HF5450 (and other MR-sourced HD5xxx GPUs)

[PGHammer]

This isn't meant to be a rant, so if it sounds like one, I apologize up front.

 

The reason for all the interest by a lot of us (including me!) in getting the HD5450 (and other apparently Mobility HD5xxx) cards working isn't just with notebooks or netbooks.

 

AMD has also pushed through a lot of these into the desktop GPU community (a prime example is my own Visiontek HD5450), and, thanks to the extremely low prices, they are doubtless getting snatched up by a lot of folks looking to tackle a Hack.

 

Here's the known specs (my own card, of course):

 

AMD Naming nomenclature - Cedar Pro

Slot type - PCIe x16

RAM - (512 MB DDR3 (a 1 GB model is also available)

Output ports - DVI-D, HDMI, VGA (primary is DVI-D); a dual-display option is available in Windows and Linux

BIOS ID - 1002:68F9

 

If GraphicsEnabler=Yes and UseATIRom (in current Chameleon) is used, the card will use a *fixed* resolution of 1400x1050 (regardless of how many ports are connected). Resolution-switching does not work (EDID detection does not work, either, including via utility).

It also shows up (with same two switches) as a PCI card (no idea if this is positive or negative, since without proper resolution support (let alone QE/CI), this may be worthless). However, here's what shows up (in System Profiler, of course):

 

Name: ATY,Megalodon

Type: display

Driver Installed: Yes

Bus: PCI

Slot: Slot-1

Vendor ID: 0x1002

Device ID: 0x68f9

Subsystem Vendor ID: 0x1545

Subsystem ID: 0x5450

Revision ID: 0x0000

Link Width: x16

Link Speed: 2.5 GT/s

 

If QE/CI is a nonstarter, display-detection may (in fact, should) be useful.

 

If there is additional information available, I'd certainly be willing to listen (and answer what additional questions I can).

[bbeepp]

Try this: http://www.insanelymac.com/forum/index.php...8&hl=HD5450

 

And add in com.apple.boot.list this framebuffer:

<key>AtiConfig</key>

<string>Hoolock</string>