Aquaman Posted August 29, 2012 Share Posted August 29, 2012 Does anybody know why I get an FC Error when using the draw function with the extended basic version of 1541OS for the Aquarius? The original seems to work fine regarding this function. Quote Link to comment Share on other sites More sharing options...
mvdsteenoven Posted August 30, 2012 Share Posted August 30, 2012 I got the same errormessage as well. Well spotted! Just the simple command DRAW "BM30,40" will give the FC error. Are you using the ROM on the Virtual Aquarius or the AquariCart? It would require an update on the AquariCart to have it fixed. Regs, Martin Quote Link to comment Share on other sites More sharing options...
jaybird3rd Posted August 30, 2012 Share Posted August 30, 2012 I'll give it a try this evening, both on Virtual Aquarius and on the Aquaricart. If it fails in both places, I wouldn't be surprised if it was a bug in the original 1541OS ROM that simply went unnoticed before now. Quote Link to comment Share on other sites More sharing options...
jaybird3rd Posted August 30, 2012 Share Posted August 30, 2012 Okay, I couldn't wait. I tried it in Virtual Aquarius, using the original 1541OS ROM dump from the Yahoo! group, and I'm seeing the same error: So far it looks like a bug in the original ROM, or else a bad dump. If that is so, it would probably happen on the Aquaricart also, although I'll have to wait to get home this evening to try it. I'm not going to have time to troubleshoot this myself, but if/when this bug is corrected, I can certainly include it in a patched Aquaricart ROM. (The Aquaricart is not field upgradeable, however, so I'll have to send a new chip to those who want the patch, or exchange the cartridge board.) Quote Link to comment Share on other sites More sharing options...
Aquaman Posted August 30, 2012 Author Share Posted August 30, 2012 I got the same errormessage as well. Well spotted! Just the simple command DRAW "BM30,40" will give the FC error. Are you using the ROM on the Virtual Aquarius or the AquariCart? It would require an update on the AquariCart to have it fixed. Regs, Martin I must admit I stumbled on it using the Virtual Aquarius and haven't tested it on a real one yet. Quote Link to comment Share on other sites More sharing options...
Aquaman Posted August 30, 2012 Author Share Posted August 30, 2012 Okay, I couldn't wait. I tried it in Virtual Aquarius, using the original 1541OS ROM dump from the Yahoo! group, and it fails there, too: It looks like a bug in the original ROM, or else a bad dump. I'm not going to have time to troubleshoot it myself, but if/when this bug is corrected, I'll be glad to package it into an updated Aquaricart ROM for anyone who wants one. (The Aquaricart is not field upgradeable, however, so I'll have to send you a new chip or exchange the cartridge board when the time comes.) This is a very nice gesture, but if the problem is going to be solved just put the "new" ROM in one of your future projects like the mini-expander II perhaps? In my opinion this would make more sense, because for BASIC programming (also without the DRAW function) the OS1541 version is the best offering for the Aquarius mainly due to having joystick control. Quote Link to comment Share on other sites More sharing options...
jaybird3rd Posted August 30, 2012 Share Posted August 30, 2012 This is a very nice gesture, but if the problem is going to be solved just put the "new" ROM in one of your future projects like the mini-expander II perhaps? In my opinion this would make more sense, because for BASIC programming (also without the DRAW function) the OS1541 version is the best offering for the Aquarius mainly due to having joystick control. Let me try it in the Aquaricart this evening, to see for sure if this is an issue with the 1541OS ROM or with the emulator (although I still suspect the former). It would be difficult to integrate a fix to this particular ROM with an unrelated project like the Mini Expander II. I tacked it onto the Aquaricart as a "freebie" because I knew that the hand controller support and other additions to BASIC would be nice to have on the real hardware. If I was to integrate it with another product, I'd want to get rid of the 1541-specific features and add other features that are relevant to the product. I'm not sure I'll have an opportunity to do that, but I'll think over the alternatives. Quote Link to comment Share on other sites More sharing options...
mvdsteenoven Posted August 30, 2012 Share Posted August 30, 2012 I thought I started a disassembly of the 1540 ROM ages ago but was not able to find it (anymore?). I do have an unfinished Extended Basic disassembly as well, I could do a compare between both to see why it is jumping to the FC error. Quote Link to comment Share on other sites More sharing options...
Aquaman Posted August 30, 2012 Author Share Posted August 30, 2012 This is a very nice gesture, but if the problem is going to be solved just put the "new" ROM in one of your future projects like the mini-expander II perhaps? In my opinion this would make more sense, because for BASIC programming (also without the DRAW function) the OS1541 version is the best offering for the Aquarius mainly due to having joystick control. Let me try it in the Aquaricart this evening, to see for sure if this is an issue with the 1541OS ROM or with the emulator (although I still suspect the former). It would be difficult to integrate a fix to this particular ROM with an unrelated project like the Mini Expander II. I tacked it onto the Aquaricart as a "freebie" because I knew that the hand controller support and other additions to BASIC would be nice to have on the real hardware. If I was to integrate it with another product, I'd want to get rid of the 1541-specific features and add other features that are relevant to the product. I'm not sure I'll have an opportunity to do that, but I'll think over the alternatives. In understand. Just see what is possible! Everything you come up with in future projects is appreciated!! Quote Link to comment Share on other sites More sharing options...
Aquaman Posted August 30, 2012 Author Share Posted August 30, 2012 I thought I started a disassembly of the 1540 ROM ages ago but was not able to find it (anymore?). I do have an unfinished Extended Basic disassembly as well, I could do a compare between both to see why it is jumping to the FC error. This would indeed be something worth trying. Maybe DRAW was sacrificied to get the other commands inside, but no mentioning can be found regarding this? Quote Link to comment Share on other sites More sharing options...
jaybird3rd Posted August 31, 2012 Share Posted August 31, 2012 I just checked this with the Aquaricart on RealHardwareTM, and as suspected, it's giving me the same error as in Virtual Aquarius. Quote Link to comment Share on other sites More sharing options...
mvdsteenoven Posted August 31, 2012 Share Posted August 31, 2012 I think I have found the problem. The DRAW command has been overwritten by approx. 50 bytes. The big question is if these 50 bytes belong to another subproces. If so, than I can move it to another (unused) memory area. First I need to check if there are any calls or jumps into these mysterious area. Then I can fix the code by using the DRAW command from Extended Basic 1 Quote Link to comment Share on other sites More sharing options...
jaybird3rd Posted September 1, 2012 Share Posted September 1, 2012 Wow, fast work, Martin! Thanks for looking into this. Quote Link to comment Share on other sites More sharing options...
mvdsteenoven Posted September 2, 2012 Share Posted September 2, 2012 Changing those 50 bytes did not help. Instead of an FC error it now jumped into the MON command. So it did something, only not what I expected. Seems like these bytes is not just code, but some kind of table. First I need to investigate how it is used 1 Quote Link to comment Share on other sites More sharing options...
mvdsteenoven Posted September 3, 2012 Share Posted September 3, 2012 It seems to be working now. I have tried some examples of the Extended Basic manual and I get the same output as the Extended Basic ROM. 1541v2.bin draw "BM35,40" draw "E10;H10;G10;F10;C11" 1 Quote Link to comment Share on other sites More sharing options...
jaybird3rd Posted September 3, 2012 Share Posted September 3, 2012 Excellent news! I'll test this on my own systems as well, when I have time. Assuming everything works, I'll add it to an updated Aquaricart image. Quote Link to comment Share on other sites More sharing options...
mvdsteenoven Posted September 3, 2012 Share Posted September 3, 2012 I didn't do any thorough testing, just some samples from Extended Basic. If anyone out there has more experience with the DRAW command, maybe they can give it a try as well Quote Link to comment Share on other sites More sharing options...
Aquaman Posted September 3, 2012 Author Share Posted September 3, 2012 It seems to be working now. I have tried some examples of the Extended Basic manual and I get the same output as the Extended Basic ROM. 1541v2.bin draw "BM35,40" draw "E10;H10;G10;F10;C11" Just one word WoW!!! Quote Link to comment Share on other sites More sharing options...
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