comet(7)

comet(7)

NAME

comet - PowerStorm 4D10T, Elsa GLoria, IntraServer Combo device driver

SYNOPSIS


  config_driver   comet
  pseudo-device   ws
  config_driver   pci
  callout after_c "../bin/mkdata pci"

DESCRIPTION

The PowerStorm 4D10T, Elsa GLoria, and IntraServer Combo cards are inexpensive graphics accelerators based on 3DLabs' Permedia2 graphics chip. Supported cards offer up to 8MB of video memory and a large range of video formats.

Hardware Variants

The following three configurations are supported by Tru64 UNIX:

Digital 4D10T 8 MB of video memory. PCI Vend_ID: 0x104c, Dev_ID: 0x3d07, Sub_Vend_ID: 0x1011, Sub_Dev_ID: 0x4d10.
Elsa GLoria 8 MB of video memory. PCI Vend_ID: 0x104c, Dev_ID: 0x3d07, Sub_Vend_ID: 0x1048.
IntraServer Combo Combination card with PCI-PCI bridge chip, P2 graphics device, and one or two ethernet controllers. Graphics component has 4MB of video memory. PCI Vend_ID: 0x3d3d, Dev_ID: 0x0009.

Display Resolution

The following table details the display resolutions that are supported by these cards. Setting the resolution is a task performed by the X Server and the associated documentation should be read for the particulars of the mechanisms used.

Note Before setting a video mode, consult the documentation for the monitor attached to the graphics adapter to verify compatibility with the desired refresh rate and resolution. Monitors can be damaged to the point of doing physical damage to the monitor, other objects, and humans.

Hvis	Vvis	Fv	Fh	Fp	Htot	Hfp	Hsyn	Hbp	Vtot	Vfp	Vsyn	Vbp
640	480	60	29.82	23.86	800	16	64	80	497	1	3	13
640	480	65	32.31	25.84	800	16	64	80	497	1	3	13
640	480	70	34.79	27.83	800	16	64	80	497	1	3	13
640	480	75	37.65	30.72	816	24	64	88	502	1	3	18
640	480	85	42.92	35.71	832	32	64	96	505	1	3	21
800	600	60	37.68	39.79	1056	40	128	88	628	1	4	23
800	600	65	40.82	43.11	1056	40	128	88	628	1	4	23
800	600	70	43.96	46.42	1056	40	128	88	628	1	4	23
800	600	75	46.88	49.50	1056	16	80	160	625	1	3	21
800	600	85	53.64	56.21	1048	32	64	152	631	1	3	27
1024	768	60	48.36	65.00	1344	24	136	160	806	4	6	28
1024	768	65	52.39	70.41	1344	24	136	160	806	4	6	28
1024	768	70	56.42	75.83	1344	24	136	160	806	4	6	28
1024	768	75	60.00	78.72	1312	16	96	176	800	1	3	28
1024	768	85	68.68	94.50	1376	48	96	208	808	1	3	36
1152	870	60	54.36	86.98	1600	64	128	256	906	1	3	32
1152	870	65	58.59	94.22	1600	64	128	256	906	1	3	32
1152	870	70	63.42	101.47	1600	64	128	256	906	1	3	32
1152	870	75	67.95	108.72	1600	64	128	256	906	1	3	32
1152	870	85	77.61	122.31	1576	64	128	232	913	1	3	39
1152	900	60	56.58	85.10	1504	32	128	192	943	2	8	33
1152	900	65	61.30	92.19	1504	32	128	192	943	2	8	33
1152	900	70	66.01	99.28	1504	32	128	192	943	2	8	33
1152	900	75	70.73	106.37	1504	32	128	192	943	2	8	33
1152	900	85	80.16	120.55	1504	32	128	192	943	2	8	33
1280	1024	60	63.96	107.96	1688	48	112	248	1066	1	3	38
1280	1024	65	69.10	117.19	1696	32	112	224	1063	3	3	33
1280	1024	70	74.41	126.20	1696	32	160	224	1063	3	3	33
1280	1024	75	79.95	134.96	1688	16	144	248	1066	1	3	38
1280	1024	85	91.12	157.46	1728	48	160	240	1072	1	3	44
1600	1200	60	75.00	162.00	2160	64	192	304	1250	1	3	46
1600	1200	65	81.25	175.50	2160	64	192	304	1250	1	3	46
1600	1200	70	87.50	189.00	2160	64	192	304	1250	1	3	46
1600	1200	75	93.75	202.50	2160	64	192	304	1250	1	3	46
1600	1280	60	80.28	173.40	2160	64	192	304	1338	1	3	54
1600	1280	65	86.97	187.86	2160	64	192	304	1338	1	3	54
1600	1280	70	93.66	202.21	2160	64	192	304	1338	1	3	54
1600	1280	75	100.35	216.76	2160	64	192	304	1338	1	3	54
1920	1080	60	67.50	159.84	2368	32	144	272	1125	3	3	39
1920	1080	65	73.13	173.16	2368	32	144	272	1125	3	3	39
1920	1080	70	78.75	186.48	2368	32	144	272	1125	3	3	39
1920	1080	75	84.38	199.80	2368	32	144	272	1125	3	3	39
1920	1200	60	75.00	193.80	2584	72	256	336	1250	3	3	44
1920	1200	65	81.25	209.95	2584	72	256	336	1250	3	3	44
1920	1200	70	87.50	226.10	2584	72	256	336	1250	3	3	44
1920	1200	75	93.75	242.25	2584	72	256	336	1250	3	3	44

Table Legend:

Hvis - Visible pixels in a line (e.g. width).
Vvis - Visible lines in a field (e.g. height).
Fv - Vertical refresh rate in Hz.
Fh - Horizontal sync pulse frequency in KHz.
Fp - Pixel clock frequency in MHz.
Htot - Pixel-equivalent duration of the full horizontal scanning period.
Hfp - Pixel-equivalent duration of the horizontal front porch.
Hsyn - Pixel-equivalent duration of the horizontal sync pulse.
Hbp - Pixel-equivalent duration of the horizontal back porch.
Vtot - Line-equivalent duration of the full vertical scanning period.
Vfp - Line-equivalent duration of the vertical front porch.
Vsyn - Line-equivalent duration of the vertical sync pulse.
Vbp - Line-equivalent duration of the vertical back porch.

All frequencies represent target values. Actual values may vary due to hardware precision, temperature, and the need to avoid harmonic resonances. Not all combinations of video format and screen depth are supported on all cards. Cards with only 4MB of video memory won't operate at high resolution and full visual depth.

Device Configuration

With the release of this update for Tru64 Unix 4.0E, the comet driver supports up to 15 devices in a single system. Prior releases of the system software supported seven or fewer devices. Other software, such as the X Server or base operating system, may put additional restrictions on the number of units supported.

Device Description

In PCI-based systems, no more than one VGA device can be configured into the system. The comet cards typically have a jumper or miniature switch to enable and disable VGA operations.

MESSAGES

Device driver messages are typically logged to /var/adm/messages on Tru64 Unix systems. Should problems arise, this file should be checked for informational messages. Some messages of interest:

comet0: %dx%d cursor glyph truncated to hardware limits The X Server attempted to use a cursor larger than the 64x64 limits of the hardware. Cursor glyph will be displayed incorrectly. Application should be brought into conformance with X11 expectations.
comet0: Video pixel fifo underflowed during previous video format The flow of pixel data from video memory to the video DACs was exhausted possibly causing visual artifacts on the display. It is permissible and expected that this may occur once shortly after booting when the device hasn't been configured. But otherwise, this should be reported to Compaq including in the description the video format currently in use as well as the application running at the time.

FILES

/sys/BINARY/comet.mod The driver module which is built into a kernel with the doconfig command.

RELATED INFORMATION

Xdec(1X)