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fade
Account closed
Registered: Mar 2002
Posts: 290 |
vice not reading stable .d64 dir's
okay here it is, i have a few images that i know work 100% .. but now loaded on vice 2.0 they show the above dir listing, i've dropped back to 1.22 and i still get this on a couple, some now show the correct directory listing.. anyone have any ideas as to why and what causes this?
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Devia
Registered: Oct 2004
Posts: 401 |
WVL: please define "real" by means of DL source or MD5 hash. I've seen numerous AR6 "originals" with different content. |
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AlexC
Registered: Jan 2008
Posts: 298 |
Quote: WVL: please define "real" by means of DL source or MD5 hash. I've seen numerous AR6 "originals" with different content.
Very true. Also I'd take a look at the drive itself. There are different roms not to mention problems with fastloaders on C128D even in 1541 emulation mode. |
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WVL
Registered: Mar 2002
Posts: 896 |
Quote: WVL: please define "real" by means of DL source or MD5 hash. I've seen numerous AR6 "originals" with different content.
Hell, I dont know :D |
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Oswald
Registered: Apr 2002
Posts: 5086 |
hmm well I'm not so sure anymore about this bug, it may be I have only seen it on emu, one thing is sure I know it since ages. I had a c128dcr 64k vdc, and an original cart with a rom like actionr75h.crt. |
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chatGPZ
Registered: Dec 2001
Posts: 11351 |
the "bug" you are talking about happens on the real thing aswell, but not the way it does on the emu :)
what actually happens is, that depending on the mapping which is currently active, the phi2 related memory map is "wrong", and the vic sees garbage. on the real thing you can sometimes notice that as single rasterlines that show wrong charset (or whatever).
(and i just accidently stumbled about a simple hack that totally removes the problem from vice, if anyone cares... =P) |
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SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
Devia said me there are many AR6 romdumps, all different.
Mine does not have this bug, and neither did my original cart, that i sold to Linus on X.
Devia and me were hacking in AR, i wanted to remove the start screen. After a very confusing swapping of adresses to look at, i realized he doesnt have the same dump as me!
So there is at least 2 versions of AR 6.. |
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chatGPZ
Registered: Dec 2001
Posts: 11351 |
the bug exists in ALL AR versions from 4.2 to 6 (and the hacked 7.x crap too) since - it is a hardware problem :)
wether it is more or less appearent depends on many things, the computer, the cart software (the time between certain banking transitions) etc |
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Devia
Registered: Oct 2004
Posts: 401 |
So are you saying we need to dig up that reverse enginered schematic floating around cyberspace and see if we can spot the cause of the problem ourselves?
- or are you going to elaborate a bit more on it?
And yes, I'd like to know how you worked around it in Vice.
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AlexC
Registered: Jan 2008
Posts: 298 |
Quote: So are you saying we need to dig up that reverse enginered schematic floating around cyberspace and see if we can spot the cause of the problem ourselves?
- or are you going to elaborate a bit more on it?
And yes, I'd like to know how you worked around it in Vice.
Very interesting topic. As for VICE I'd suspect that if this is hardware problem than you just hack memory banking or serial port communication if there lays the problem. |
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