Radeon 7000 Bootup Res & Sun |
February, 28, 2003 11:32 PM |
tippingj |
Greetings to all. Just dragging up my incredably heavy Sony Trinitron GDM-20E20 Sun Monitor. Planning to hook it up to my Mac, via a converter cable I made myself (13w3 to HD15). I know that it does work cause I have tried it- and the other reason is that I am also gonna be switching it between my Sparc Station 2 and my Mac (Mac using the converter). I don't *think* this monitor will sync to the lower 640x480. I think that 800x600 is the bare minimum, but I'm not sure. Sun's website says that the min is some incredably high resolution like 1024x768 as Sun Workstations are high res machines. Ebay auctions claim down to 800x600, and it IS based off a PC Monitor (Sony 20E20 Trinitron), just the cable is different.. Therefor. Is there any way to get OB or OF, whatever it is at bootup, to force itself into a higher resolution, hopefully taking the Console with Mac OS X with it? Meaning, I need something like 800x600, both in the Openfirmware and in the Mac OS X Console at bootup.. Is this possible? I have heard about people having a PROBLEM with this- a Radeon booting into a high Resolution. Except for me its a solution not a problem. |
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RE: Radeon 7000 Bootup Res & Sun |
March, 02, 2003 7:27 PM |
macman |
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I have one of these monitors and it will support 640x480 resolution. I've had issues with monitor adapters not providing complete sync information in the past tho. If it doesn't lock for you, try a different adapter. Stephen |
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RE: Radeon 7000 Bootup Res & Sun |
March, 01, 2003 11:30 PM |
joevt |
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OF will always default to 640x480 on the Radeon 7000 in Old World Macs because NVRAM preferences are not loaded by OF like they are on New World Macs. On Old World Macs, the NVRAM preferences get loaded later by the Mac OS if you boot using Mac OS 9 or earlier (before the screen is cleared to the gray checker board pattern with rounded corners). The NVRAM preferences for Radeon cards are too big (32 bytes for Radeon and 64 for Radeon 7000) for Old World Macs anyway (8 bytes max) so they are not saved at all. OS X does not load NVRAM preferences. I made an extension for OS 9 that forces big NVRAM preferences to be saved to NVRAM so the Mac will boot into OS 9 in whatever resolution was set on a Radeon card at shutdown. For OS X, code needs to be added to read the NVRAM preferences before the splash screen is displayed. For Open Firmware, you can do the following (every time you start up): 1) With XPostFacto, make sure the Radeon card is set as the output- device. 2) Deselect auto-boot? or hold Command-Option OF to boot into Open Firmware. 3) type the following Open Firmware commands: output-device selectdev 27 enable-videomode 27 set-mode 4) you should now be in 1600x1200 75 Hz (mode 27). Type "show-modes" to see the other modes. If you type "boot", then OS X will boot at 1600x1200. Maybe it's possible to hack the 7000 firmware to default to something other than 640x480? |
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