On 21/9/05 10:00 am, "Arnel Tuazon" <[EMAIL PROTECTED]> wrote:
> Hey folks,
>
> Does anyone know if the ATI Radeon 7000 64MB PCI card can be flashed to work
> on a Mac? Is there a certain type of Radeons that can't be flashed? I
> remember reading somewhere something about the size of the ROM (?)
> determined if it could be flashed on a Mac.
>
> Secondly, if it can be flashed where do I get the flasher program and the
> whatever else I need in order to do this?
>
>
> Thanks in advance!
Most pc graphics cards have a rom chip which is half the size of the
chip on a mac card - the mac 8 pin flashable rom memory chip is 1 megabit
(128k) and nearly all pc cards have a 64k memory chip - so the full 128k mac
rom will not fit and the flash procedure will stop with an error at halfway
- no room for the other 64k.
The way around this is to replace the 64k rom chip with a 128k chip -
they are manufactured by ST Microelectronics and others - the ST 64k chip is
the m25po5 and the 128k chip is the m25p10 - the latest revision has a 'p'
at the end to denote rhos compliancy (no iffy stuff like lead in it afaik)
but it's the same basic chip.
Desolder the 64k chip and replace it with the new blank 128k chip (some
care and experience of soldering is preferable) - then just install it in a
pci slot - start up the mac with the screen connected to whatever graphics
card you have at the moment - and run the latest ati rom update - the update
will flash the rom into a blank chip - then shutdown and connect the 7000 -
if your soldering is ok it should work fine.
Alternatively if you have a pc you can boot from a dos boot disk and use
flashrom or atiflash to place the mac rom into the chip.
Before you install the card check the speed of the memory chips on it -
the default core and memory speeds in the mac rom are 183/183 whereas the
default speeds in the pc rom are 150/150 and though the core may take the
hike to 183mhz - if the memory is slow it may not - so the reference on the
memory chips should end in -5 or less for 183mhz - if it ends in -7.5 or
higher you will need to downclock the rom memory speed to avoid artifacts.
This can be done with Graphiccelerator.
Sapphire 7000 is the most flashed card.
Pete
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