; USE file for the XTile  Assembler routine lib
;
; COPYRIGHT (C) 1992 Erich P Gatejen 1992  All Rights Reserved
;
; File: XTILE.USE
;
; Mode X graphics manager.


; XTile Asm Constants

SC_INDEX	equ	03C4h 	;Sequence Controller Index
CRTC_INDEX	equ     03D4h	;CRT Controller Index
MISC_OUTPUT	equ	03C2h	;Misc. Output Reg.
SCREEN_SEG	equ     0A000h	;Display memory seg.
IN_STATUS0	equ	03c2h
IN_STATUS1	equ     03DAh
AC_INDEXR	equ	03c0h
BIT_MASK	equ	08h	;Index to bit mask
GC_INDEX	equ     03CEh	;Graphics Controller Index
PAL_SET_COLOR   equ     03C8h	;Palette color set
PAL_RGB_COLOR	equ	03C9h	;Palette data port


PAGE0		equ	0	;Page 0 offset
PAGE1		equ  	19200	;Page 1 offset
BACKGROUND	equ	38400	;Background page offset
STORE		equ	57600	;Image/Tile storage
DIRECT_PAGE	equ	8	;Indicates direct load of write page offset

SCREEN_W		equ	80		;Dec 80. Pix X. ( 80 x 4deep = 320 )

; Dispositions for the SD_Move_Tile
ON_SCREEN		equ	0
TO_ALT_PAGE	equ  1
TO_BACKGROUND  equ  2



; Constants for mouse
MOUSE_PRESENT	equ  0
MOUSE_NOTPRES  equ	1
MBACK_VALID    equ  0
MBACK_INVALID  equ  1

MOUSEPSIZE	equ	16			;  20 XBlocks per alignment
MSAVEOFFSET	equ	0FFFFh - 16    ; Mouse background save site
				; ^^Top of memory minus size in XBlocks of image
MOUSEOFFSET    equ  0FFFFh - 80    ; Address for mouse pointer
				; XBlocks adjustment is compensated by 4 alignments

; Types of font register
UPLOADFONT	equ	0
DONTUPLOADFONT equ  1

; MASKFONT write
DOMASK		equ  1
DONTMASK		equ  0

; MOUSE HANDLER LOCK
LOCKM		equ	1
NOTLOCKM		equ	0

; General
TRUE			equ	1
FALSE		equ	0