VGA EDID Emulator In a Nutshell

1163 War n er Av e  T u sti n , C A 92 780  (7 14) 64 1- 6 607 
www.hallresearch.com
VGA EDID Emulator
In a Nutshell
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The EM-EDID-HD15 is a VGA EDID emulator. It passes all the video signals across
with the exception of the DDC (Display Data Channel)
The DDC from the downstream device (typically a monitor) is NOT passed across to
the source. Instead an EEPROM in the emulator provides a fixed EDID table to the
source.
The EDID table reported to the source is comprised of 128 bytes. On the next page
you can see the raw (hex or binary) format and deciphered/decoded in English
As sold, the user cannot change the EDID table that is in the emulator (but for a user
willing to manage their own EDID files, we offer USB programmers or other EDID
emulators that are programmable or have the ability to learn the EDID from a
display). If a user has a particular EDID file that they can supply, Hall Research can
pre-load the user supplied EDID data in the emulator (setup fee and/or minimum
order quantity requirements apply, please contact your sales representative)
The EDID emulator has an LED to indicate power. Power is usually supplied from
the VGA source (pin9 must have 5v according to VESA specifications). The EDID
emulator uses only a few milliamps, so if there is power on pin 9 it will work. If the
power LED does not turn on, it means that the source is not compliant with VESA
specs. In that case a regulated 5v can be plugged to the EM-EDID-HD15 (power
supply sold separately)
Hall Research makes no guarantees or claims as to how any particular source will
interpret and react to the EDID supplied. How a source deals with EDID is a function
of many variables including but not limited to:
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Firmware or Chipset in the video output card
Memory of video output card
Operating system
Hardware platform
Hall Research cannot guarantee that a source will output video at any particular
resolution, or at all for that matter with the use of the emulator. The only thing the
emulator guarantees is that the source will be able to read the "canned" EDID table
in the emulator.
Copyright 2014 Hall Research
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HR_EDID_VGA_V2.0
Block 0 (EDID Base Block)
0
1
2
000 | 00 FF FF
010 | 00 02 00
020 | 68 00 00
030 | 99 26 0F
040 | 81 00 81
050 | B3 00 D1
060 | 1C 20 40
070 | 00 1E D8
080 | 30 68 34
090 | 00 00 00
100 | 00 00 00
110 | 00 FA 00
120 | 00 01 00
3
FF
00
8C
50
99
C0
80
18
00
FD
00
D1
01
4
FF
00
EE
54
8C
2E
35
00
00
00
00
00
00
5
FF
00
EE
FF
C0
1D
00
30
00
32
00
E1
0A
6
FF
0B
91
FF
95
00
00
41
00
55
00
C0
00
7
00
16
A3
80
00
80
00
00
00
1E
00
E1
BC
8
22
01
54
81
A9
51
00
1E
00
A0
00
40
9
49
03
4C
C0
C0
D0
00
30
18
10
00
01
Following is a translation of Block 0 mapping into English
(Numbers in parenthesis represent byte positions)
(8-9)
(10-11)
(12-15)
(16)
(17)
ID Manufacture Name
ID Product Code
ID Serial Number
Week of Manufacture
Year of Manufacture
(18)
(19)
EDID Version Number : 1
EDID Revision Number: 3
(20)
Video Input Definition: Analog
0.700, 0.000 (0.700 V p-p)
Separate Syncs
(21)
(22)
(23)
(24)
Maximum Horizontal Image Size: 0 cm
Maximum Vertical Image Size : 0 cm
Display Gamma
: 2.40
Power Management and Supported Feature(s):
Standby, Suspend, Active Off/Very Low Power, RGB Color, sRGB,
Preferred Timing Mode
(25-34)
Color Characteristics
Red Chromaticity
:
Green Chromaticity :
Blue Chromaticity :
Default White Point:
(35)
Established Timings I
720
720
640
640
x
x
x
x
400
400
480
480
@
@
@
@
70Hz
88Hz
60Hz
67Hz
Copyright 2014 Hall Research
:
:
:
:
:
HRI
0200
0
11
2012
Rx
Gx
Bx
Wx
=
=
=
=
0.636
0.300
0.150
0.312
Ry
Gy
By
Wy
=
=
=
=
0.330
0.596
0.056
0.329
(IBM, VGA)
(IBM, XGA2)
(IBM, VGA)
(Apple, Mac II)
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640
640
800
800
(36)
x
x
x
x
480
480
600
600
@
@
@
@
72Hz
75Hz
56Hz
60Hz
(VESA)
(VESA)
(VESA)
(VESA)
Established Timings II
800 x 600 @ 72Hz (VESA)
800 x 600 @ 75Hz (VESA)
832 x 624 @ 75Hz (Apple, Mac II)
1024 x 768 @ 87Hz(I) (IBM)
1024 x 768 @ 60Hz (VESA)
1024 x 768 @ 70Hz(VESA)
1024 x 768 @ 75Hz (VESA)
1280 x 1024 @ 75Hz (VESA)
(37)
Manufacturer's Timings
1152 x 870 @ 75Hz (Apple, Mac II)
(38-53)
Standard Timings
1280x720 @ 60 Hz (16:9 Aspect Ratio)
1280x800 @ 60 Hz (16:10 Aspect Ratio)
1280x1024 @ 85 Hz (5:4 Aspect Ratio)
1368x769 @ 60 Hz (16:9 Aspect Ratio)
1440x900 @ 60 Hz (16:10 Aspect Ratio)
1600x900 @ 60 Hz (16:9 Aspect Ratio)
1680x1050 @ 60 Hz (16:10 Aspect Ratio)
1920x1080 @ 60 Hz (16:9 Aspect Ratio)
(54-71)
Detailed Descriptor #1: Preferred Timing (1280x720 @ 60Hz)
Pixel Clock
: 74.7 MHz
Horizontal Image Size : 0 mm
Vertical Image Size
: 0 mm
Refresh Mode
: Non-interlaced
Normal Display, No Stereo
Horizontal:
Active Time
:
Blanking Time
:
Sync Offset
:
Sync Pulse Width:
Border
:
Frequency
:
1280 Pixels
384 Pixels
64 Pixels
128 Pixels
0 Pixels
44 kHz
Vertical:
Active Time
:
Blanking Time
:
Sync Offset
:
Sync Pulse Width:
Border
:
720 Lines
28 Lines
3 Lines
5 Lines
0 Lines
Digital Separate, Horizontal Polarity (+), Vertical Polarity (+)
Modeline: "1280x720" 74.700 1280 1344 1472 1664 720 723 728 748
+hsync +vsync
Copyright 2014 Hall Research
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(72-89)
Detailed Descriptor #2: Detailed Timing (1024x768 @ 60Hz)
Pixel Clock
: 63.6 MHz
Horizontal Image Size : 0 mm
Vertical Image Size
: 0 mm
Refresh Mode
: Non-interlaced
Normal Display, No Stereo
Horizontal:
Active Time
:
Blanking Time
:
Sync Offset
:
Sync Pulse Width:
Border
:
Frequency
:
1024 Pixels
304 Pixels
48 Pixels
104 Pixels
0 Pixels
47 kHz
Vertical:
Active Time
:
Blanking Time
:
Sync Offset
:
Sync Pulse Width:
Border
:
768 Lines
30 Lines
3 Lines
4 Lines
0 Lines
Digital Separate, Horizontal Polarity (-), Vertical Polarity (-)
Modeline: "1024x768" 63.600 1024 1072 1176 1328 768 771 775 798
-hsync -vsync
(90-107)
Detailed Descriptor #3: Monitor Range Limits
Horizontal Scan Range:
Vertical Scan Range :
Supported Pixel Clock:
Secondary GTF
:
30kHz-160kHz
50Hz-85Hz
160 MHz
Not Supported
(108-125)
Detailed Descriptor #4: Standard Timing Identifications
(113-124)
Standard Timings
1920x1200 @ 60 Hz (16:10 Aspect Ratio)
2048x1152 @ 60 Hz (16:9 Aspect Ratio)
2048x1536 @ 60 Hz (4:3 Aspect Ratio)
(126-127)
Extension Flag and Checksum
Extension Block(s)
Checksum Value
Copyright 2014 Hall Research
: 0
: 188
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