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Ebster
Registered: Nov 2003
Posts: 7 |
can c=64 software damage its hardware?
i know this sounds stupid, but something strange happened yesterday. i tried to delete the scores in world games (triad) with my action replay-mon, saved it to disk as "test". then i used some triad disk utility to change the name and position and saved changes to disk. pushed reset on my action replay and then discovered some "!"-sign left of "f7 install fastload" on that white reset screen. pressed f7 and got to that c64 initial screen, the "!" being still displayed. tried to run my disk and discovered that the directory wouldn´t fully load, breaking with some error. tried to reset several times, also power off for minutes, that "!" still being displayed, even with no periphericals plugged in. loaded some programs and they wouldn´t start or behaved strange. i guess my c64 is broken :( could it have been my fault or is it just a strange coincident??
thanks a lot!
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Oswald
Registered: Apr 2002
Posts: 5086 |
just a coincidence...
you can only damage disk drives by moving heads far to off, but Im not sure wether this really damages a drive... formatting a disk without actually having a disk in the drive will pull the head back.. |
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Graham
Account closed
Registered: Dec 2002
Posts: 990 |
you can misalign the drive head by crashing it into the top or bottom ends of its movement area... but you have to do it thousands of times to potentially misalign it. also, the misalignment can be repaired.
real damage can't be done via software without extra hardware connected. blowing CIAs with a userport cable is possible... |
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Pixman
Account closed
Registered: Dec 2001
Posts: 42 |
I don't if these are just rumours, but I've also read, that you can blow up your VIC chip by doing some special tricks, like the 26th line effect.
Don't know if it just was a joke to scare guys away of it :) |
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White Flame
Registered: Sep 2002
Posts: 136 |
The video circuitry in some of the PETs can be damaged by wonky software settings, but not in the C64. |
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Scout
Registered: Dec 2002
Posts: 1570 |
I heard once (ie. years ago...) it was possible to fry your Amiga/Motorola CPU with a special opcode.
I tried to google on such a thing but nothing came up.
Could be a joke or some fairy tale.
R. |
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ready.
Registered: Feb 2003
Posts: 441 |
In the demo Anime-tion (Anime-tion) on the 26th row displaying part, it tells about the bad effects of this routine on the VIC, as said by Pixman. But later on it claims it to be just a joke...I've tried it only on the emu. |
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yago
Registered: May 2002
Posts: 333 |
You cant damage the VIC with this 26st line stuff, this has been discussed on csc (and c=hacking) some time ago.
If you violate the VIC with nasty tricks (e.g. VSP), the RAM Refresh might stop and the memory will fade away, but resetting the C64 will heal it.
The bottom point is: Never believe any technical explanations inside Demos, most of the Time these are funny (for coders at least) Lies.
As I experienced with some very early C128, i entered the sprite-editor, and the machine got boom. I switched it on and off, but that C128 was dead.
However, this must have been some early, erranous Machine, I was never able to reproduce that.
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cbmhardware
Account closed
Registered: Aug 2003
Posts: 19 |
You can't damage your c64 circuit with any bad software (trick). The only C= computers, which may be damaged are the early PETs with the "smoke poke" (POKE 59458,62).
This speeded up video display.
By the time BASIC 2 was implemented, Commodore cleaned up the video ram circuitry.
Imo is there no way to blow an other C= Computer. |
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Ebster
Registered: Nov 2003
Posts: 7 |
thanks guys! bugjam just gave me a new used c64 and he opened the old one, tested it and concidered some crash on a ram chip. should have had nothing to do with this diek edit stuff.. |
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Ebster
Registered: Nov 2003
Posts: 7 |
btw... how can i blank the world games scores??
;-)))
i am really interested! |
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carlsson
Registered: Nov 2002
Posts: 41 |
Anyway, that PET smoke poke supposedly kills the (integrated?) display, not the mainboard? It depends on how much of a system you call a computer, and in the case of an integrated monitor crashing down, you may as well say the whole computer is unusable. |
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Ebster
Registered: Nov 2003
Posts: 7 |
dont know why it didn´t work the first time, but you just have to fill $0e00 - $0f00 with $00 on worldgames3 file and replace the original file - just for those interested.. |
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ready.
Registered: Feb 2003
Posts: 441 |
Some time ago I found an interesting music editor. It was peculiar since it didn't use the SID and the speakers for making music but the movement of the drive head. I tried it but the sound of the drive head vibrating was so loud that I thought it might get broken and I immediately turned off the drive. Don't know if that sofware could really damage the drive. The software was called "Drive music" |
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algorithm
Registered: May 2002
Posts: 705 |
The only method which might damage the hardware (who knows?) would be turning on/off the c2n tape motor rapidly (by using location 0 or 1?) this would have an effect of giving current and switching off the current to the tape motor and would sometimes give a shivering shaking display) doing this for some time would probably short something? |
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enthusi
Registered: May 2004
Posts: 677 |
whoa...
I assembled a lightbulb to that motor :o)
its in #$01 but needs $0c!=0.
Well I didnt care too much about how often I switch it :) Trying to dim the light with variable on/off-frequencies did not only work pretty nice but also not crashed the machine (yet).
I've done nasty things with some boards and some displayed some crap then but after shutting off everything for like half an hour almost everything went back to normal...
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Steppe
Registered: Jan 2002
Posts: 1510 |
Almost? Hehe... ;-) |
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yago
Registered: May 2002
Posts: 333 |
Quote: The only method which might damage the hardware (who knows?) would be turning on/off the c2n tape motor rapidly (by using location 0 or 1?) this would have an effect of giving current and switching off the current to the tape motor and would sometimes give a shivering shaking display) doing this for some time would probably short something?
I remember the display not to shake, but to "fade a little bit to red".
Did you experience the shaking with C64 or C64C ?
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algorithm
Registered: May 2002
Posts: 705 |
It was the C64C. The shaking would possibly be due to turning on and off the power to the C2N which would give unstable power to the C64 |
