Author Topic: Faster Flash Access for the 83+/84+  (Read 12561 times)

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Offline thepenguin77

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Re: Faster Flash Access for the 83+/84+
« Reply #45 on: September 10, 2013, 10:44:58 am »
I am now fairly sure that this patch has at least one negative side effect. I have reports from two users of this patch that, with it installed, scrolling to errors from Axe results in garbage being displayed, corruption of RAM, and possibly other issues (now that I'm testing it again in Wabbitemu, the OS will not boot after the issue occurs). After a short amount of testing, it appears that the error can be triggered not just by instant error scrolling from Axe, but also from DoorsCS. The OS version may or may not matter; both users who reported the issue use 2.43.


I was pm'ing a guy for a while about stuff like this, and the best thing I can come up with is that this patch exceeds the maximum read/write speed of flash. He tried several different OS's and he always had the same problem. The only thing I could blame at that point was his hardware.
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Offline Runer112

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Re: Faster Flash Access for the 83+/84+
« Reply #46 on: September 10, 2013, 03:29:56 pm »
I installed 2.43 and the fast flash mod on my 84+SE, and I could perfectly replicate the instant goto symptoms reported by the other two users of 2.43 and the fast flash mod. The issue seems to be specific to the 2.43 version of the patch.

Also, the fast flash mod seems to really conflict with zStart, at least on 84+ calculators. This often means that the OS will crash upon startup if run on RAM clears is enabled. If it isn't enabled, opening the zStart app will often either freeze, crash, or let you in only to reveal that the settings are mostly random garbage. This doesn't seem to be specific to any particular OS.


EDIT: And yes, I've been able to replicate both of these in Wabbitemu.
« Last Edit: September 10, 2013, 03:33:47 pm by Runer112 »

Offline Streetwalrus

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Re: Faster Flash Access for the 83+/84+
« Reply #47 on: September 10, 2013, 03:32:38 pm »
Never had a corruption problem and this bug also happens in an emulator which should be more tolerant than HW. ???

Offline Streetwalrus

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Re: Faster Flash Access for the 83+/84+
« Reply #48 on: September 12, 2013, 04:24:58 pm »
Update : I can confirm that resending an OS (2.43) and reapplying all my patches except this one fixes the issue with Axe.

Offline thepenguin77

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Re: Faster Flash Access for the 83+/84+
« Reply #49 on: September 12, 2013, 04:27:07 pm »
Update : I can confirm that resending an OS (2.43) and reapplying all my patches except this one fixes the issue with Axe.

Glad to hear. I'll have to figure out what's wrong.
zStart v1.3.013 9-20-2013 
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Offline Streetwalrus

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Re: Faster Flash Access for the 83+/84+
« Reply #50 on: September 12, 2013, 04:29:52 pm »
I also allows my calc to exit the Waiting for OS screen. :D Now I'll wait till you fix it before I reapply it.
Edit : I just made myself a nice signed 8xu with the patches I need. Pretty convenient, eh ?
« Last Edit: September 12, 2013, 04:39:41 pm by Streetwalker »