sup8pdct Posted March 30, 2009 Share Posted March 30, 2009 After a bit of work, have finally got a rev B Pal rom complete with the floating point routines. The rom file that generally comes the emulators is ntsc and has a few changes in it which i believe was to do with the translator disk for the XL. Eg; don't write to $D301, don't check for special carts. I am blessed with both atari original Rev A and Rev B source listings so was easy to find and fix the changes. Also having 2 different local hacked versions of rev B was the most help James ATARIOSBpal.zip Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 30, 2009 Share Posted March 30, 2009 But... was there ever a Rev A PAL ROM to begin with? Quote Link to comment Share on other sites More sharing options...
carmel_andrews Posted March 30, 2009 Share Posted March 30, 2009 Already got one...i leeched it from the pigwa.net ftp site....they have all the A8 bioses there (can't remember the full web address though) Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 30, 2009 Author Share Posted March 30, 2009 Yes. checkout http://www.atariage.com/forums/index.php?s...00#entry1712834 That is rev A PAL, just like the 400 and 2 800's I have here, right down to the same chip part numbers. Rev B didn't come out till early 82. Am sure atari had Computers here before then. James But... was there ever a Rev A PAL ROM to begin with? Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 30, 2009 Author Share Posted March 30, 2009 Would be interested to see it. It may or maynot be completly orignal. James Already got one...i leeched it from the pigwa.net ftp site....they have all the A8 bioses there (can't remember the full web address though) Quote Link to comment Share on other sites More sharing options...
carmel_andrews Posted March 30, 2009 Share Posted March 30, 2009 (edited) Here you go Atari_OS_vB_PAL.zip Edited March 30, 2009 by carmel_andrews Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 30, 2009 Author Share Posted March 30, 2009 Where? James Here you go Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 30, 2009 Share Posted March 30, 2009 I thought it was earlier than that... in fact I had the impression it was not long after GTIA. I have the first Atari computer I ever saw in my posession now (400 given from friend)... I think they bought it in 1981 but could have been '82. OS has been replaced with SuperMon though. Quote Link to comment Share on other sites More sharing options...
carmel_andrews Posted March 30, 2009 Share Posted March 30, 2009 I don't think this site likes uploading .rom or .rar files.....only .zip files (bloody annoying) Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 30, 2009 Author Share Posted March 30, 2009 I was slightly annoyed after getting my 3rd 800, all had rev A and GTIA. I was under the impression that we never got CTIA. Yet to see one with that chip. James I thought it was earlier than that... in fact I had the impression it was not long after GTIA. I have the first Atari computer I ever saw in my posession now (400 given from friend)... I think they bought it in 1981 but could have been '82. OS has been replaced with SuperMon though. Quote Link to comment Share on other sites More sharing options...
mimo Posted March 30, 2009 Share Posted March 30, 2009 I believe that all PAL 400/800s had GTIA. CTIA was upgraded very early on in the computers production life (1981 iirc) Quote Link to comment Share on other sites More sharing options...
carmel_andrews Posted March 30, 2009 Share Posted March 30, 2009 (edited) Anyone have a proper working version of the xl/xe rom...one's I have always show up as a bad rom when i use it thru an emulator (i.e shows up as red) in the self test memory test thing i've tried the following ones atarixl.rom (as originally came with pcxformer) atarixlxe.rom xe.rom xe(pal).rom xl.rom Atari OS v2 83.10.05.rom and atarixegs.rom all show up as bad on the memory test thing Edited March 30, 2009 by carmel_andrews Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 30, 2009 Author Share Posted March 30, 2009 That one is actually a modifyed rev B ntsc. $E6E7 has 3 NOP's which shouldn't be there. The timings in the sio routines are set to NTSC. Special cart routines have been bypassed. Key repeat timings etc. All the mods point to a translator disk version. Sorry to say, but that file isn't named correctly. I have been finding that a lot with the rev B. very hard to get a true and correct version. James Here you go Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 30, 2009 Author Share Posted March 30, 2009 Maybe you need to remove the first 6 bytes that is a dos overhead for them to work. James Anyone have a proper working version of the xl/xe rom...one's I have always show up as a bad rom when i use it thru an emulator (i.e shows up as red) in the self test memory test thing i've tried the following ones atarixl.rom (as originally came with pcxformer) atarixlxe.rom xe.rom xe(pal).rom xl.rom Atari OS v2 83.10.05.rom and atarixegs.rom all show up as bad on the memory test thing Quote Link to comment Share on other sites More sharing options...
ijor Posted March 30, 2009 Share Posted March 30, 2009 I have been finding that a lot with the rev B. very hard to get a true and correct version. Hi James, Isn't it trivial to "produce" or to confirm/verify rev. B PAL OS? We have the official source listing. The difference with the NTSC version is noted in the listing with conditional assembly, and should be something like a dozen bytes. Or I am missing something ? Quote Link to comment Share on other sites More sharing options...
Kr0tki Posted March 30, 2009 Share Posted March 30, 2009 Anyone have a proper working version of the xl/xe rom...one's I have always show up as a bad rom when i use it thru an emulator (i.e shows up as red) in the self test memory test thing Your ROMs are fine, but you have the SIO patch (or other patches) turned on. Quote Link to comment Share on other sites More sharing options...
a8isa1 Posted March 31, 2009 Share Posted March 31, 2009 Freddy Offenga had collected authentic images a while back. You'll find them here. - Steve Sheppard Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 31, 2009 Share Posted March 31, 2009 A program that uses some sort of CRC algorithm would be good. Atari-based preferable. Maybe even do it on a per 1K block basis so any differences could give an indication of what the mod might be. Properly patched/modded ROMs would have their checksums corrected, and a modded ROM might vary from something that just defeats Attract Mode to something that includes a mini-Monitor or similar. Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 31, 2009 Author Share Posted March 31, 2009 How many people out there would like to type in or verify every byte in the OS as being true and correct? I also have the source listing and have found at least 1 byte that is in error compared to the source. The routine is the same in rev A and compairing pal V ntsc shows the difference. Also, there is a project that Warerat is doing that I have put up my hand for one. I personally would like a true and correct rev B PAL version of the os to go with it. James I have been finding that a lot with the rev B. very hard to get a true and correct version. Hi James, Isn't it trivial to "produce" or to confirm/verify rev. B PAL OS? We have the official source listing. The difference with the NTSC version is noted in the listing with conditional assembly, and should be something like a dozen bytes. Or I am missing something ? Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 31, 2009 Author Share Posted March 31, 2009 He doesn't have a Pal os B. James Freddy Offenga had collected authentic images a while back. You'll find them here. - Steve Sheppard Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 31, 2009 Share Posted March 31, 2009 (edited) Stuff typing anything in... there's plenty of unmodded machines out there and people who can supply ROM images. And since there should be no more than 4 "official" 400/800 ROMS (OS A/B, NTSC/PAL) it shouldn't be too hard to work it all out. Pretty sure too that PAL/NTSC should have different hard-coded key repeat rates, as well as the baud-rate tables. Edited March 31, 2009 by Rybags Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted March 31, 2009 Author Share Posted March 31, 2009 Not baud rate tables but baud adjustment values and time out values due to the different vblank rates. James Pretty sure too that PAL/NTSC should have different hard-coded key repeat rates, as well as the baud-rate tables. Quote Link to comment Share on other sites More sharing options...
ijor Posted April 1, 2009 Share Posted April 1, 2009 How many people out there would like to type in or verify every byte in the OS as being true and correct? I didn't mean "people" should do that. I've been reading here that PAL rev B was very rare, considered as possibly lost or even never released. So what I meant is that it should be (almost) trivial to re-create it from the listing, even if it was never found. Of course that confirming with an actual ROM chip is very good. I also have the source listing and have found at least 1 byte that is in error compared to the source. What error did you find? I just compared the PAL rev B you posted with the "known" NTSC rev B. I found 11 bytes to be different. Didn't double check, but these bytes seem to be exactly the ones marked in the source. Quote Link to comment Share on other sites More sharing options...
sup8pdct Posted April 1, 2009 Author Share Posted April 1, 2009 (edited) at ebb9 and ebc0. Hold on, I see what is happening. I missed a conditional .IF way back in the variable define area. It means I have missed 2 bytes that should have been changed. All fixed James How many people out there would like to type in or verify every byte in the OS as being true and correct? I didn't mean "people" should do that. I've been reading here that PAL rev B was very rare, considered as possibly lost or even never released. So what I meant is that it should be (almost) trivial to re-create it from the listing, even if it was never found. Of course that confirming with an actual ROM chip is very good. I also have the source listing and have found at least 1 byte that is in error compared to the source. What error did you find? I just compared the PAL rev B you posted with the "known" NTSC rev B. I found 11 bytes to be different. Didn't double check, but these bytes seem to be exactly the ones marked in the source. ATARIOSBpal.zip Edited April 1, 2009 by sup8pdct Quote Link to comment Share on other sites More sharing options...
+DjayBee Posted April 1, 2009 Share Posted April 1, 2009 (edited) If I get it right, you guys are searching for a dump of the standard PAL B ROM? If someone posts a tool which dumps the OS from the running system then I will try to fire up my old 400 which I did not use for 10+ years hope that it still runs and see what I get from it. Edited April 1, 2009 by DjayBee Quote Link to comment Share on other sites More sharing options...
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