This is also in relation to the "Flashing a PC Radeon 9800 Pro" thread on this forum.
A long post, but please bear with me as I want to give as much detail as possible to make it clear and avoid as many clarification-questions as possible.
SO, after a lot of research (i stress, A LOT), a semi-sucessful (got some artifacts on the display in my G4 using it) flash of a GeForce 2 about two years ago, I wanted to flash a Radeon 9800 pro to use in my PM G4 DA (I have the crappy rage 128 in it currently) (that I by the way got from a raffle from
Apple
when I used to work there (in Ireland) and I dragged it along me on the plane as the only checked in luggage I had back to Sweden
). It is the Jewel of my collection! 
The card I have is a red 128 ATI Radeon 9800 Pro (looking like the one on the other thread) that I bought from eBay with the purpouse of flashing it. It was cheap, but worked perfectly fine in my Dell. It seems to me as if the ROM chip is the 64 version, as the report from ATIflasher corresponds to what have been stated about the different ROM versions on this forum and in other places, but I am only 90% shure of this.
Well, It seemed to me as if the "good 'ol Dell Dimension 8200" was the best bet to do it on, at least at first. Little success did I have. It seemed that the card did not want to be flashed somehow. Nothing happened (I followed the instructions from this site, using "Waybackmachine, as the site seems to have dissapeared; http://web.archive.org/web/20080606030655/http://www.dragoth.net/~dragoth/projects/9800-in-a-mac/
In conjunction with the advices/instructions given on what DOS commands to write from the well-known Mac-Elite site.
I did everything exactly as suggested in DOS, nothing happened in terms of flashing (no OK message or anything else). WI didn't even manage to back up (on to the floppy) the old rom.
Well, let's try it on the G4 instead, I thought.
I set up VNC and remotly controlled my G4 from my MacMini.
Using Graphicellerator and the full and reduced rom for my card (more precicley these two; 1)Retail Radeon 9800 Pro 130 AGP 2x/4x/8x 378/337.5 MHz 128MB BGA DDR 128KB
and 2) gotoh (reduced using new method) 9800 PRO 128MB 130 AGP 2x/4x/8x 378/337.5MHz 128MB BGA DDR 64KB ) I flashed it.
Well...
Graphicellerator gave me, after the flashing process went up to 100%, an error message that I unfortunatley don't remember now, but I am pretty sure that it was the "ERROR Programming Devices" message.
OK, I thought, I'll just reboot and try it again using the other ROM. Well, after rebooting, my system did not recognize any card at all anymore. Hmm. I will try and flash it back in the PC instead. Sorry pal, no can do! No display when back in the PC (starting up in DOS)
So here I am, stuck in limbo and frustration, hoping for the help of my fellow Mac-user friends!



OH, and yes, I did disable (using tape) pins 3 and 11, and I did enable them back when putting it back in the PC.
A long post, but please bear with me as I want to give as much detail as possible to make it clear and avoid as many clarification-questions as possible.
SO, after a lot of research (i stress, A LOT), a semi-sucessful (got some artifacts on the display in my G4 using it) flash of a GeForce 2 about two years ago, I wanted to flash a Radeon 9800 pro to use in my PM G4 DA (I have the crappy rage 128 in it currently) (that I by the way got from a raffle from


The card I have is a red 128 ATI Radeon 9800 Pro (looking like the one on the other thread) that I bought from eBay with the purpouse of flashing it. It was cheap, but worked perfectly fine in my Dell. It seems to me as if the ROM chip is the 64 version, as the report from ATIflasher corresponds to what have been stated about the different ROM versions on this forum and in other places, but I am only 90% shure of this.
Well, It seemed to me as if the "good 'ol Dell Dimension 8200" was the best bet to do it on, at least at first. Little success did I have. It seemed that the card did not want to be flashed somehow. Nothing happened (I followed the instructions from this site, using "Waybackmachine, as the site seems to have dissapeared; http://web.archive.org/web/20080606030655/http://www.dragoth.net/~dragoth/projects/9800-in-a-mac/
In conjunction with the advices/instructions given on what DOS commands to write from the well-known Mac-Elite site.
I did everything exactly as suggested in DOS, nothing happened in terms of flashing (no OK message or anything else). WI didn't even manage to back up (on to the floppy) the old rom.
Well, let's try it on the G4 instead, I thought.
I set up VNC and remotly controlled my G4 from my MacMini.
Using Graphicellerator and the full and reduced rom for my card (more precicley these two; 1)Retail Radeon 9800 Pro 130 AGP 2x/4x/8x 378/337.5 MHz 128MB BGA DDR 128KB
and 2) gotoh (reduced using new method) 9800 PRO 128MB 130 AGP 2x/4x/8x 378/337.5MHz 128MB BGA DDR 64KB ) I flashed it.
Well...
Graphicellerator gave me, after the flashing process went up to 100%, an error message that I unfortunatley don't remember now, but I am pretty sure that it was the "ERROR Programming Devices" message.
OK, I thought, I'll just reboot and try it again using the other ROM. Well, after rebooting, my system did not recognize any card at all anymore. Hmm. I will try and flash it back in the PC instead. Sorry pal, no can do! No display when back in the PC (starting up in DOS)
So here I am, stuck in limbo and frustration, hoping for the help of my fellow Mac-user friends!
OH, and yes, I did disable (using tape) pins 3 and 11, and I did enable them back when putting it back in the PC.