Atari XF-551 ROMs

[Panther]

36 minutes ago, phaeron said:

Problem is, we don't know if it's 7.5 or 7.6 without a picture of the EPROM with the version on it. For all we know, it might just be a non-official modified ROM, which has already happened a couple of times in the linked threads.

It's an official ROM, I have two of them sitting here.  This is the label:

C101696-002

©ATARI 1987

RP2364 2152

38 7L3 10 / 38 7L3 14 (date code probably)

 

[+MrFish]

14 minutes ago, Panther said:

Does anyone know what this ROM is?  It's quite different from the others.

I got it from this thread: XF551 - 3.5 Mod (CharlieChaplin)

It's also in the collection of his next post after that one.

 

[+CharlieChaplin]

1 hour ago, Panther said:

Does anyone know what this ROM is?  It's quite different from the others.

 

looks like a selfmade XF ROM, it can be found here:

http://blog.3b2.sk/igi/post/OS-Atari-XF551-Turbo-XF551.aspx

 

XF 4x OS Eprom:

http://blog.3b2.sk/igi/post/4x-OS-(firmware)-Atari-XF551.aspx

 

Other articles by this author about XF551:

http://blog.3b2.sk/igi/search.aspx?q=XF551

 

Happy translating!

[phaeron]

33 minutes ago, Panther said:

It's an official ROM, I have two of them sitting here.  This is the label:

C101696-002

©ATARI 1987

RP2364 2152

38 7L3 10 / 38 7L3 14 (date code probably)

 

Now that's valuable info. Cracked open my XF551, and it's a C101696-003 7.7:

 

 

So, if we're lucky, the part revisions would line up to make the original C101696 7.4, -001 would be 7.5, -002 would be 7.6, and -003 would be 7.7 -- though I can't find verification of the 7.4 label.

 

Also, solves the mystery of what that "ABCD" is on that filename, though that checksum doesn't match 7.7 or that modified ROM.

 

[BillC]

4 hours ago, Panther said:

Does anyone know what this ROM is?  It's quite different from the others.

I couldn't find a website that would translate the following webpage automatically, the language is slovak.

 

http://www.atarionline.pl/utils/9. ROM-y/BIOS-y - stacje dysków/Atari XF551 Turbo.aspx

 

 

Here is the text after being copied/pasted into an online translator:

Quote

Today I will be brief, but I managed to find on the web (finally !) another OS for the Atari XF551 floppy disk drive than the original OS and the famous OS (Hyper-XF) by S.Dorndorf. So we finally have 3 usable eprom content available for this unit. As always with atari XF551, only the bottom 4kB Eprom is used from the 8kB Eprom space, the other 4kB Eprom is unused. Thus, if you want to try it out, just burn Eprom 2764 with this attached file. Just a comparison of the content says that those changes from the original OS are really worth it there. The code is written significantly more efficiently because its resulting length is in 
result by knowledge shorter.

I've been testing this OS for 2 days, everything seems to be running the way it should, the sector copyer is saving what it's got, obviously it's going to take longer to rehearse, but right now all O.K., that's longer testing - in that I hope someone will help me.

Note:

Unfortunately one old pain remained - it does not know the correct density of the floppy disk after it was replaced ...

Next time, the involvement of all 3 operational sythemas in one Eprom type 27128 will follow (one 4kB block in it will remain unused). One zero-middle position switch is enough to switch. There are still a few individuals that such switching options 3x OS for Atari XF551 are of interest to ...

Edited July 23, 2022 by BillC

[Panther]

5 hours ago, BillC said:

I couldn't find a website that would translate the following webpage automatically, the language is slovak.

http://www.atarionline.pl/utils/9. ROM-y/BIOS-y - stacje dysków/Atari XF551 Turbo.aspx

Here is the translation of the text from the page with the ROM posted:

Quote

Available sources differ on who is actually the author of this OS. Once it is claimed that the author is the company KMK (most likely, I am also leaning towards KMK), then again that the company TOMS. It is known with certainty that this OS comes from Poland. Laughing
So the aforementioned OS follows:
XF551_Turbo.EPR (8.00 kb)

 

[JohnBlbec]

Hi. I was asked by Igi to share that url for @manterola so here it is - http://blog.3b2.sk/igi/post/Atari-XF551-OS-firmware-in-PROM-8050.aspx

[+Larry]

Moved to Altirra thread.

[manterola]

This is fantastic!  I have been trying to get that firmware forever. I would like to know more about the software and hardware used to get the firmware from the 8050.

 

I will check differences with other  known xf551 firmware versions.

Thanks for the heads-up!

Edited June 10, 2023 by manterola

[manterola]

On 7/23/2022 at 4:39 PM, phaeron said:

Now that's valuable info. Cracked open my XF551, and it's a C101696-003 7.7:

 

 

So, if we're lucky, the part revisions would line up to make the original C101696 7.4, -001 would be 7.5, -002 would be 7.6, and -003 would be 7.7 -- though I can't find verification of the 7.4 label.

 

Also, solves the mystery of what that "ABCD" is on that filename, though that checksum doesn't match 7.7 or that modified ROM.

 

I just checked the ROM that Igi (http://blog.3b2.sk/igi/post/Atari-XF551-OS-firmware-in-PROM-8050.aspx) extracted from the Atari branded Intel 8050 processor (CO70235) and it is the same Checksum than C101696-002:  D438B4D9.  It is 4KB of data and 4KB of 0x00. 

In conclusion, Atari sent this specific ROM for the fabrication of their P8050H processors for XF551 disk drives. So basically, every XF551 has the option to run this firmware if you remove the ROM chip from the motherboard and move the jumper S3 to the S4 position.

[phaeron]

16 hours ago, manterola said:

I just checked the ROM that Igi (http://blog.3b2.sk/igi/post/Atari-XF551-OS-firmware-in-PROM-8050.aspx) extracted from the Atari branded Intel 8050 processor (CO70235) and it is the same Checksum than C101696-002:  D438B4D9.  It is 4KB of data and 4KB of 0x00. 

In conclusion, Atari sent this specific ROM for the fabrication of their P8050H processors for XF551 disk drives. So basically, every XF551 has the option to run this firmware if you remove the ROM chip from the motherboard and move the jumper S3 to the S4 position.

That's strange given that CRC32 D438B4D9 isn't the oldest revision known, we have a rev. 7.4 dump that predates the PAL timing fixes. D438B4D9 is between rev. 7.4 and 7.7 (-003) by code changes. Which means that either they revved the PROM version at least once, or they started shipping with external ROM before burning the PROM versions. I would have expected the PROM version to be either oldest (original) or newest (cost-reduced).

 

[Dropcheck]

On 8/31/2023 at 4:07 AM, manterola said:

I just checked the ROM that Igi (http://blog.3b2.sk/igi/post/Atari-XF551-OS-firmware-in-PROM-8050.aspx) extracted from the Atari branded Intel 8050 processor (CO70235) and it is the same Checksum than C101696-002:  D438B4D9.  It is 4KB of data and 4KB of 0x00. 

In conclusion, Atari sent this specific ROM for the fabrication of their P8050H processors for XF551 disk drives. So basically, every XF551 has the option to run this firmware if you remove the ROM chip from the motherboard and move the jumper S3 to the S4 position.

If you have the specific version of CPU.  Might be implied, but some people like me would make an assumption because they hadn't had their morning coffee(uhmmm Dr Pepper) yet.  😃