MASK ($FF=NORM, $3F=INVERSE)
PROMPT	EQU	$33		; PROMPT CHARACTER (SET TO >)
CSW	EQU	$36		; CHARACTER OUTPUT VECTOR
RNUM1	EQU	$4E		; RANDOM #'S GENERATED BY 
RNUM2	EQU	$4F		; MONITOR GETKEY
EH	EQU	$057B		; CURSOR HORIZONTAL (IIE/C)

	; ----------------
	; MONITOR ROUTINES
	; ----------------

BASCAL	EQU	$FC22		; CALC LINE BASE ADDRESS
BELL	EQU	$FF3A		; MAKE A NOISE
CLEOL	EQU	$FC9C		; CLEAR TO END OF LINE
CLEOS	EQU	$FC42		; CLEAR TO END OF SCREEN
HOME	EQU	$FC58		; CLEAR SCREEN/HOME CURSOR
MCOUT	EQU	$FDED		; CHAR OUTPUT
COUT1	EQU	$FDF0		; CHAR OUTPUT TO SCREEN
RDKEY	EQU	$FD0C		; READ KEY
GETLN1	EQU	$FD6F		; GET LINE

	END