[GitHub/mt8127/android_kernel_alcatel_ttab.git] / Documentation / EDID / edid.S

/*
   edid.S: EDID data template

   Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org>

   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; either version 2
   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
*/


/* Manufacturer */
#define MFG_LNX1 'L'
#define MFG_LNX2 'N'
#define MFG_LNX3 'X'
#define SERIAL 0
#define YEAR 2012
#define WEEK 5

/* EDID 1.3 standard definitions */
#define XY_RATIO_16_10	0b00
#define XY_RATIO_4_3	0b01
#define XY_RATIO_5_4	0b10
#define XY_RATIO_16_9	0b11

#define mfgname2id(v1,v2,v3) \
	((((v1-'@')&0x1f)<<10)+(((v2-'@')&0x1f)<<5)+((v3-'@')&0x1f))
#define swap16(v1) ((v1>>8)+((v1&0xff)<<8))
#define msbs2(v1,v2) ((((v1>>8)&0x0f)<<4)+((v2>>8)&0x0f))
#define msbs4(v1,v2,v3,v4) \
	(((v1&0x03)>>2)+((v2&0x03)>>4)+((v3&0x03)>>6)+((v4&0x03)>>8))
#define pixdpi2mm(pix,dpi) ((pix*25)/dpi)
#define xsize pixdpi2mm(XPIX,DPI)
#define ysize pixdpi2mm(YPIX,DPI)

		.data

/* Fixed header pattern */
header:		.byte	0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x00

mfg_id:		.word	swap16(mfgname2id(MFG_LNX1, MFG_LNX2, MFG_LNX3))

prod_code:	.word	0

/* Serial number. 32 bits, little endian. */
serial_number:	.long	SERIAL

/* Week of manufacture */
week:		.byte	WEEK

/* Year of manufacture, less 1990. (1990-2245)
   If week=255, it is the model year instead */
year:		.byte	YEAR-1990

version:	.byte	VERSION 	/* EDID version, usually 1 (for 1.3) */
revision:	.byte	REVISION	/* EDID revision, usually 3 (for 1.3) */

/* If Bit 7=1	Digital input. If set, the following bit definitions apply:
     Bits 6-1	Reserved, must be 0
     Bit 0	Signal is compatible with VESA DFP 1.x TMDS CRGB,
		  1 pixel per clock, up to 8 bits per color, MSB aligned,
   If Bit 7=0	Analog input. If clear, the following bit definitions apply:
     Bits 6-5	Video white and sync levels, relative to blank
		  00=+0.7/-0.3 V; 01=+0.714/-0.286 V;
		  10=+1.0/-0.4 V; 11=+0.7/0 V
   Bit 4	Blank-to-black setup (pedestal) expected
   Bit 3	Separate sync supported
   Bit 2	Composite sync (on HSync) supported
   Bit 1	Sync on green supported
   Bit 0	VSync pulse must be serrated when somposite or
		  sync-on-green is used. */
video_parms:	.byte	0x6d

/* Maximum horizontal image size, in centimetres
   (max 292 cm/115 in at 16:9 aspect ratio) */
max_hor_size:	.byte	xsize/10

/* Maximum vertical image size, in centimetres.
   If either byte is 0, undefined (e.g. projector) */
max_vert_size:	.byte	ysize/10

/* Display gamma, minus 1, times 100 (range 1.00-3.5 */
gamma:		.byte	120

/* Bit 7	DPMS standby supported
   Bit 6	DPMS suspend supported
   Bit 5	DPMS active-off supported
   Bits 4-3	Display type: 00=monochrome; 01=RGB colour;
		  10=non-RGB multicolour; 11=undefined
   Bit 2	Standard sRGB colour space. Bytes 25-34 must contain
		  sRGB standard values.
   Bit 1	Preferred timing mode specified in descriptor block 1.
   Bit 0	GTF supported with default parameter values. */
dsp_features:	.byte	0xea

/* Chromaticity coordinates. */
/* Red and green least-significant bits
   Bits 7-6	Red x value least-significant 2 bits
   Bits 5-4	Red y value least-significant 2 bits
   Bits 3-2	Green x value lst-significant 2 bits
   Bits 1-0	Green y value least-significant 2 bits */
red_green_lsb:	.byte	0x5e

/* Blue and white least-significant 2 bits */
blue_white_lsb:	.byte	0xc0

/* Red x value most significant 8 bits.
   0-255 encodes 0-0.996 (255/256); 0-0.999 (1023/1024) with lsbits */
red_x_msb:	.byte	0xa4

/* Red y value most significant 8 bits */
red_y_msb:	.byte	0x59

/* Green x and y value most significant 8 bits */
green_x_y_msb:	.byte	0x4a,0x98

/* Blue x and y value most significant 8 bits */
blue_x_y_msb:	.byte	0x25,0x20

/* Default white point x and y value most significant 8 bits */
white_x_y_msb:	.byte	0x50,0x54

/* Established timings */
/* Bit 7	720x400 @ 70 Hz
   Bit 6	720x400 @ 88 Hz
   Bit 5	640x480 @ 60 Hz
   Bit 4	640x480 @ 67 Hz
   Bit 3	640x480 @ 72 Hz
   Bit 2	640x480 @ 75 Hz
   Bit 1	800x600 @ 56 Hz
   Bit 0	800x600 @ 60 Hz */
estbl_timing1:	.byte	0x00

/* Bit 7	800x600 @ 72 Hz
   Bit 6	800x600 @ 75 Hz
   Bit 5	832x624 @ 75 Hz
   Bit 4	1024x768 @ 87 Hz, interlaced (1024x768)
   Bit 3	1024x768 @ 60 Hz
   Bit 2	1024x768 @ 72 Hz
   Bit 1	1024x768 @ 75 Hz
   Bit 0	1280x1024 @ 75 Hz */
estbl_timing2:	.byte	ESTABLISHED_TIMINGS_BITS

/* Bit 7	1152x870 @ 75 Hz (Apple Macintosh II)
   Bits 6-0 	Other manufacturer-specific display mod */
estbl_timing3:	.byte	0x00

/* Standard timing */
/* X resolution, less 31, divided by 8 (256-2288 pixels) */
std_xres:	.byte	(XPIX/8)-31
/* Y resolution, X:Y pixel ratio
   Bits 7-6	X:Y pixel ratio: 00=16:10; 01=4:3; 10=5:4; 11=16:9.
   Bits 5-0	Vertical frequency, less 60 (60-123 Hz) */
std_vres:	.byte	(XY_RATIO<<6)+VFREQ-60
		.fill	7,2,0x0101	/* Unused */

descriptor1:
/* Pixel clock in 10 kHz units. (0.-655.35 MHz, little-endian) */
clock:		.word	CLOCK/10

/* Horizontal active pixels 8 lsbits (0-4095) */
x_act_lsb:	.byte	XPIX&0xff
/* Horizontal blanking pixels 8 lsbits (0-4095)
   End of active to start of next active. */
x_blk_lsb:	.byte	XBLANK&0xff
/* Bits 7-4 	Horizontal active pixels 4 msbits
   Bits 3-0	Horizontal blanking pixels 4 msbits */
x_msbs:		.byte	msbs2(XPIX,XBLANK)

/* Vertical active lines 8 lsbits (0-4095) */
y_act_lsb:	.byte	YPIX&0xff
/* Vertical blanking lines 8 lsbits (0-4095) */
y_blk_lsb:	.byte	YBLANK&0xff
/* Bits 7-4 	Vertical active lines 4 msbits
   Bits 3-0 	Vertical blanking lines 4 msbits */
y_msbs:		.byte	msbs2(YPIX,YBLANK)

/* Horizontal sync offset pixels 8 lsbits (0-1023) From blanking start */
x_snc_off_lsb:	.byte	XOFFSET&0xff
/* Horizontal sync pulse width pixels 8 lsbits (0-1023) */
x_snc_pls_lsb:	.byte	XPULSE&0xff
/* Bits 7-4 	Vertical sync offset lines 4 lsbits -63)
   Bits 3-0 	Vertical sync pulse width lines 4 lsbits -63) */
y_snc_lsb:	.byte	((YOFFSET-63)<<4)+(YPULSE-63)
/* Bits 7-6 	Horizontal sync offset pixels 2 msbits
   Bits 5-4 	Horizontal sync pulse width pixels 2 msbits
   Bits 3-2 	Vertical sync offset lines 2 msbits
   Bits 1-0 	Vertical sync pulse width lines 2 msbits */
xy_snc_msbs:	.byte	msbs4(XOFFSET,XPULSE,YOFFSET,YPULSE)

/* Horizontal display size, mm, 8 lsbits (0-4095 mm, 161 in) */
x_dsp_size:	.byte	xsize&0xff

/* Vertical display size, mm, 8 lsbits (0-4095 mm, 161 in) */
y_dsp_size:	.byte	ysize&0xff

/* Bits 7-4 	Horizontal display size, mm, 4 msbits
   Bits 3-0 	Vertical display size, mm, 4 msbits */
dsp_size_mbsb:	.byte	msbs2(xsize,ysize)

/* Horizontal border pixels (each side; total is twice this) */
x_border:	.byte	0
/* Vertical border lines (each side; total is twice this) */
y_border:	.byte	0

/* Bit 7 	Interlaced
   Bits 6-5 	Stereo mode: 00=No stereo; other values depend on bit 0:
   Bit 0=0: 01=Field sequential, sync=1 during right; 10=similar,
     sync=1 during left; 11=4-way interleaved stereo
   Bit 0=1 2-way interleaved stereo: 01=Right image on even lines;
     10=Left image on even lines; 11=side-by-side
   Bits 4-3 	Sync type: 00=Analog composite; 01=Bipolar analog composite;
     10=Digital composite (on HSync); 11=Digital separate
   Bit 2 	If digital separate: Vertical sync polarity (1=positive)
   Other types: VSync serrated (HSync during VSync)
   Bit 1 	If analog sync: Sync on all 3 RGB lines (else green only)
   Digital: HSync polarity (1=positive)
   Bit 0 	2-way line-interleaved stereo, if bits 4-3 are not 00. */
features:	.byte	0x18+(VSYNC_POL<<2)+(HSYNC_POL<<1)

descriptor2:	.byte	0,0	/* Not a detailed timing descriptor */
		.byte	0	/* Must be zero */
		.byte	0xff	/* Descriptor is monitor serial number (text) */
		.byte	0	/* Must be zero */
start1:		.ascii	"Linux #0"
end1:		.byte	0x0a	/* End marker */
		.fill	12-(end1-start1), 1, 0x20 /* Padded spaces */
descriptor3:	.byte	0,0	/* Not a detailed timing descriptor */
		.byte	0	/* Must be zero */
		.byte	0xfd	/* Descriptor is monitor range limits */
		.byte	0	/* Must be zero */
start2:		.byte	VFREQ-1	/* Minimum vertical field rate (1-255 Hz) */
		.byte	VFREQ+1	/* Maximum vertical field rate (1-255 Hz) */
		.byte	(CLOCK/(XPIX+XBLANK))-1 /* Minimum horizontal line rate
						    (1-255 kHz) */
		.byte	(CLOCK/(XPIX+XBLANK))+1 /* Maximum horizontal line rate
						    (1-255 kHz) */
		.byte	(CLOCK/10000)+1	/* Maximum pixel clock rate, rounded up
					   to 10 MHz multiple (10-2550 MHz) */
		.byte	0	/* No extended timing information type */
end2:		.byte	0x0a	/* End marker */
		.fill	12-(end2-start2), 1, 0x20 /* Padded spaces */
descriptor4:	.byte	0,0	/* Not a detailed timing descriptor */
		.byte	0	/* Must be zero */
		.byte	0xfc	/* Descriptor is text */
		.byte	0	/* Must be zero */
start3:		.ascii	TIMING_NAME
end3:		.byte	0x0a	/* End marker */
		.fill	12-(end3-start3), 1, 0x20 /* Padded spaces */
extensions:	.byte	0	/* Number of extensions to follow */
checksum:	.byte	CRC	/* Sum of all bytes must be 0 */
Commit	Line	Data
da0df92b CE	1	/*
	2	edid.S: EDID data template
	3
	4	Copyright (C) 2012 Carsten Emde <C.Emde@osadl.org>
	5
	6	This program is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU General Public License
	8	as published by the Free Software Foundation; either version 2
	9	of the License, or (at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	19	*/
	20
	21
	22	/* Manufacturer */
	23	#define MFG_LNX1 'L'
	24	#define MFG_LNX2 'N'
	25	#define MFG_LNX3 'X'
	26	#define SERIAL 0
	27	#define YEAR 2012
	28	#define WEEK 5
	29
	30	/* EDID 1.3 standard definitions */
	31	#define XY_RATIO_16_10 0b00
	32	#define XY_RATIO_4_3 0b01
	33	#define XY_RATIO_5_4 0b10
	34	#define XY_RATIO_16_9 0b11
	35
	36	#define mfgname2id(v1,v2,v3) \
	37	((((v1-'@')&0x1f)<<10)+(((v2-'@')&0x1f)<<5)+((v3-'@')&0x1f))
	38	#define swap16(v1) ((v1>>8)+((v1&0xff)<<8))
	39	#define msbs2(v1,v2) ((((v1>>8)&0x0f)<<4)+((v2>>8)&0x0f))
	40	#define msbs4(v1,v2,v3,v4) \
	41	(((v1&0x03)>>2)+((v2&0x03)>>4)+((v3&0x03)>>6)+((v4&0x03)>>8))
	42	#define pixdpi2mm(pix,dpi) ((pix*25)/dpi)
	43	#define xsize pixdpi2mm(XPIX,DPI)
	44	#define ysize pixdpi2mm(YPIX,DPI)
	45
	46	.data
	47
	48	/* Fixed header pattern */
	49	header: .byte 0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x00
	50
	51	mfg_id: .word swap16(mfgname2id(MFG_LNX1, MFG_LNX2, MFG_LNX3))
	52
	53	prod_code: .word 0
	54
	55	/* Serial number. 32 bits, little endian. */
	56	serial_number: .long SERIAL
	57
	58	/* Week of manufacture */
	59	week: .byte WEEK
	60
	61	/* Year of manufacture, less 1990. (1990-2245)
	62	If week=255, it is the model year instead */
	63	year: .byte YEAR-1990
	64
65	version: .byte VERSION /* EDID version, usually 1 (for 1.3) */
66	revision: .byte REVISION /* EDID revision, usually 3 (for 1.3) */
67
68	/* If Bit 7=1 Digital input. If set, the following bit definitions apply:
69	Bits 6-1 Reserved, must be 0
70	Bit 0 Signal is compatible with VESA DFP 1.x TMDS CRGB,
71	1 pixel per clock, up to 8 bits per color, MSB aligned,
72	If Bit 7=0 Analog input. If clear, the following bit definitions apply:
73	Bits 6-5 Video white and sync levels, relative to blank
74	00=+0.7/-0.3 V; 01=+0.714/-0.286 V;
75	10=+1.0/-0.4 V; 11=+0.7/0 V
76	Bit 4 Blank-to-black setup (pedestal) expected
77	Bit 3 Separate sync supported
78	Bit 2 Composite sync (on HSync) supported
79	Bit 1 Sync on green supported
80	Bit 0 VSync pulse must be serrated when somposite or
81	sync-on-green is used. */
82	video_parms: .byte 0x6d
83
84	/* Maximum horizontal image size, in centimetres
85	(max 292 cm/115 in at 16:9 aspect ratio) */
86	max_hor_size: .byte xsize/10
87
88	/* Maximum vertical image size, in centimetres.
89	If either byte is 0, undefined (e.g. projector) */
90	max_vert_size: .byte ysize/10
91
92	/* Display gamma, minus 1, times 100 (range 1.00-3.5 */
93	gamma: .byte 120
94
95	/* Bit 7 DPMS standby supported
96	Bit 6 DPMS suspend supported
97	Bit 5 DPMS active-off supported
98	Bits 4-3 Display type: 00=monochrome; 01=RGB colour;
99	10=non-RGB multicolour; 11=undefined
100	Bit 2 Standard sRGB colour space. Bytes 25-34 must contain
101	sRGB standard values.
102	Bit 1 Preferred timing mode specified in descriptor block 1.
103	Bit 0 GTF supported with default parameter values. */
104	dsp_features: .byte 0xea
105
106	/* Chromaticity coordinates. */
107	/* Red and green least-significant bits
108	Bits 7-6 Red x value least-significant 2 bits
109	Bits 5-4 Red y value least-significant 2 bits
110	Bits 3-2 Green x value lst-significant 2 bits
111	Bits 1-0 Green y value least-significant 2 bits */
112	red_green_lsb: .byte 0x5e
113
114	/* Blue and white least-significant 2 bits */
115	blue_white_lsb: .byte 0xc0
116
117	/* Red x value most significant 8 bits.
118	0-255 encodes 0-0.996 (255/256); 0-0.999 (1023/1024) with lsbits */
119	red_x_msb: .byte 0xa4
120
121	/* Red y value most significant 8 bits */
122	red_y_msb: .byte 0x59
123
124	/* Green x and y value most significant 8 bits */
125	green_x_y_msb: .byte 0x4a,0x98
126
127	/* Blue x and y value most significant 8 bits */
128	blue_x_y_msb: .byte 0x25,0x20
129
130	/* Default white point x and y value most significant 8 bits */
131	white_x_y_msb: .byte 0x50,0x54
132
133	/* Established timings */
134	/* Bit 7 720x400 @ 70 Hz
135	Bit 6 720x400 @ 88 Hz
136	Bit 5 640x480 @ 60 Hz
137	Bit 4 640x480 @ 67 Hz
138	Bit 3 640x480 @ 72 Hz
139	Bit 2 640x480 @ 75 Hz
140	Bit 1 800x600 @ 56 Hz
141	Bit 0 800x600 @ 60 Hz */
142	estbl_timing1: .byte 0x00
143
144	/* Bit 7 800x600 @ 72 Hz
145	Bit 6 800x600 @ 75 Hz
146	Bit 5 832x624 @ 75 Hz
147	Bit 4 1024x768 @ 87 Hz, interlaced (1024x768)
148	Bit 3 1024x768 @ 60 Hz
149	Bit 2 1024x768 @ 72 Hz
150	Bit 1 1024x768 @ 75 Hz
151	Bit 0 1280x1024 @ 75 Hz */
152	estbl_timing2: .byte ESTABLISHED_TIMINGS_BITS
153
154	/* Bit 7 1152x870 @ 75 Hz (Apple Macintosh II)
155	Bits 6-0 Other manufacturer-specific display mod */
156	estbl_timing3: .byte 0x00
157
158	/* Standard timing */
159	/* X resolution, less 31, divided by 8 (256-2288 pixels) */
160	std_xres: .byte (XPIX/8)-31
161	/* Y resolution, X:Y pixel ratio
162	Bits 7-6 X:Y pixel ratio: 00=16:10; 01=4:3; 10=5:4; 11=16:9.
163	Bits 5-0 Vertical frequency, less 60 (60-123 Hz) */
164	std_vres: .byte (XY_RATIO<<6)+VFREQ-60
165	.fill 7,2,0x0101 /* Unused */
166
167	descriptor1:
168	/* Pixel clock in 10 kHz units. (0.-655.35 MHz, little-endian) */
169	clock: .word CLOCK/10
170
171	/* Horizontal active pixels 8 lsbits (0-4095) */
172	x_act_lsb: .byte XPIX&0xff
173	/* Horizontal blanking pixels 8 lsbits (0-4095)
174	End of active to start of next active. */
175	x_blk_lsb: .byte XBLANK&0xff
176	/* Bits 7-4 Horizontal active pixels 4 msbits
177	Bits 3-0 Horizontal blanking pixels 4 msbits */
178	x_msbs: .byte msbs2(XPIX,XBLANK)
179
180	/* Vertical active lines 8 lsbits (0-4095) */
181	y_act_lsb: .byte YPIX&0xff
182	/* Vertical blanking lines 8 lsbits (0-4095) */
183	y_blk_lsb: .byte YBLANK&0xff
184	/* Bits 7-4 Vertical active lines 4 msbits
185	Bits 3-0 Vertical blanking lines 4 msbits */
186	y_msbs: .byte msbs2(YPIX,YBLANK)
187
188	/* Horizontal sync offset pixels 8 lsbits (0-1023) From blanking start */
189	x_snc_off_lsb: .byte XOFFSET&0xff
190	/* Horizontal sync pulse width pixels 8 lsbits (0-1023) */
191	x_snc_pls_lsb: .byte XPULSE&0xff
192	/* Bits 7-4 Vertical sync offset lines 4 lsbits -63)
193	Bits 3-0 Vertical sync pulse width lines 4 lsbits -63) */
194	y_snc_lsb: .byte ((YOFFSET-63)<<4)+(YPULSE-63)
195	/* Bits 7-6 Horizontal sync offset pixels 2 msbits
196	Bits 5-4 Horizontal sync pulse width pixels 2 msbits
197	Bits 3-2 Vertical sync offset lines 2 msbits
198	Bits 1-0 Vertical sync pulse width lines 2 msbits */
199	xy_snc_msbs: .byte msbs4(XOFFSET,XPULSE,YOFFSET,YPULSE)
200
201	/* Horizontal display size, mm, 8 lsbits (0-4095 mm, 161 in) */
202	x_dsp_size: .byte xsize&0xff
203
204	/* Vertical display size, mm, 8 lsbits (0-4095 mm, 161 in) */
205	y_dsp_size: .byte ysize&0xff
206
207	/* Bits 7-4 Horizontal display size, mm, 4 msbits
208	Bits 3-0 Vertical display size, mm, 4 msbits */
209	dsp_size_mbsb: .byte msbs2(xsize,ysize)
210
211	/* Horizontal border pixels (each side; total is twice this) */
212	x_border: .byte 0
213	/* Vertical border lines (each side; total is twice this) */
214	y_border: .byte 0
215
216	/* Bit 7 Interlaced
217	Bits 6-5 Stereo mode: 00=No stereo; other values depend on bit 0:
218	Bit 0=0: 01=Field sequential, sync=1 during right; 10=similar,
219	sync=1 during left; 11=4-way interleaved stereo
220	Bit 0=1 2-way interleaved stereo: 01=Right image on even lines;
221	10=Left image on even lines; 11=side-by-side
222	Bits 4-3 Sync type: 00=Analog composite; 01=Bipolar analog composite;
223	10=Digital composite (on HSync); 11=Digital separate
224	Bit 2 If digital separate: Vertical sync polarity (1=positive)
225	Other types: VSync serrated (HSync during VSync)
226	Bit 1 If analog sync: Sync on all 3 RGB lines (else green only)
227	Digital: HSync polarity (1=positive)
228	Bit 0 2-way line-interleaved stereo, if bits 4-3 are not 00. */
229	features: .byte 0x18+(VSYNC_POL<<2)+(HSYNC_POL<<1)
230
231	descriptor2: .byte 0,0 /* Not a detailed timing descriptor */
232	.byte 0 /* Must be zero */
233	.byte 0xff /* Descriptor is monitor serial number (text) */
234	.byte 0 /* Must be zero */
235	start1: .ascii "Linux #0"
236	end1: .byte 0x0a /* End marker */
237	.fill 12-(end1-start1), 1, 0x20 /* Padded spaces */
238	descriptor3: .byte 0,0 /* Not a detailed timing descriptor */
239	.byte 0 /* Must be zero */
240	.byte 0xfd /* Descriptor is monitor range limits */
241	.byte 0 /* Must be zero */
242	start2: .byte VFREQ-1 /* Minimum vertical field rate (1-255 Hz) */
243	.byte VFREQ+1 /* Maximum vertical field rate (1-255 Hz) */
244	.byte (CLOCK/(XPIX+XBLANK))-1 /* Minimum horizontal line rate
245	(1-255 kHz) */
246	.byte (CLOCK/(XPIX+XBLANK))+1 /* Maximum horizontal line rate
247	(1-255 kHz) */
248	.byte (CLOCK/10000)+1 /* Maximum pixel clock rate, rounded up
249	to 10 MHz multiple (10-2550 MHz) */
250	.byte 0 /* No extended timing information type */
251	end2: .byte 0x0a /* End marker */
252	.fill 12-(end2-start2), 1, 0x20 /* Padded spaces */
253	descriptor4: .byte 0,0 /* Not a detailed timing descriptor */
254	.byte 0 /* Must be zero */
255	.byte 0xfc /* Descriptor is text */
256	.byte 0 /* Must be zero */
257	start3: .ascii TIMING_NAME
258	end3: .byte 0x0a /* End marker */
259	.fill 12-(end3-start3), 1, 0x20 /* Padded spaces */
260	extensions: .byte 0 /* Number of extensions to follow */
261	checksum: .byte CRC /* Sum of all bytes must be 0 */