Were "illegal opcodes" used much in games, or was their behavior too unreliable or dependent on exact chip version?

I remember reading that the 6502 had some undocumented opcodes that had some interesting functionality.

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πŸ‘€︎ u/wattnurt
πŸ“…︎ Jan 07 2022
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Enabling SR-IOV on HP DL380P G8 results in red screen of death / illegal opcode in bios?

So I tried enabling sr-iov in my HP DL380P G8's bios, and it results in it not being able to get through the POST with it's red screen of death.

any idea why? I think the only way I know to fix it is to flip the service management dip switch to clear nvram/cmos. (though if someone knows a better way, that would be useful, annoying to pull out machine and switch it back and forth)

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πŸ‘€︎ u/nhlfanatical
πŸ“…︎ Jan 02 2022
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6502 β€œIllegal” Opcodes Demystified masswerk.at/nowgobang/202…
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πŸ‘€︎ u/qznc_bot2
πŸ“…︎ Jun 06 2021
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How to pass nestest without illegal opcodes and graphical output?

Hi.

I've implemented 6502, but i don't want to test illegal opcodes, also i haven't implemented graphics in my emulator, so i cannot simply choose set of instructions to test.

How can i do this?

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πŸ‘€︎ u/PytonRzeczny
πŸ“…︎ Apr 19 2021
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Nestest and its illegal opcodes

I'm running nestest in an emulator in development, and everything matches exactly, right up to the point where the ROM starts to contain illegal opcodes.

That moment is line 5008 in my file (pc = 0xc6bd) β€” https://gist.github.com/jogloran/1ccc466e66619f7ddabea84203764b3c.

At that point, everything seems to go off the rails. I haven't been able to find any info online from devs who have run into issues around the illegal opcodes in nestest. How is an emulator meant to not deal with illegal opcodes and still pass nestest?

I have actually implemented dummy support for the illegal opcodes so that the instruction stream doesn't desync β€” my emulator knows the number of cycles taken by, and number of bytes expected after each illegal opcode, but it treats them all as NOPs.

EDIT: Ok, I've seen that nestest is meant to be run only as far as c66e. (https://forums.nesdev.com/viewtopic.php?t=16449)

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πŸ‘€︎ u/jogloran
πŸ“…︎ May 17 2020
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DL360p G8 Illegal OpCode when trying to use Gen8.1 SPP

Am I using the wrong SPP or something?

P03093_001_spp-Gen8.1-SPPGen81.4

Verified md5 and everything.

I was under the impression this was the correct iso for a g8

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πŸ‘€︎ u/Nightcinder
πŸ“…︎ May 30 2019
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HP ML350 G6 Tower - SSD causing Illegal OpCode Red Screen of Death - Suggestions?

Hello everyone. I have been attempting to build this ML350 G6 for my own data storage, encoding, streaming and light web hosting use. I have a 250 GB Samsung 850 EVO SSD I want to use on the onboard SATA controller for Windows Server 2016, with six typical SATA platter drives on the SAS backplane. Whenever the SSD is plugged into one of the onboard SATA ports, the server halts in the POST while seeking bootable media on the available controllers, presenting a red error screen titled Illegal OpCode with many error codes listed:

Screenshot

Once the SSD is disconnected from the SATA port, the server proceeds normally and can access the BIOS, USB keys, any other firmware, etc.

Specs are as follows: HP ProLiant ML350 G6 Tower Single Xeon E5504 20 GB DDR3 RDIMM Motherboard 511775-001 Revision A Embedded HP Smart Array P410i

Here is what I have tried: -Deleting RAID array volumes and removing HDDs from the cage. -Setting boot order in BIOS to USB keys first then boot controller with onboard SATA before onboard RAID. -Disabling the onboard HP RAID controller in the BIOS completely. -Checking the SDD in other systems and verifying functionality. -Wiping the SDD completely of all volumes from former installs. -Attempting a hot-swap of the SDD once POST passes while it is disconnected (Server 2016 reports no drives, not sure if this controller is hot-swappable but it probably isn't).

All result in either no drive present to the Windows installer or the Illegal OpCode red screen. I am not well-versed in server hardware so I may be doing something stupid here but I cannot figure out why anything would have an issue with a working SSD like this. Any help on this matter would be greatly appreciated. I was planning on getting a LSI HBA controller card to operate this backplane so keeping the onboard HP RAID disabled is not an issue for me. The SATA controller however is needed and it's really confusing to me as to why it would have an issue with a SSD. Thanks for your time.

EDIT: I wanted to take a moment to thank everyone who helped out, especially UKWaffles, but I've still not had good luck with this system functioning with a SSD the way I need. I want to keep this question open in hopes of someone coming across with a good solution. In the meantime, I may try a PCI-E SATA expansion card once I purchase one and see how that does. One way or another I'm going to continue with this G6. Thanks again.

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πŸ‘€︎ u/cambo52s
πŸ“…︎ Mar 16 2018
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Fingerprinting x86 CPUs using Illegal Opcodes x86.lol/generic/2019/02/0…
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πŸ‘€︎ u/mttd
πŸ“…︎ Feb 13 2019
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How MOS 6502 Illegal Opcodes really work pagetable.com/?p=39
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πŸ‘€︎ u/pdq
πŸ“…︎ Jul 31 2008
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SERIOUS: This subreddit needs to understand what a "dad joke" really means.

I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.

Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.

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πŸ‘€︎ u/anywhereiroa
πŸ“…︎ Jan 15 2022
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Blind Girl Here. Give Me Your Best Blind Jokes!

Do your worst!

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πŸ‘€︎ u/Leckzsluthor
πŸ“…︎ Jan 02 2022
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French fries weren’t cooked in France.

They were cooked in Greece.

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πŸ“…︎ Jan 20 2022
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This subreddit is 10 years old now.

I'm surprised it hasn't decade.

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πŸ‘€︎ u/frexyincdude
πŸ“…︎ Jan 14 2022
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You've been hit by
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πŸ‘€︎ u/mordrathe
πŸ“…︎ Jan 20 2022
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I'm sick of you guys posting dumb wordplay in here for awards and upvotes.

Don't you know a good pun is its own reword?

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πŸ‘€︎ u/diggitygiggitycee
πŸ“…︎ Jan 21 2022
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My 4 year oldest favourit joke, which he very proudly memorized and told all his teachers.

Two muffins are in an oven, one muffin looks at the other and says "is it just me, or is it hot in here?"

Then the other muffin says "AHH, TALKING MUFFIN!!!"

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πŸ‘€︎ u/smoffatt34920
πŸ“…︎ Jan 22 2022
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Converting drives to 520 byte sector...

Hi All,

I've been able to successfully convert some drives previously that were 520 byte size to 512 (using sg_format if I remember correctly) and this all worked fine.

Now, I am looking to convert some drives that are 512 to 520. Is this at all possible and if so is it just a case of using the same command but specifying 520 instead?

I've tried it but getting the error of :

Descriptor format, current; Sense key: Illegal Request

Additional sense: Parameter list length error

Descriptor type: Sense key specific: Field pointer:

Error in Command: byte 7 bit 7

Descriptor type: Field replaceable unit code: 0x5

Descriptor type: Vendor specific [0x80]

00 00 00 00 00 00 00 00 00 00 00 00 00 00

MODE SELECT command: Illegal request sense key, apart from Invalid opcode

Can any let me know what might be going on ? Is it a limitation on the drive or just not possible at all?

Thanks.

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πŸ‘€︎ u/TheComputerTech
πŸ“…︎ Dec 21 2021
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Dropped my best ever dad joke & no one was around to hear it

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies πŸ˜‚

πŸ‘︎ 20k
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πŸ‘€︎ u/Vegetable-Acadia
πŸ“…︎ Jan 11 2022
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Just because it's a joke, doesn't mean it's a dad joke

Alot of great jokes get posted here! However just because you have a joke, doesn't mean it's a dad joke.

THIS IS NOT ABOUT NSFW, THIS IS ABOUT LONG JOKES, BLONDE JOKES, SEXUAL JOKES, KNOCK KNOCK JOKES, POLITICAL JOKES, ETC BEING POSTED IN A DAD JOKE SUB

Try telling these sexual jokes that get posted here, to your kid and see how your spouse likes it.. if that goes well, Try telling one of your friends kid about your sex life being like Coca cola, first it was normal, than light and now zero , and see if the parents are OK with you telling their kid the "dad joke"

I'm not even referencing the NSFW, I'm saying Dad jokes are corny, and sometimes painful, not sexual

So check out r/jokes for all types of jokes

r/unclejokes for dirty jokes

r/3amjokes for real weird and alot of OC

r/cleandadjokes If your really sick of seeing not dad jokes in r/dadjokes

Punchline !

Edit: this is not a post about NSFW , This is about jokes, knock knock jokes, blonde jokes, political jokes etc being posted in a dad joke sub

Edit 2: don't touch the thermostat

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πŸ‘€︎ u/CzarcasmRules
πŸ“…︎ Jan 23 2022
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What starts with a W and ends with a T

It really does, I swear!

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πŸ‘€︎ u/PsychedeIic_Sheep
πŸ“…︎ Jan 13 2022
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Why did Karen press Ctrl+Shift+Delete?

Because she wanted to see the task manager.

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πŸ‘€︎ u/Eoussama
πŸ“…︎ Jan 17 2022
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Steve JOBS would have made a better President than Donald Trump

But that’s comparing apples to oranges

πŸ‘︎ 8k
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πŸ‘€︎ u/Ok-Ingenuity4838
πŸ“…︎ Jan 22 2022
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I just flew in from Chernobyl

And boy are my arms legs.

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πŸ‘€︎ u/JhopkinsWA
πŸ“…︎ Jan 23 2022
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So 2 trees got arrested in the town I live...

Heard they've been doing some shady business.

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πŸ‘€︎ u/K1ll47h3K1n9
πŸ“…︎ Jan 18 2022
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I was almost upset that my coffee tasted like dirt today

but then I remembered it was ground this morning.

Edit: Thank you guys for the awards, they're much nicer than the cardboard sleeve I've been using and reassures me that my jokes aren't stale

Edit 2: I have already been made aware that Men In Black 3 has told a version of this joke before. If the joke is not new to you, please enjoy any of the single origin puns in the comments

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πŸ‘€︎ u/scarf_spheal
πŸ“…︎ Jan 19 2022
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No gains
πŸ‘︎ 8k
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πŸ‘€︎ u/ridi86
πŸ“…︎ Jan 22 2022
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How eggs-traordinary
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πŸ‘€︎ u/Rix27_
πŸ“…︎ Jan 21 2022
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What is the scariest tree?

BamBOO!

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πŸ‘€︎ u/K1ll47h3K1n9
πŸ“…︎ Jan 18 2022
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What is a a bisexual person doing when they’re not dating anybody?

They’re on standbi

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πŸ‘€︎ u/Toby-the-Cactus
πŸ“…︎ Jan 12 2022
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A queen size statement.
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πŸ‘€︎ u/Flight-less
πŸ“…︎ Jan 22 2022
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My ten-year-old daughter came up with this at dinner tonight: What do you get if put a copy of Macbeth on top of a dictionary?

A play on words.

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πŸ‘€︎ u/ah1887
πŸ“…︎ Jan 20 2022
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My wife left me because I couldn’t stop doing impressions of pasta

And now I’m cannelloni

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πŸ‘€︎ u/bluestratmatt
πŸ“…︎ Jan 23 2022
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My son, Luke, loves how I named our kids after Star Wars characters...

My daughter, Chewbecca, not so much.

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πŸ‘€︎ u/andersonfmly
πŸ“…︎ Jan 21 2022
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Geddit? No? Only me?
πŸ‘︎ 6k
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πŸ‘€︎ u/shampy311
πŸ“…︎ Dec 28 2021
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I wanna hear your best airplane puns.

Pilot on me!!

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πŸ‘€︎ u/Paulie_Felice
πŸ“…︎ Jan 07 2022
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E or ß?
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πŸ‘€︎ u/Amazekam
πŸ“…︎ Jan 03 2022
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Which actor drives the least?

Christopher Walken

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πŸ‘€︎ u/TR1771N
πŸ“…︎ Jan 18 2022
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What did Spartacus say when the lion ate his wife?

Nothing, he was gladiator.

πŸ‘︎ 9k
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πŸ‘€︎ u/rj104
πŸ“…︎ Jan 15 2022
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Pun intended.
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πŸ‘€︎ u/Sharmaji1301
πŸ“…︎ Jan 15 2022
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