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Hi, I would love HRTmon on my 3.2 ROM however i'm not skilled enough to do it myself, do you know where I can buy one from?

I know I am commenting on a 3 years old video but I noticed something. With BASIC 1.0 ROM, the computer reports 47870 bytes of RAM (15:08), but with BASIC 1.1 ROM, it drops to 37631 (14:32). This doesn't look right to me. I thought Oric 1 and Oric Atmos were the same except for serious bug fixes in the ROM code, I wouldn't call this a fix if the new ROM just makes 10KB of RAM disappear. Is this normal?

is this clone of ZX Spectrum 48?

@26:07 is where my confusion began! This hack has been known for ages, so your surprise felt unnatural to me. Maybe this is because you were not playing more than debugging. Nevertheless, it's worth noting that there are several combinations that trigger secrets in Nemesis/Gradius 2 (including the one you were reverse-engineering and the one that "surprised" you), among others.

Thank you for the video and your effort. I appreciate it. However, I found the background music to be too loud while you were explaining. The music itself is great, but I lost focus several times due to its volume.

I have the source code for the classic Paranoimia vector intro with the blue scrollers at top and bottom with an iconic soundtrack.. interested in making a breakdown of how it was made?

Amigamon, Devpac, Genam and REsource were the tools to achieve this on the real hardware back in the day. If you were a "lamer" you'd use one of those freezer cartridges like Action Replay... it made it faster but felt wrong 🙂

I was sent two DM-16L calculators by the manufacturer, neither fully work - no response using SET COMPL

I was at 13 or 14 Age ,i never forget, now i am 50 years old still i Love this game

This is like the worst disassembly and understanding of Amiga code I've ever seen. It literally made me scream at some of the insane things you were saying and it's completely obviously you have NO idea how the boot process works or why the copying takes place. Properly insane watching how much you didn't understand. You should probably stick to Python because Amiga 68k really isn't your thing.

A port has been made to the PC of this awesomeness of a game. Think cost something symbolic like a dollar or two. Good stuff.

Another quick point about Dungeon Master, by having a lot of fuzzy bits on the disk, they are able to make the trick work across virtually all drives because a small RPM difference might make the transition settle on one state or the other, but some of them will always be unstable if you have enough copies of the same trick. Basically, the trick with any disk-based protection is to write something on the disk that is difficult or impossible to write with a consumer drive, but it also needs to be something that you can test for. The simplest method is a bad sector test, where the disk comes with a malformed sector that causes a read error. On many systems, there is no way to write such a sector on a copy. The methods vary from system to system because sometimes everything goes through a disk controller IC and sometimes you have a CPU directly bit-banging a drive mechanism giving more flexibility to copy programs.

Amazing, like back in the days 😁👍

This is SO not the way this game should be cracked. The easiest way would have been to use ReSource and just patch out of the code that asks the question, which is what I did. Literally, about 10 minutes work. No Action Replay needed. The other way is the intercept the pressing return after the code is entered to see where it's checked, if I actually wanted to look at that code. Good video though, but you made it WAY harder than it needed to be with a lot of guesswork because you didn't understand the code or what it was doing. Also, you can see that the game was written in C.

I wish this video was in English or I spoke French 😢

Man this blew my mind! I do recall watching something about drive trickery over the years but not back then - this was witchcraft! Could you please cover more games with dynamic protection - like, I think, Gods where you could play it but wouldn't see the full ending if it was a copy?

Thanks for the video (I've seen your action replay one too) - I am familiar ish with Linux and was just wondering what you did that could not be done on Windows? I understand the native filesystem support for the amiga and other OSs, but what else of what you showed is not possible on windows/only possible with third party software? Merci!

Just discovered this and found it really interesting to learn a lot here! If you have time, I'd love to know - using the Action Replay, theoretically is it possible to find the original source .iff graphics files for sprites / background tiles etc within a session? For instance, I'd love to have a crack and making new background iff's for some of my favourite shooters... though I imagine this is a more complex endeavour requiring some knowlege of Assembly to recompile. If there were a straightforward way to replace the files the game is calling, 1:1, with our own files, this would be a really fun exercise!

Very interesting thanks!

Nice to see another one saved. Thanks for the link to my site.

A minor point regarding RPN, X register is the display. When you push ENTER the number in the X register is copied to the Y register, so you have the same number in the X and Y registers. You can see this if you place a number in X hit ENTER and then an operator. As I'm sure you know RPN was almost exclusive to HP and to their credit they stuck with the format. It's incredibly easy to learn and so much easier to use when working with larger calcualtions, usually using less keystrokes making it not only less error prone but faster too Many thanks for the video I found it useful and well represented

I used to have a v1 AR version but unfortunately I sold it together with my old 1.2 a500 when I had to raise the money to buy a pc. Some years ago I rebought both an a500 and a v3 AR like this one, it's great fun. ps. at 11.02, I think that subi.w is immediate and not indirect.

I came here because youtube proposed to me a video about Brain, the first virus on pc, so I remembered that the first one I saw personally was the Sca virus on my beloved amiga and gave a look at its source and googling from there I landed on your Lamer Exterminator dissassembly video. I love your videos! (btw iI think I can recognize them blurred on the background, I also have those same Hakko soldering iron and Siglent bench multimeter :) )

<3 Datel! best unofficial accessory maker ever!

This was where Cyclone/ X-Copy and the SUPERB Super-AMI-Card copier was the dogs for things like this.

Can you analyze Beol and Bobek, which were made by members of the IKX virus writing group?

Wine est un programme extraordinaire, et avec les logiciels tels que Lutris il n'a jamais aussi simple de gérer les "prefixes" spécifiques pour tel ou tel jeu. J'ai découvert Wine en 1997 lorsque le magazine Amiga Dream s'est ouvert à l'informatique libre, jusqu'à m'y mettre réellement en 1999. Ce que je trouve extraordinaire c'est que je sais que si certains vieux jeux ne tournent plus ou mal sur Windows, il y a de fortes chances que je puisse les faire tourner sans soucis avec un Wine bien configuré. Et pour ça, selon moi, Linux est la meilleure plateforme pour faire tourner les anciens programmes Windows !

C'était passionnant ! Merci d'entrer dans les méandres de ce qui était, dans mon enfance, un écran aussi cryptique que commun. À-t-elle point que la fameuse Guru Meditation (dont j'ai compris que plus tard le jeu de mot) est probablement l'une des choses qui représente le plus l'Amiga dans mes souvenirs XD

This is just BEAUTIFUL!!! It's a pity we didn't have this content back in the day. @retrolabo I would love to see how you continue the video. I mean, it would be amazing if you show how to patch or repack the game. Please, please, please :) Thanks so much!!

So nice to remember the wonderful engineering calculators of yore. And so nice to remember all the French engineers I have worked with. If you have ever had the pleasure of working with a French engineer, you know exactly what I'm talking about!

fabuloso

Content de te revoir, vivement la prochaine vidéo.

And there is a new addition to the mix, the PX-16C calculator. I've got it and the PX-15C in kit form, which I may leave as is. And you also left out the TI-66, which is famously slow and can be found for less than the Casio. Thanks for the detailed comparisons, and I do like the JRPN 16c!

Aïlle have understoude nirly èvery singue fromeux ouatte you sède !! Hand aïlle sink zat you are foully wraïte

That takes me back. 👍Still miss that thing & the control ya had with it!

Nice to see you are back :)!! i've been missing your videos

Merci pour cette vidéo. Maintenant je me souviens des programmes en ligne de commande. Je viens de réutiliser Hatari (emulateur Atari) pour créer un disque dur et le copier sur une compact flash. Pour ma part Wine me crée des soucis, je vais retenté l'install ainsi que son utilisation (Linux Mint) peut-être que maintenant cela fonctionnerat. Merci de refaire des vidéos en tout cas.

Very cool 👍

I dont know where you got the Disk in the trash method to eject it, but you dont need to do that. All you have to do is Single-click the disk, then hit File, then Eject.

would be cool if you would do a follow up like you say in the end. the options are all intersting

I remember watching the power LED on my A500(rev6) flicker."dark,bright". And I knew a "Guru meditaion" would soon show up

I Suscribe your Channel. Like

These calculators are Legendary!

30 years late out of the gate.

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Oooooo this is awesome! Great repair series with added super genius sound-chip programming What a great feat you have accomplished.😀 I just closed up my first Oric atmos and yes.. suddenly the keyboard failed 😆 Bought a second hand analog oscilloscope and I'm ready to rumble. The plastic restoration tips are also very good. I also have 4 QL's and 2 zx spectrums here that I will try to fix. Where did you find all those ram chips? I found them from TI on the internet, cheap, but shipping is 75$🙃 I'm very low budget and have to sell what I fix in between to buy more supplies. But it's a quest. Thank you for your very worthwhile video's. Highest regards, Mac😘

Hi love that someone is doing more on tje actionreplay cart is there any change you could semd your video to us as i like to learn more, manythanks Will click the watch later keep it going my friend best regards

hi where did your case for it come from please

The complexity of the copy protection for Dungeon Master was NEVER in the format of its protection track, its simply from a cracking point of view, not interesting nor important which is what these kinds of videos seem utterly fixated upon. The ingenuity was the way it was implemented in the CODE, not on the disk! Hiding protection read routines in a graphics file was unexpected, logically, any being nosey in the code would expect all code to be in the.....code file! It also had semi decent checksums in the code, which whilst checksums were not new on any format, they were implemented well, having different failures that were not automatically detectable by the would be cracker, modifying the game to operate differently rather than simply display a "protection failed" message or have the computer crash or exit instantly.