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Oswald
Registered: Apr 2002
Posts: 5094 |
AR 7.0 freeze bug (?)
Hi there!
At the weekend I was coding on my c128, when this bug costed me about half an hour extra... I thought that my code locks up, but it was the AR's failure IMHO.
it's the following:
inc $d020:jmp *-3
when I place the above code at $9000, start it, and push the freeze button,the machine either locks, or the freezer shows that the code was stopped at $e4xx or some other egzotic mem location.
the same code can be freezed nicely if run at $2000.
What can be the explanation to this ? My AR is buggy ? or this is a feature, not a bug ? |
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Oswald
Registered: Apr 2002
Posts: 5094 |
Clarence: the hardware is too much the same, but might be...
the strangest thing in this, that I use the cart since about 8 years by now with the c128, and I've never experienced anything similar... and I have a strange feeling, that when I will check it today at home, this bug wont show up again.. lets see.. :) |
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Clarence
Registered: Mar 2004
Posts: 121 |
Oswald,
it's the same here with my c64. Weird...
It goes to address e9xx or eaxx when freezing, but on 2000 it's fine.
/Clarence |
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Oswald
Registered: Apr 2002
Posts: 5094 |
wow! now thats strange :) So graham whats up with the buttons ? :)
Maybe its caused by the AR rom, since its somewhere around 8000-a000 if I'm not wrong.. could it be that when freezing the rom gets turned on, but the code at 9000 is not yet "freezed" ? |
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Count Zero
Registered: Jan 2003
Posts: 1932 |
Sounds very interesting ... will dig into the AR code for that and update you on the weekend or so :)
Everybody: write exactly what version you are using! V7 is something non-standard according to my researches. Real development only happened up to version 5. On v6 a little bug was fixed and a the white screen introduced plus some cosmetic changes.
Other versions, such as 7.0, 8.0 or translations have no reliable versioning anymore at all eventhough they are regionally far spread. (e.g. some german "Action Cartridge 7" was sold on teleshop. It IS an action replay, but strangely translated and renamed. Similar happened to some clone-carts in eastern europe regions.)
Also, for testing wether it is a hardware or software problem, one may try using a nordic power cartridge whenever available. The hardware was cloned, aswell as the software, but some little things have changed which may fix such a bug.
Several monitor bugs are the same on both carts.
More info at rr.c64.org in the all_in_one package afair. :)
l8r
Count Zero/CyberpunX/SCS*TRC
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Oswald
Registered: Apr 2002
Posts: 5094 |
its something like mk 7.0 by triumwyrat :)
its dump rom file is:
actionr7h.crt
on the rr site (as fair as I remember) |
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Clarence
Registered: Mar 2004
Posts: 121 |
Hi!
I have a custom design dual rom cartridge, I can switch between atomic power and action replay. My action replay version is: Action Cartridge Plus MK 7.0
L8r,
Clarence |
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Count Zero
Registered: Jan 2003
Posts: 1932 |
And how does it behave ? On both ROMs ?
(I want dumps of both of your ROMs !!! :) Please try with a flashutility of the rr.c64.org site if it detects the ram and asks you to dump the rom)
We tried with 2 RR ROMs and it works just fine. Code can be frozen and restartet over and over again.
On a german v5 though (which is a slightly patched and translated v4.2(+)) the problem is reproducable. The freezer freezes fine all th time though, it just has the a weird start address, usually a few bytes ahead of the real code.
e.g. on $9000 code the freezer is around $900e - $9018 or so.
Didn't find the time yet, but whoever likes to dig through some V5 code for testing purposes may do so :)
A recent post by Graham says:
Try " PRINT $ABCDEF" on any $ enhanced basic extension ... bugs out on RR, AR, FC and others ... $ABCDEE or $ABCDF0 will work just fine usually.
:)
l8r
Count Zero/CyberpunX/SCS*TRC
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Zyron
Registered: Jan 2002
Posts: 2381 |
Try ?""+-0
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Oswald
Registered: Apr 2002
Posts: 5094 |
ok, I will try to dump the rom. |
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Count Zero
Registered: Jan 2003
Posts: 1932 |
Quote: Try ?""+-0
Aehm ? Yes ? ...
... that bugs out on normal c64 aswell and is not supposed to be patched in any way. Extensions on basic are supposed to extend though, not to break or give wrong results in some specific case. hm ?
l8r
Count Zero/CyberpunX/SCS*TRC |
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