; Copyright (c) 1996 Brian Fisher
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
; 1. Redistributions of source code must retain the above copyright
;    notice, this list of conditions and the following disclaimer.
; 2. Redistributions in binary form must reproduce the above copyright
;    notice, this list of conditions and the following disclaimer in the
;    documentation and/or other materials provided with the distribution.
; 3. The name of the author may not be used to endorse or promote products
;    derived from this software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
; IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;***************************************************************************
;*
;*
;*** Setpal, fadeto,fadetopal
;*
;*

.286
Ideal
Model Small
Public Setpal,fadeto,fadetopal

Codeseg
doneyet dw 0
red     db 0
green   db 0
blue    db 0
paloff	dw 0
palseg	dw 0

proc    Setpal  ; palbuff()
		;    6
	push bp
	mov bp,sp
	push ds si es di
	
	cld
	mov bx,[ss:bp+06]
	mov si,[ds:bx+0ah]
	mov ds,[ds:bx+02h]
	mov dx,03dah
	mov cx,768
rtr:
	in al,dx
	test al,08h
	jnz rtr
tra:
	in al,dx
	test al,08h
	jz tra
	mov dx,03c8h
	mov al,0
	out dx,al
	inc dx
setit:
	outsb
	inc si
	loop setit
	pop di es si ds bp
	retf 2
endp    setpal

Proc    Fadeto  ;  buff(), red, green, blue
		;    12     10    8     6
	push bp
	mov bp,sp
	push ds si es di

	cld
	mov ax,[ss:bp+10]
	mov [red],al
	mov ax,[ss:bp+08]
	mov [green],al
	mov ax,[ss:bp+06]
	mov [blue],al
	mov dx,03c7h
	mov al,0
	out dx,al
	mov dx,03c9h
	mov cx,768
	mov bx,[ss:bp+12]
	mov si,[ds:bx+0ah]
	mov es,[ds:bx+02h]
	mov ds,[ds:bx+02h]
	mov bx,si
	mov di,bx
	rep insb
fadeloop:
	mov si,bx
	mov di,bx
	mov dx,0
	mov cx,256
redloop:
	lodsb 
	mov ah,[red]
	cmp al,ah
	ja rdown
	jb rup
	inc dx
	jmp grnloop
rdown:
	dec al
	jmp grnloop
rup:
	inc al
grnloop:
	stosb
	lodsb 
	mov ah,[green]
	cmp al,ah
	ja gdown
	jb gup
	inc dx
	jmp bluloop
gdown:
	dec al
	jmp bluloop
gup:
	inc al
bluloop:
	stosb
	lodsb 
	mov ah,[blue]
	cmp al,ah
	ja bdown
	jb bup
	inc dx
	jmp nextclr
bdown:
	dec al
	jmp nextclr
bup:
	inc al
nextclr:
	stosb
	loop redloop
	mov [doneyet],dx
	mov si,bx
	mov dx,03dah
	mov cx,768
retr:
	in al,dx
	test al,08h
	jnz retr
trac:
	in al,dx
	test al,08h
	jz trac
	mov dx,03c8h
	mov al,0
	out dx,al
	inc dx
	rep outsb
	mov ax,[doneyet]
	cmp ax,768
	jb fadeloop

	pop di es si ds bp
	retf 8
endp    fadeto        

Proc    Fadetopal;  pal(), buff()
	push bp
	mov bp,sp
	push ds si es di

	cld
	mov dx,03c7h
	mov al,0
	out dx,al
	mov dx,03c9h
	mov cx,768
	mov bx,[ss:bp+06]
	mov di,[ds:bx+0ah]
	mov es,[ds:bx+02h]
	mov bx,[ss:bp+08]
	mov si,[ds:bx+0ah]
	mov ds,[ds:bx+02h]
	mov [cs:paloff],si
	mov [cs:palseg],ds
	rep insb
	sub di,768
fadeit:
	mov dx,0
	mov cx,768
	mov ds,[cs:palseg]
	mov si,[cs:paloff]
clrloop:
	lodsw 
	mov ah,al
	mov al,[es:di]
	cmp al,ah
	ja down
	jb up
	inc dx
	jmp next
down:
	dec al
	jmp next
up:
	inc al
next:
	stosb
	loop clrloop
	mov [doneyet],dx
	mov dx,03dah
	mov cx,768
	sub di,768
	mov si,di
	mov ax,es
	mov ds,ax
retra:
	in al,dx
	test al,08h
	jnz retra
trace:
	in al,dx
	test al,08h
	jz trace
	mov dx,03c8h
	mov al,0
	out dx,al
	inc dx
	rep outsb
	mov ax,[doneyet]
	cmp ax,768
	jb fadeit

	pop di es si ds bp
	retf 4
endp    fadetopal
end