16 April 2018, 18:30 | #1 |
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Ode to Ramon 1 by The Digital Force - Unreadable scroller
Link to Pouet page.
Please note the last comment. I have tested this demo on AmiKit 8 and AiaB setups with latest WHDLoad but both have this bug still present. Demo (in WHDLoad form) can be downloaded here- ftp://ftp:amiga@grandis.nu/Commodore...gitalForce.lha Can anyone replicate this or is there just a problem with my configs? Thanks! |
16 April 2018, 19:07 | #2 | |
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16 April 2018, 19:10 | #3 |
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I tried the disk image at Pouet and the WHDLoad version by StingRay:
Disk image works fine on A500, but NOT on A600/A1200 (scroller corrupted) WHDLoad version works fine on my A1200 config. There's nothing buggy about the disk image nor StingRay's patch. |
16 April 2018, 19:39 | #4 |
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Scroller (in original disk) only works with OCS Agnus.
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17 April 2018, 02:26 | #5 |
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Thanks for the replies but pay attention lads. :P xD
The notes from Stingray explains the bug and that it's been fixed for all graphic chips but I'm using WHDLoad and not OCS and am still getting the problem. Is that a custom install Foebane or one of those ready made ones you can download? I was going to test one of those for myself but I can save myself the bother if that is what you're using. |
17 April 2018, 09:15 | #6 |
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I use Bloodwych's ClassicWB Lite, and the config is based on the Quickstart options for a plain A1200, and I just added hard drives and gave myself plenty of Fast RAM.
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17 April 2018, 10:53 | #7 | |
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Quote:
Edit: But I'll check the patch code and update it if necessary, it's always possible there's a bug somewhere of course. Code:
; rather unconventional way to fix the modulo bug on ECS machines ; but it works move.l #$35000+$5000,$50(a5) move.l #$75000,$54(a5) move.w #50,$66(a5) ; skip every other line move.w #$09f0,$40(a5) move.w #23<<6+25,$58(a5) .w2 btst #6,$2(a5) bne.b .w2 rts Last edited by StingRay; 17 April 2018 at 11:27. Reason: Additions |
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17 April 2018, 12:07 | #8 |
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Hi Sting, what's this blitter modulo bug?
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17 April 2018, 12:12 | #9 |
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It is weird bitplane side-effect in OCS, not directly modulo specific.
Very old post here: http://eab.abime.net/showpost.php?p=456323&postcount=7 |
17 April 2018, 12:13 | #10 |
move.l #$c0ff33,throat
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Hi Ross, it's caused by a very low DDFSTRT value, on OCS machines the scroller has a scanline effect, on ECS/AGA machines it's completely trashed as the modulo is wrong and the scanline effect isn't there either. Which is why I simply recoded the scroller for the WHDLoad patch.
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17 April 2018, 12:15 | #11 |
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ah, ok
Thanks to both. |
17 April 2018, 14:21 | #12 |
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I have now checked the patch and there's no problem with the scroller on my 4060 (on which I originally coded the patch) and neither on Frequent's Amiga. I will update the patch anyway as I have detected an uninitialised buffer in the copperlist but this has nothing to do with the scroller.
Are you running the patch on a real machine or in the emulator? |
17 April 2018, 15:11 | #13 | |
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Oh gosh, the very man himself!
Quote:
P.S. Interesting that another bug has been found, all these years later! |
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17 April 2018, 15:29 | #14 | |
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Can't be a WinUAE issue if Foebane is running this fine via ClassicWB. |
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17 April 2018, 16:08 | #15 |
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That's what's confusing me. I'm going to try it myself with the Lite (and possibly others) ClassicWB setup when I get home.
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17 April 2018, 16:35 | #16 | |||
move.l #$c0ff33,throat
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17 April 2018, 16:55 | #17 |
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If it helps, the Kickstarts I use for WHDLoad originally came from Cloanto's Amiga Forever 2012 Edition (if I remember rightly) - it may have a bearing on whether the demo works or not, since I recently heard that Cloanto keeps altering the Kickstart ROMs every year.
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17 April 2018, 17:21 | #18 |
move.l #$c0ff33,throat
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I have now checked using WinUAE 3.6, if cycle-exact is not enabled the scroller will look buggy, once cycle-exact mode is enabled the scroller looks fine.
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19 April 2018, 01:44 | #19 |
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"nope."
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19 April 2018, 02:16 | #20 |
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In reply to #2- yes, I notice you have! Thank you, but still no luck I'm afraid. I'm about ready to quit to be honest...
On a side note, this beta of WinUAE crashes on me quite a bit so perhaps it has something to do with that? Who knows at this point?!?! |
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