TurboGXplus Supported Monitors

Table 1-1 shows the list of monitors supported by the TurboGXplus card.

Table 1-1

Sun Part Model....Number...Type/Size/FCC	Monitor ID Sense Code	Standard Resolution and Refresh Rate
X248A.....365-1068-01 Color 21"	2	1280 . 1024 at 76 Hz
GDM-20D10..365-1167-01 Color 20"	4	1152 . 900 at 76 Hz 1152 . 900 at 66 Hz 1280 . 1024 at 67 Hz 1280 . 1024 at 76 Hz
GDM-1955A15 365-1081-01 Color 19"	3	1152 . 900 at 66 Hz
GDM-1962...365-1095-01 Color 19"	4	1152 . 900 at 76 Hz 1152 . 900 at 66 Hz 1280 . 1024 at 67 Hz
GDM-1962B..365-1160-01 Color 19"	4	1152 . 900 at 76 Hz 1152 . 900 at 66 Hz 1280 . 1024 at 67 Hz
GDM-1604A15 365-1079-01 Color 16"	3	1152 . 900 at 66 Hz
GDM-1662B..365-11593-01 Color 16"	6	1152 . 900 at 76 Hz 1152 . 900 at 66 Hz
CPD-1790...365-1151-01 Color 16"	3	1152 . 900 at 66 Hz 1024 . 768 at 77 Hz
X449.....365-1286-01 Color 15"	0	1024 . 768 at 77 Hz
GDM-20S5...365-1168-01 Greyscale 20"	2 or 4*	1280 . 1024 at 76 Hz or 1152 . 900 at 76 Hz 1280 . 1024 at 67 Hz
17SMM4 A..365-1100-01 Grayscale 17"	6	1152 . 900 at 76 Hz
M20P110...365-1099-01 Grayscale 19"	4	1152 . 900 at 76 Hz
Non-Sun...--......Unknown	7	1152 . 900 at 66 Hz
Resolutions in bold type are the default resolution at power-on initialization. * Monitor ID sense code is user-selectable by switch on rear.

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Note - The monitors listed in Table 1-1 are subject to change as Sun Microsystems^(R) announces new monitors. Contact your local Sun representative for a listing of supported monitors.

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Default Screen Resolutions

Table 1-2 lists the default screen resolutions by monitor ID sense code.

Table 1-2

Code	Screen Resolution
7	1152 . 900 at 66 Hz
6	1152 . 900 at 76 Hz
5	1024 .x 768 at 60 Hz
4	1152 . 900 at 76 Hz
3	1152 . 900 at 66 Hz
2	1280 . 1024 at 76 Hz
1	1600 . 1280 at 76 Hz
0	1024 . 768 at 77 Hz

Programming the Screen Resolution

Nvramrc is a nonvolatile PROM script memory. When the PROM reaches the device probing stage, it checks the variable use-nvramrc?, if it is true, executes the Forth code that resides in nvramrc, otherwise it calls probe-sbus, install-console and banner.

The following code places resolution initialization between the probe-sbus stage and the install-console and banner stages.

First probe-sbus is called to probe all devices, so that the device tree is created, and the devices are initialized.

The next line defines a Forth word called vsetup which contains the monitor video setup values. The following string of values (defined in Table 1-3) are the specifications for a video setup:

" 117000000,71691,67,16,112,224,1280,2,8,33,1024,COLOR,0OFFSET"

Table 1-3

Value	Description
117000000	Pixel frequency or dot clock in Hz
71691	Horizontal frequency in Hz
67	Vertical frequency in Hz
16	Horizontal Front Porch (in pixels)
112	Horizontal Sync Width (in pixels)
224	Horizontal Back Porch (in Pixels)
1280	Horizontal Displayed pixels (in pixels)
2	Vertical Front Porch (in lines)
8	Vertical Sync Width (in lines)
33	Vertical Back Porch (in lines)
1024	Vertical Displayed lines (in lines)
COLOR	Color monitor flag
0OFFSET	No sync pedestal flag

The line, vsetup 4, basically pushes the video string on the stack, the number 4 defines the sense code of the monitor we want to change the resolution on. See Table 1-4 on page 6 for supported monitor codes.

The next line, pushes the string /sbus/cgsix@1 onto the Forth stack, the path for the device where the resolution is to be changed.

The following example changes the cgsix frame buffer on SBus slot 1.

The string "override" is the actual entry point in the cgsix fcode PROM which reconfigures the resolution from the data present on the forth stack. execute-device-method actually calls override and returns a pass/fail flag which is ignored by the drop command that follows.

The remaining two lines install-console and banner, installs a terminal driver on the display device, then prints the banner at reset time or reboot time.

Configuring Monitors Using a UNIX Script

The following is an example of a UNIX script used to configure the TurboGXplus for a resolution of 1280 . 1024 at 67 Hz:

Configuring Monitors Using the PROM Method

The following example uses the PROM method to configure the TurboGXplus for a resolution of 1280 . 1024 at 67 Hz:

Table 1-4 contains codes for TurboGXplus supported resolutions:

Table 1-4

Resolution	Code
1024 . 768 at 60 Hz	" 64125000,48286,60,16,128,160,1024,2,6,29,768,COLOR"
1024 . 768 at 70 Hz	" 74250000,56593,70,16,136,136,1024,2,6,32,768,COLOR"
1024 . 768 at 77 Hz	" 84375000,62040,77,32,128,176,1024,2,4,31,768,COLOR"
1152 . 900 at 66 Hz	" 94500000,61845,66,40,128,208,1152,2,4,31,900,COLOR"
1152 . 900 at 76 Hz	" 108000000,71808,76,32,128,192,1152,2,4,31,900,COLOR,0OFFSET"
1280 . 1024 at 67 Hz	" 117000000,71691,67,16,112,224,1280,2,8,33,1024,COLOR,0OFFSET"
1280 . 1024 at 76 Hz	" 135000000,81128,76,32,64,288,1280,2,8,32,1024,COLOR,0OFFSET"
1600 . 1280 at 76 Hz	" 216000000,101890,76,24,216,280,1600,2,8,50,1280,COLOR,0OFFSET"

Setting up a Single Monitor Using the PROM Method

The following is an example of how to set up a TurboGXplus card in slot 2 to 1024 . 768 at 60 Hz using a 16-inch monitor:

Setting up a Single Monitor Using a UNIX Script

The following example is a UNIX script that sets a 1024 . 768 at 60 Hz for the TurboGXplus card in slot 2.

Setting up Multiple Monitors using a UNIX Script

The following screen shows a UNIX script, which sets up the TurboGXplus cards in slot 1 to 1152 . 900 at 76 Hz, and another TurboGXplus card in slot 3 to 1280 . 1024 at 67 Hz using two 19-inch monitors:

For more information on running multiple monitors, see Chapter 8, "Multiple Monitors on a System."