mkinitrd-magellan/isolinux/conio.inc

;; -----------------------------------------------------------------------
;;
;;   Copyright 1994-2008 H. Peter Anvin - All Rights Reserved
;;   Copyright 2009 Intel Corporation; author: H. Peter Anvin
;;
;;   This program is free software; you can redistribute it and/or modify
;;   it under the terms of the GNU General Public License as published by
;;   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
;;   Boston MA 02111-1307, USA; either version 2 of the License, or
;;   (at your option) any later version; incorporated herein by reference.
;;
;; -----------------------------------------------------------------------

;;
;; conio.inc
;;
;; Console I/O code, except:
;;   writechr, writestr_early		- module-dependent
;;   writestr, crlf		- writestr.inc
;;   writehex*			- writehex.inc
;;

;
; loadkeys:	Load a LILO-style keymap; file is open on the top of the
;		getc stack.
;
		section .text

loadkeys:
		mov cx,256
		mov di,trackbuf
		call readc
		jc .done				; EOF already?

		; Make sure we are at EOF now...
		call getc
		jnc .done			; We should be at EOF now!

		; It was okay, we can now move it into the KbdMap
		mov si,trackbuf
		mov di,KbdMap
		mov cx,256 >> 2
		rep movsd

.done:
		call close
		ret

;
; get_msg_file: Load a text file and write its contents to the screen,
;               interpreting color codes.  Call with the file already
;		on the top of the open/getc stack.
;
;		Assumes CS == DS == ES.
;
get_msg_file:
                mov byte [TextAttribute],07h	; Default grey on white
		mov byte [DisplayMask],07h	; Display text in all modes
		call msg_initvars

print_msg_file:
.getc:
		call getc
		jc .done
                cmp al,1Ah                      ; DOS EOF?
		je .done
		movzx cx,byte [UsingVGA]
		and cl,01h
		inc cx				; CL <- 01h = text mode,
						;       02h = graphics mode
                call [NextCharJump]		; Do what shall be done
		jmp .getc
.done:
		jmp close			; Tailcall!

msg_putchar:                                    ; Normal character
                cmp al,0Fh                      ; ^O = color code follows
                je msg_ctrl_o
                cmp al,0Dh                      ; Ignore <CR>
                je msg_ignore
                cmp al,0Ah                      ; <LF> = newline
                je msg_newline
                cmp al,0Ch                      ; <FF> = clear screen
                je msg_formfeed
		cmp al,07h			; <BEL> = beep
		je msg_beep
		cmp al,19h			; <EM> = return to text mode
		je msg_novga
		cmp al,18h			; <CAN> = VGA filename follows
		je msg_vga
		jnb .not_modectl
		cmp al,10h			; 10h to 17h are mode controls
		jae msg_modectl
.not_modectl:

msg_normal:	call write_serial_displaymask	; Write to serial port
		test [DisplayMask],cl
		jz msg_ignore			; Not screen
		test byte [DisplayCon],01h
		jz msg_ignore
                mov bl,[TextAttribute]
		mov bh,[BIOS_page]
                mov ah,09h                      ; Write character/attribute
                mov cx,1                        ; One character only
                int 10h                         ; Write to screen
                mov al,[CursorCol]
                inc ax
                cmp al,[VidCols]
                ja msg_line_wrap		; Screen wraparound
                mov [CursorCol],al

msg_gotoxy:     mov bh,[BIOS_page]
                mov dx,[CursorDX]
                mov ah,02h                      ; Set cursor position
                int 10h
msg_ignore:     ret

msg_beep:	mov ax,0E07h			; Beep
		xor bx,bx
		int 10h
		ret

msg_ctrl_o:                                     ; ^O = color code follows
                mov word [NextCharJump],msg_setbg
                ret
msg_newline:                                    ; Newline char or end of line
		mov si,crlf_msg
		call write_serial_str_displaymask
msg_line_wrap:					; Screen wraparound
		test [DisplayMask],cl
		jz msg_ignore
                mov byte [CursorCol],0
                mov al,[CursorRow]
                inc ax
                cmp al,[VidRows]
                ja msg_scroll
                mov [CursorRow],al
                jmp short msg_gotoxy
msg_scroll:     xor cx,cx                       ; Upper left hand corner
                mov dx,[ScreenSize]
                mov [CursorRow],dh		; New cursor at the bottom
                mov bh,[ScrollAttribute]
                mov ax,0601h                    ; Scroll up one line
                int 10h
                jmp short msg_gotoxy
msg_formfeed:                                   ; Form feed character
		mov si,crff_msg
		call write_serial_str_displaymask
		test [DisplayMask],cl
		jz msg_ignore
                xor cx,cx
                mov [CursorDX],cx		; Upper lefthand corner
                mov dx,[ScreenSize]
                mov bh,[TextAttribute]
                mov ax,0600h                    ; Clear screen region
                int 10h
                jmp msg_gotoxy
msg_setbg:                                      ; Color background character
                call unhexchar
                jc msg_color_bad
                shl al,4
		test [DisplayMask],cl
		jz .dontset
                mov [TextAttribute],al
.dontset:
                mov word [NextCharJump],msg_setfg
                ret
msg_setfg:                                      ; Color foreground character
                call unhexchar
                jc msg_color_bad
		test [DisplayMask],cl
		jz .dontset
                or [TextAttribute],al		; setbg set foreground to 0
.dontset:
		jmp short msg_putcharnext
msg_vga:
		mov word [NextCharJump],msg_filename
		mov di, VGAFileBuf
		jmp short msg_setvgafileptr

msg_color_bad:
                mov byte [TextAttribute],07h	; Default attribute
msg_putcharnext:
                mov word [NextCharJump],msg_putchar
		ret

msg_filename:					; Getting VGA filename
		cmp al,0Ah			; <LF> = end of filename
		je msg_viewimage
		cmp al,' '
		jbe msg_ret			; Ignore space/control char
		mov di,[VGAFilePtr]
		cmp di,VGAFileBufEnd
		jnb msg_ret
		mov [di],al			; Can't use stosb (DS:)
		inc di
msg_setvgafileptr:
		mov [VGAFilePtr],di
msg_ret:	ret

msg_novga:
		call vgaclearmode
		jmp short msg_initvars

msg_viewimage:
		mov si,[VGAFilePtr]
		mov byte [si],0			; Zero-terminate filename
		mov si,VGAFileBuf
		mov di,VGAFileMBuf
		call mangle_name
		call open
		jz msg_putcharnext		; Not there
		call vgadisplayfile
		; Fall through

		; Subroutine to initialize variables, also needed
		; after loading a graphics file
msg_initvars:
                pusha
                mov bh,[BIOS_page]
                mov ah,03h                      ; Read cursor position
                int 10h
                mov [CursorDX],dx
                popa
		jmp short msg_putcharnext	; Initialize state machine

msg_modectl:
		and al,07h
		mov [DisplayMask],al
		jmp short msg_putcharnext

;
; write_serial:	If serial output is enabled, write character on serial port
; write_serial_displaymask: d:o, but ignore if DisplayMask & 04h == 0
;
write_serial_displaymask:
		test byte [DisplayMask], 04h
		jz write_serial.end
write_serial:
		pushfd
		pushad
		mov bx,[SerialPort]
		and bx,bx
		je .noserial
		push ax
		mov ah,[FlowInput]
.waitspace:
		; Wait for space in transmit register
		lea dx,[bx+5]			; DX -> LSR
		in al,dx
		test al,20h
		jz .waitspace

		; Wait for input flow control
		inc dx				; DX -> MSR
		in al,dx
		and al,ah
		cmp al,ah
		jne .waitspace
.no_flow:

		xchg dx,bx			; DX -> THR
		pop ax
		slow_out dx,al			; Send data
.noserial:	popad
		popfd
.end:		ret

;
; write_serial_str: write_serial for strings
; write_serial_str_displaymask: d:o, but ignore if DisplayMask & 04h == 0
;
write_serial_str_displaymask:
		test byte [DisplayMask], 04h
		jz write_serial_str.end

write_serial_str:
.loop		lodsb
		and al,al
		jz .end
		call write_serial
		jmp short .loop
.end:		ret

;
; pollchar: check if we have an input character pending (ZF = 0)
;
pollchar:
		pushad
		mov ah,11h		; Poll keyboard
		int 16h
		jnz .done		; Keyboard response
		mov dx,[SerialPort]
		and dx,dx
		jz .done		; No serial port -> no input
		mov ax,[SerialTail]	; Already-queued input?
		cli
		cmp ax,[SerialHead]
		jne .done_sti		; If so, return ZF = 0
		add dx,5		; DX -> LSR
		in al,dx
		test al,1		; ZF = 0 if data pending
		jz .done_sti
		inc dx			; DX -> MSR
		mov ah,[FlowIgnore]	; Required status bits
		in al,dx
		and al,ah
		cmp al,ah
		setne al
		dec al			; Set ZF = 0 if equal
.done_sti:	sti
.done:		popad
		ret

;
; getchar: Read a character from keyboard or serial port
;
getchar.sti_again:
		sti
getchar:
.again:
		call do_idle
		mov ah,11h		; Poll keyboard
		int 16h
		jnz .kbd		; Keyboard input?
		mov bx,[SerialPort]
		and bx,bx
		jz .again
		mov ax,[SerialTail]
		cli
		cmp ax,[SerialHead]
		jne .serial_queued
		lea dx,[bx+5]		; DX -> LSR
		in al,dx
		test al,1
		jz .sti_again
		inc dx			; DX -> MSR
		mov ah,[FlowIgnore]
		in al,dx
		and al,ah
		cmp al,ah
		jne .sti_again
.serial:	xor ah,ah		; Avoid confusion
		mov dx,bx		; Data port
		in al,dx		; Read data
		sti
		jmp .done
.serial_queued:
		sti			; We already know we'll consume data
		xchg bx,ax
		push ds
		mov ax,aux_seg + (aux.serial >> 4)
		mov ds,ax
		mov al,[bx]
		pop ds
		inc bx
		and bx,serial_buf_size-1
		mov [SerialTail],bx
		jmp .done

.kbd:		mov ah,10h		; Get keyboard input
		int 16h
		cmp al,0E0h
		jnz .not_ext
		xor al,al
.not_ext:
		and al,al
		jz .func_key
		mov bx,KbdMap		; Convert character sets
		xlatb
.func_key:
.done:
		jmp reset_idle		; Character received

%ifdef DEBUG_TRACERS
;
; debug hack to print a character with minimal code impact
;
debug_tracer:	pushad
		pushfd
		mov bp,sp
		mov bx,[bp+9*4]		; Get return address
		mov al,[cs:bx]		; Get data byte
		inc word [bp+9*4]	; Return to after data byte
		call writechr
		popfd
		popad
		ret
%endif	; DEBUG_TRACERS

		section .data
%if IS_ISOLINUX == 0			; Defined elsewhere for ISOLINUX
crlf_msg	db CR, LF
null_msg	db 0
%endif
crff_msg	db CR, FF, 0

		section .config
		; This is a word to pc_setint16 can set it
DisplayCon	dw 01h			; Console display enabled

ScrollAttribute	db 07h			; Grey on white (normal text color)

		section .bss
		alignb 2
NextCharJump    resw 1			; Routine to interpret next print char
CursorDX        equ $
CursorCol       resb 1			; Cursor column for message file
CursorRow       resb 1			; Cursor row for message file
ScreenSize      equ $
VidCols         resb 1			; Columns on screen-1
VidRows         resb 1			; Rows on screen-1

; Serial console stuff; don't put this in .config becasue we don't want
; loading a new config file to undo this setting.
		section .data
		alignz 4
SerialPort	dw 0			; Serial port base (or 0 for no serial port)
BaudDivisor	dw 115200/9600		; Baud rate divisor
FlowControl	equ $
FlowOutput	db 0			; Outputs to assert for serial flow
FlowInput	db 0			; Input bits for serial flow
FlowIgnore	db 0			; Ignore input unless these bits set
FlowDummy	db 0			; Unused

		section .bss
TextAttribute   resb 1			; Text attribute for message file
DisplayMask	resb 1			; Display modes mask

%include "serirq.inc"
1	;; -----------------------------------------------------------------------
2	;;
3	;; Copyright 1994-2008 H. Peter Anvin - All Rights Reserved
4	;; Copyright 2009 Intel Corporation; author: H. Peter Anvin
5	;;
6	;; This program is free software; you can redistribute it and/or modify
7	;; it under the terms of the GNU General Public License as published by
8	;; the Free Software Foundation, Inc., 53 Temple Place Ste 330,
9	;; Boston MA 02111-1307, USA; either version 2 of the License, or
10	;; (at your option) any later version; incorporated herein by reference.
11	;;
12	;; -----------------------------------------------------------------------
13
14	;;
15	;; conio.inc
16	;;
17	;; Console I/O code, except:
18	;; writechr, writestr_early - module-dependent
19	;; writestr, crlf - writestr.inc
20	;; writehex* - writehex.inc
21	;;
22
23	;
24	; loadkeys: Load a LILO-style keymap; file is open on the top of the
25	; getc stack.
26	;
27	section .text
28
29	loadkeys:
30	mov cx,256
31	mov di,trackbuf
32	call readc
33	jc .done ; EOF already?
34
35	; Make sure we are at EOF now...
36	call getc
37	jnc .done ; We should be at EOF now!
38
39	; It was okay, we can now move it into the KbdMap
40	mov si,trackbuf
41	mov di,KbdMap
42	mov cx,256 >> 2
43	rep movsd
44
45	.done:
46	call close
47	ret
48
49	;
50	; get_msg_file: Load a text file and write its contents to the screen,
51	; interpreting color codes. Call with the file already
52	; on the top of the open/getc stack.
53	;
54	; Assumes CS == DS == ES.
55	;
56	get_msg_file:
57	mov byte [TextAttribute],07h ; Default grey on white
58	mov byte [DisplayMask],07h ; Display text in all modes
59	call msg_initvars
60
61	print_msg_file:
62	.getc:
63	call getc
64	jc .done
65	cmp al,1Ah ; DOS EOF?
66	je .done
67	movzx cx,byte [UsingVGA]
68	and cl,01h
69	inc cx ; CL <- 01h = text mode,
70	; 02h = graphics mode
71	call [NextCharJump] ; Do what shall be done
72	jmp .getc
73	.done:
74	jmp close ; Tailcall!
75
76	msg_putchar: ; Normal character
77	cmp al,0Fh ; ^O = color code follows
78	je msg_ctrl_o
79	cmp al,0Dh ; Ignore <CR>
80	je msg_ignore
81	cmp al,0Ah ; <LF> = newline
82	je msg_newline
83	cmp al,0Ch ; <FF> = clear screen
84	je msg_formfeed
85	cmp al,07h ; <BEL> = beep
86	je msg_beep
87	cmp al,19h ; <EM> = return to text mode
88	je msg_novga
89	cmp al,18h ; <CAN> = VGA filename follows
90	je msg_vga
91	jnb .not_modectl
92	cmp al,10h ; 10h to 17h are mode controls
93	jae msg_modectl
94	.not_modectl:
95
96	msg_normal: call write_serial_displaymask ; Write to serial port
97	test [DisplayMask],cl
98	jz msg_ignore ; Not screen
99	test byte [DisplayCon],01h
100	jz msg_ignore
101	mov bl,[TextAttribute]
102	mov bh,[BIOS_page]
103	mov ah,09h ; Write character/attribute
104	mov cx,1 ; One character only
105	int 10h ; Write to screen
106	mov al,[CursorCol]
107	inc ax
108	cmp al,[VidCols]
109	ja msg_line_wrap ; Screen wraparound
110	mov [CursorCol],al
111
112	msg_gotoxy: mov bh,[BIOS_page]
113	mov dx,[CursorDX]
114	mov ah,02h ; Set cursor position
115	int 10h
116	msg_ignore: ret
117
118	msg_beep: mov ax,0E07h ; Beep
119	xor bx,bx
120	int 10h
121	ret
122
123	msg_ctrl_o: ; ^O = color code follows
124	mov word [NextCharJump],msg_setbg
125	ret
126	msg_newline: ; Newline char or end of line
127	mov si,crlf_msg
128	call write_serial_str_displaymask
129	msg_line_wrap: ; Screen wraparound
130	test [DisplayMask],cl
131	jz msg_ignore
132	mov byte [CursorCol],0
133	mov al,[CursorRow]
134	inc ax
135	cmp al,[VidRows]
136	ja msg_scroll
137	mov [CursorRow],al
138	jmp short msg_gotoxy
139	msg_scroll: xor cx,cx ; Upper left hand corner
140	mov dx,[ScreenSize]
141	mov [CursorRow],dh ; New cursor at the bottom
142	mov bh,[ScrollAttribute]
143	mov ax,0601h ; Scroll up one line
144	int 10h
145	jmp short msg_gotoxy
146	msg_formfeed: ; Form feed character
147	mov si,crff_msg
148	call write_serial_str_displaymask
149	test [DisplayMask],cl
150	jz msg_ignore
151	xor cx,cx
152	mov [CursorDX],cx ; Upper lefthand corner
153	mov dx,[ScreenSize]
154	mov bh,[TextAttribute]
155	mov ax,0600h ; Clear screen region
156	int 10h
157	jmp msg_gotoxy
158	msg_setbg: ; Color background character
159	call unhexchar
160	jc msg_color_bad
161	shl al,4
162	test [DisplayMask],cl
163	jz .dontset
164	mov [TextAttribute],al
165	.dontset:
166	mov word [NextCharJump],msg_setfg
167	ret
168	msg_setfg: ; Color foreground character
169	call unhexchar
170	jc msg_color_bad
171	test [DisplayMask],cl
172	jz .dontset
173	or [TextAttribute],al ; setbg set foreground to 0
174	.dontset:
175	jmp short msg_putcharnext
176	msg_vga:
177	mov word [NextCharJump],msg_filename
178	mov di, VGAFileBuf
179	jmp short msg_setvgafileptr
180
181	msg_color_bad:
182	mov byte [TextAttribute],07h ; Default attribute
183	msg_putcharnext:
184	mov word [NextCharJump],msg_putchar
185	ret
186
187	msg_filename: ; Getting VGA filename
188	cmp al,0Ah ; <LF> = end of filename
189	je msg_viewimage
190	cmp al,' '
191	jbe msg_ret ; Ignore space/control char
192	mov di,[VGAFilePtr]
193	cmp di,VGAFileBufEnd
194	jnb msg_ret
195	mov [di],al ; Can't use stosb (DS:)
196	inc di
197	msg_setvgafileptr:
198	mov [VGAFilePtr],di
199	msg_ret: ret
200
201	msg_novga:
202	call vgaclearmode
203	jmp short msg_initvars
204
205	msg_viewimage:
206	mov si,[VGAFilePtr]
207	mov byte [si],0 ; Zero-terminate filename
208	mov si,VGAFileBuf
209	mov di,VGAFileMBuf
210	call mangle_name
211	call open
212	jz msg_putcharnext ; Not there
213	call vgadisplayfile
214	; Fall through
215
216	; Subroutine to initialize variables, also needed
217	; after loading a graphics file
218	msg_initvars:
219	pusha
220	mov bh,[BIOS_page]
221	mov ah,03h ; Read cursor position
222	int 10h
223	mov [CursorDX],dx
224	popa
225	jmp short msg_putcharnext ; Initialize state machine
226
227	msg_modectl:
228	and al,07h
229	mov [DisplayMask],al
230	jmp short msg_putcharnext
231
232	;
233	; write_serial: If serial output is enabled, write character on serial port
234	; write_serial_displaymask: d:o, but ignore if DisplayMask & 04h == 0
235	;
236	write_serial_displaymask:
237	test byte [DisplayMask], 04h
238	jz write_serial.end
239	write_serial:
240	pushfd
241	pushad
242	mov bx,[SerialPort]
243	and bx,bx
244	je .noserial
245	push ax
246	mov ah,[FlowInput]
247	.waitspace:
248	; Wait for space in transmit register
249	lea dx,[bx+5] ; DX -> LSR
250	in al,dx
251	test al,20h
252	jz .waitspace
253
254	; Wait for input flow control
255	inc dx ; DX -> MSR
256	in al,dx
257	and al,ah
258	cmp al,ah
259	jne .waitspace
260	.no_flow:
261
262	xchg dx,bx ; DX -> THR
263	pop ax
264	slow_out dx,al ; Send data
265	.noserial: popad
266	popfd
267	.end: ret
268
269	;
270	; write_serial_str: write_serial for strings
271	; write_serial_str_displaymask: d:o, but ignore if DisplayMask & 04h == 0
272	;
273	write_serial_str_displaymask:
274	test byte [DisplayMask], 04h
275	jz write_serial_str.end
276
277	write_serial_str:
278	.loop lodsb
279	and al,al
280	jz .end
281	call write_serial
282	jmp short .loop
283	.end: ret
284
285	;
286	; pollchar: check if we have an input character pending (ZF = 0)
287	;
288	pollchar:
289	pushad
290	mov ah,11h ; Poll keyboard
291	int 16h
292	jnz .done ; Keyboard response
293	mov dx,[SerialPort]
294	and dx,dx
295	jz .done ; No serial port -> no input
296	mov ax,[SerialTail] ; Already-queued input?
297	cli
298	cmp ax,[SerialHead]
299	jne .done_sti ; If so, return ZF = 0
300	add dx,5 ; DX -> LSR
301	in al,dx
302	test al,1 ; ZF = 0 if data pending
303	jz .done_sti
304	inc dx ; DX -> MSR
305	mov ah,[FlowIgnore] ; Required status bits
306	in al,dx
307	and al,ah
308	cmp al,ah
309	setne al
310	dec al ; Set ZF = 0 if equal
311	.done_sti: sti
312	.done: popad
313	ret
314
315	;
316	; getchar: Read a character from keyboard or serial port
317	;
318	getchar.sti_again:
319	sti
320	getchar:
321	.again:
322	call do_idle
323	mov ah,11h ; Poll keyboard
324	int 16h
325	jnz .kbd ; Keyboard input?
326	mov bx,[SerialPort]
327	and bx,bx
328	jz .again
329	mov ax,[SerialTail]
330	cli
331	cmp ax,[SerialHead]
332	jne .serial_queued
333	lea dx,[bx+5] ; DX -> LSR
334	in al,dx
335	test al,1
336	jz .sti_again
337	inc dx ; DX -> MSR
338	mov ah,[FlowIgnore]
339	in al,dx
340	and al,ah
341	cmp al,ah
342	jne .sti_again
343	.serial: xor ah,ah ; Avoid confusion
344	mov dx,bx ; Data port
345	in al,dx ; Read data
346	sti
347	jmp .done
348	.serial_queued:
349	sti ; We already know we'll consume data
350	xchg bx,ax
351	push ds
352	mov ax,aux_seg + (aux.serial >> 4)
353	mov ds,ax
354	mov al,[bx]
355	pop ds
356	inc bx
357	and bx,serial_buf_size-1
358	mov [SerialTail],bx
359	jmp .done
360
361	.kbd: mov ah,10h ; Get keyboard input
362	int 16h
363	cmp al,0E0h
364	jnz .not_ext
365	xor al,al
366	.not_ext:
367	and al,al
368	jz .func_key
369	mov bx,KbdMap ; Convert character sets
370	xlatb
371	.func_key:
372	.done:
373	jmp reset_idle ; Character received
374
375	%ifdef DEBUG_TRACERS
376	;
377	; debug hack to print a character with minimal code impact
378	;
379	debug_tracer: pushad
380	pushfd
381	mov bp,sp
382	mov bx,[bp+9*4] ; Get return address
383	mov al,[cs:bx] ; Get data byte
384	inc word [bp+9*4] ; Return to after data byte
385	call writechr
386	popfd
387	popad
388	ret
389	%endif ; DEBUG_TRACERS
390
391	section .data
392	%if IS_ISOLINUX == 0 ; Defined elsewhere for ISOLINUX
393	crlf_msg db CR, LF
394	null_msg db 0
395	%endif
396	crff_msg db CR, FF, 0
397
398	section .config
399	; This is a word to pc_setint16 can set it
400	DisplayCon dw 01h ; Console display enabled
401
402	ScrollAttribute db 07h ; Grey on white (normal text color)
403
404	section .bss
405	alignb 2
406	NextCharJump resw 1 ; Routine to interpret next print char
407	CursorDX equ $
408	CursorCol resb 1 ; Cursor column for message file
409	CursorRow resb 1 ; Cursor row for message file
410	ScreenSize equ $
411	VidCols resb 1 ; Columns on screen-1
412	VidRows resb 1 ; Rows on screen-1
413
414	; Serial console stuff; don't put this in .config becasue we don't want
415	; loading a new config file to undo this setting.
416	section .data
417	alignz 4
418	SerialPort dw 0 ; Serial port base (or 0 for no serial port)
419	BaudDivisor dw 115200/9600 ; Baud rate divisor
420	FlowControl equ $
421	FlowOutput db 0 ; Outputs to assert for serial flow
422	FlowInput db 0 ; Input bits for serial flow
423	FlowIgnore db 0 ; Ignore input unless these bits set
424	FlowDummy db 0 ; Unused
425
426	section .bss
427	TextAttribute resb 1 ; Text attribute for message file
428	DisplayMask resb 1 ; Display modes mask
429
430	%include "serirq.inc"