MP 1,1-5,1 I want to boot FreeDOS on Mac Pro 2009

[ZNDK]

I am trying to get FreeDOS to run on my Mac Pro 2009(5.1). I was able to boot FreeDOS before I changed my firmware to 5.1. I have not been able to boot FreeDOS(1.0, 1.1, 1.2) since I changed my firmware to 5.1.
I'm replacing the CPU with X5670.

It shows about 4 lines of text starting with ISOLINUX and I wait for hours after that and it does not progress.
I have tried PRAM clear and SMC reset. Is there any other way to boot FreeDOS?

 

[Macschrauber]

just dd the iso to an empty spinner

 

[ZNDK]

I was able to solve the problem myself. After flashing the video card ROM on a different Mac, I was able to boot FreeDOS on the original Mac.

 

[krakman]

After flashing the video card ROM on a different Mac,

Please explain further

 

[ZNDK]

Please explain further

I don't know why either. I could not get FreeDOS to boot even after replacing the video card within the same Mac Pro 2009. I borrowed another Mac Pro (2008) and flashed the RX580 ROM on it. Then I was able to boot FreeDOS on any video card. *I have an RX580 as my main video card.

 

[Nguyen Duc Hieu]

I don't know why either. I could not get FreeDOS to boot even after replacing the video card within the same Mac Pro 2009. I borrowed another Mac Pro (2008) and flashed the RX580 ROM on it. Then I was able to boot FreeDOS on any video card. *I have an RX580 as my main video card.

FreeDOS on RX580?
I would just sell the RX580 (maybe at higher price than when I purchased it new) and plug in the good old 7300GT for freeDOS.

 

[jantoman]

Yesterday I fixed a Seagate 7200.10 HD affected by the BSY bug, and I decided to update the firmware. I downloaded from Seagate the ISO image and burned a CD. It booted on my Mac Pro 5,1 but the hard disk wasn't recognized... Then I tried with an old Mac Pro 1,1; the boot was successful and the firmware update went on smoothly. Guess that the SATA controller are different on those machines, correct?