Estex-DSS/DSS/Procedures.asm

;!TODO Procedures
;----------------------------------------------------------------------;
; ‡ ª®¤¨à®¢ âì ¢à¥¬ï/¤ âã
; ¢å®¤: de - ¤¥­ì/¬¥áïæ
;       hl - ç áë/¬¨­ãâë
;        b - ᥪ㭤ë
;       ix - £®¤
; ¢ë室: de - ¢à¥¬ï
;        bc - ¬¥áïæ/¤¥­ì
;        ix - £®¤
;
;INPUT:	D - DAY;  E - MONTH
;	H - HOUR; L - MINUTE
;	B - SECOND (0...59)
;	IX- YEAR (0...65535)
;OUTPUT: DE - hhhhhmmmmmmsssss	h - hour, m - min, s - sec/2
;	 BC - yyyyyyymmmmddddd	y - year, m - month, d - day
;			       (1980-2108)
MK_TIME:
	LD	A,L
	RLCA 
	RLCA 
	SLA	A
	RL	H
	SLA	A
	RL	H
	SLA	A
	RL	H
	SRL	B
	OR	B
	LD	L,A

	LD	BC,#F844	;(-1980)
	ADD	IX,BC
	LD	A,E
	RLCA 
	RLCA 
	RLCA 
	RLCA 
	AND	#F0
	LD	B,XL
	SLA	A
	RL	B
	OR	D
	LD	C,A
	EX	DE,HL
	AND	A
	RET 
;----------------------------------------------------------------------;

;!TODO Procedures
;----------------------------------------------------------------------;
; <20> áª®¤¨à®¢ âì ¢à¥¬ï/¤ âã
; ¢å®¤: de - ¢à¥¬ï
;       bc - ¬¥áïæ/¤¥­ì
;       ix - £®¤
; ¢ë室: de - ¤¥­ì/¬¥áïæ
;        hl - ç áë/¬¨­ãâë
;         b - ᥪ㭤ë
;        ix - £®¤
;
;INPUT:	DE - hhhhhmmmmmmsssss  h - hour, m - min, s - sec/2
;	BC - yyyyyyymmmmddddd  y - year, m - month, d -	day
;			       (1980-2108)
;OUTPUT: D - DAY;  E - MONTH
;	 H - HOUR; L - MINUTE
;	 B - SECOND (0...59)
;	 IX- YEAR (0...65535)
RMKTIME:
	EX	DE,HL
	LD	A,C
	AND	#1F
	LD	D,A
	SRL	B
	RR	C
	LD	A,C
	RRCA 
	RRCA 
	RRCA 
	RRCA 
	AND	#0F
	LD	E,A
	LD	C,B
	LD	B,0
	LD	IX,1980
	ADD	IX,BC
	LD	A,L
	AND	#1F
	ADD	A,A
	LD	B,A
	SRL	H
	RR	L
	SRL	H
	RR	L
	SRL	H
	RR	L
	SRL	L
	SRL	L
	AND	A
	RET 
;----------------------------------------------------------------------;


;----------------------------------------------------------------------;
; [ ]	25/01/2024
; ¢å®¤:   D - ¤¥­ì
;         E - ¬¥áïæ
;        IX - £®¤
; ¢ë室:  H - ¤¥­ì ­¥¤¥«¨ (1 - ¢®áªà¥á¥­ì¥)
CalcDayOfWeek:	;!FIXIT ¢ëç¨á«ïâì ¤¥­ì ­¥¤¥«¨
		 ; x = (14 ? ¬¥áïæ) / 12
		 ; y = £®¤ ? x
		 ; m = ¬¥áïæ + 12 * x ? 2
		 ; „¥­ì<C2AD>¥¤¥«¨ = (7000 + (¤¥­ì + y + y/4 ? y/100 + y/400 + (31 * m)/12)) mod 7
		 ; ‚ᥠ¤¥«¥­¨ï 楫®ç¨á«¥­­ë¥ (®áâ â®ª ®â¡à á뢠¥âáï).
		;
		LD	A,D
		LD	(.day),A
		; x = (14 ? ¬¥áïæ) / 12
		; y = £®¤ ? x
		LD	A,E
		CP	3
		LD	A,0
		JR	NC,1F
		DEC	IX
		LD	A,12
1:		;	y = IX
		; m = ¬¥áïæ + 12 * x ? 2
		ADD	E
		SUB	2
		;	m = A
		; HL = (31 * m)
		LD	D,0
		LD	E,A
		RLA
		RLA
		RLA
		LD	H,D
		LD	L,A
		ADD	HL,HL
		ADD	HL,HL
		SBC	HL,DE
		;	(31 * m) = HL
		; BC = (31 * m) / 12
		LD	B,H
		LD	C,L
		;   D=0
		LD	E,12
		CALL	BC_Div_DE
		;	(31 * m) / 12 = BC
		LD	(.m31_12),BC
		; y / 4
		PUSH	IX
		POP	BC
		;   D=0
		LD	E,4
		CALL	BC_Div_DE
		;	y / 4 = BC
		PUSH	BC
		; y / 100
		PUSH	IX
		POP	BC
		;   D=0
		LD	E,100
		CALL	BC_Div_DE
		;	y / 100 = BC
		PUSH	BC
		; y / 400
		PUSH	IX
		POP	BC
		LD	DE,400
		CALL	BC_Div_DE
		;	y / 400 = BC
		; y/400 - y/100
		AND	A
		LD	H,B
		LD	L,C
		POP	DE
		SBC	HL,DE
		;	y/400 - y/100 = HL
		; y/4 ? y/100 + y/400
		POP	DE
		ADD	HL,DE
		; y/4 ? y/100 + y/400 + (31 * m)/12
.m31_12+1:	LD	DE,0
		ADD	HL,DE
		; y + y/4 ? y/100 + y/400 + (31 * m)/12
		EX	DE,HL
		ADD	IX,DE
		; ¤¥­ì + y + y/4 ? y/100 + y/400 + (31 * m)/12
		LD	D,0
.day+1:		LD	E,0
		ADD	IX,DE
		; 7000 + (¤¥­ì + y + y/4 ? y/100 + y/400 + (31 * m)/12)
		LD	DE,7000
		ADD	IX,DE
		; (7000 + (¤¥­ì + y + y/4 ? y/100 + y/400 + (31 * m)/12)) mod 7
		LD	B,XH
		LD	C,XL
		LD	DE,7
		CALL	BC_Div_DE
		;	„¥­ì<C2AD>¥¤¥«¨ = L
		LD	H,L
		INC	H
		RET
;----------------------------------------------------------------------;


;----------------------------------------------------------------------;
; a..z -> A..Z
UPPER:	CP	'a'
	RET	C
	CP	'z' + 1
	JR	NC,.MDUPPER
	SUB	#20
.NOUPPER:
	RET 
.MDUPPER:
	CP	' '		; àãááª ï ¡ãª¢   , ª®¤ #A0
	JR	C,.NOUPPER
	CP	'¯'		; àãááª ï ¡ãª¢  ¯, ª®¤ #B0
	JR	NC,.BGUPPER
	SUB	#20
	RET 
.BGUPPER:
	CP	'à'		; àãááª ï ¡ãª¢  à, ª®¤ #E0
	JR	C,.NOUPPER
	CP	'ð'		; àãááª ï ¡ãª¢  ð, ª®¤ #F0
	JR	NC,.HGUPPER
	SUB	#50
	RET 
.HGUPPER:	CP	'ñ'	; àãááª ï ¡ãª¢  ñ, ª®¤ #F1
	RET	NZ
	DEC	A
	RET 
;----------------------------------------------------------------------;



;!TODO hardware
;----------------------------------------------------------------------;
; —⥭¨¥ ॣ¨áâ஢ CMOS
; ¢å®¤: d=­®¬¥à ॣ¨áâà 
RCMOS:	LD	C,BIOS.CMOS_RD
	RST	ToBIOS
	;JP	BCD2HEX
; INPUT	: A - BCD
; OUTPUT: A - HEX
BCD2HEX:
	LD	E,A
	RRCA 
	RRCA 
	RRCA 
	RRCA 
	AND	#0F
	LD	D,A
	ADD	A,A
	ADD	A,A
	ADD	A,D
	ADD	A,A
	LD	D,A
	LD	A,E
	AND	#0F
	ADD	A,D
	RET 
;----------------------------------------------------------------------;

;!TODO hardware
;----------------------------------------------------------------------;
;!FIXIT ¯¥à¥¤¥« âì ¯® ¤®ª¥ ­  „ «« á ¨ § ¯¨áì ¢ ï祩ª¨ ç á®¢
; ‡ ¯¨áì ॣ¨áâ஢ CMOS
; ¢å®¤: d=­®¬¥à ॣ¨áâà 
WCMOS:	CALL	HEX2BCD
	LD	C,BIOS.CMOS_WR
	JP	ToBIOS

; INPUT	: A - HEX
; OUTPUT: A - BCD
HEX2BCD:
	LD	BC,#0AFF
.loop:	INC	C
	SUB	B
	JR	NC,.loop
	ADD	A,B
	LD	B,A
	LD	A,C
	RLCA 
	RLCA 
	RLCA 
	RLCA 
	AND	#F0
	OR	B
	RET 
;----------------------------------------------------------------------;
;


;
;----------------------------------------------------------------------;
;BC/DE ==> BC, remainder in HL
; ­¥ ¯®àâ¨â DE
BC_Div_DE:
	ld	hl,0
	ld	a,b
	ld	b,16
	;shift the bits from BC into HL
.div_loop:
	sla	c 
	rla
	adc	hl,hl
	sbc	hl,de
	jr	nc,.div_inc_acc
	add	hl,de
	db	$FE     ;this begins the instruction `cp *`, so it eats the next byte.
.div_inc_acc:
	inc	c
	djnz	.div_loop
	ld	b,a
	ret
;----------------------------------------------------------------------;
;

;----------------------------------------------------------------------;
; HL:DE / A  =>  DE:BC, H=0, L - ®áâ â®ª
DIV_for_SPC:
	LD	C,A
	DEC	A
	JR	Z,.exit
	;
	AND	E
	LD	B,A	; ®áâ â®ª
	LD	A,C
	RRCA
	;
.loop:	SRL	H
	RR	L 
	RR	D
	RR	E
	RRCA
	JP	NC,.loop
	LD	A,B
.exit:	LD	B,D
	LD	C,E
	EX	DE,HL
	LD	H,0
	LD	L,A
	RET
;----------------------------------------------------------------------;