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Many published programs in Basic used REM tricks to hide content. Some listings looked really funky to look at. The other thing you can do is study the tokenization format of BASIC and peek/poke into the BASIC memory area to change line numbers and do othe

Very nice! Great job! I have one question: Would that work with c64 plus/4 as well? I mean the pinouts would be compatible?

Sorry but Kernal is to slow for our Demos, Intros aso

I am not a C++ programmer, but I know marco assemlers for the C64. To me, it feels odd to use all these definitions and use of them inside the source code, before compiling. I do not wan't to learn C++ so could you use a more familiar assembler than Microsoft C++ environment. Simply a text editor, like notepad, but preferably one that does autocorrection so you do not need to write # for absolute or $ for addresses, the editor can do that automatically. And that you can turn that function on or off by a menu selection (under copy, paste, etc).

Good Kernal & Basic from MC tutorial.

Couple of magazines that had a lot of good stuff for commodore and apple etc. Compute, compute gazette, transactor, byte (magazine) I got some of these on a microfiche format Bank magazine had a listing of the hp3000 version of adventure Compute and compute gazette if I remember right head several full programs for things like a word processor and a spreadsheet. I use these to get through high school

I REALLY LOVE MY C64 ❤❤❤ FOREVER ❤❤❤❤

This book + C64 without any unnecessary diskettes, memory cards and cassettes. Ideal for an evening when it's raining outside or it's cold and cloudy.

Excellent Josip. Many thanks for this very nice and intensiv review. Holger

I have been considering getting this book for a long time and your review clinched the deal. Thanks for an informative and thorough review.

Nice review and video. Thank you!

Excellent book review! Thanks for sharing

Looks fascinating. Ordered.

There are routines in ROM that move the contents of memory up, or down in the address space. They are used when you add a BASIC line in the middle of a program so that each subsequent line is moved to a higher address, and then everything is re-linked. Can you make a video showing how to use the ROM routines to move data around to any destination you want? Some programs I've seen move screen memory 40 bytes up, so that the text on the screen scrolls downward on the CRT instead of upward. God bless, and have a fun time with the computer!

Hi, nice job explaining and implementing mandelbrot set in our beloved C64. I have couple of ideas maybe you can try yourself. 1, you could reorder collors to get some nice gradients, I chose 8 colors and changed iteration to 8, but it could be easily changed even to all 16 colors, but for small iteration count it is not necessary. important are to get smooth color transition ---------- 2 dim a(7): for i = 0 to 7;read a(i):next 3 data 0,9,8,10,7,3,14,6 ... 160 for i=7 to 0 step -1 .... 230 poke 55296,a(i) --------- idea is from wikipedia where its used just 16 colors in 2 gradients 2. I saw your other video about 10 print chr 223 and chr 233, and it gave me idea to try that here with mandelbrot and i was very happy with result. I used for left upper and lower right part of screen chr(233) and chr(223) for other two quadrants. Then I combined that with black background (bouth 53280.0 and 53281,0) and chose border at midle of mandelbrot set at x=28 (not 20 :-)), somethin like this: --------- 220 if (py<13 and px<28) or (py>=13 and px>=28) then poke 1024+p, 233 220 if (py>=13 and px<28) or (py<13 and px>=28) then poke 1024+p, 223 --------- Love your videos, keep up the good work. Lijep pozdrav!

Is there a graphics package for this version of C? I converted an Atari Basic program to Commodore Basic and the lack of graphics commands in Commodore Basic made it very difficult and slow performing. Of course I could have added multi color, but compared to the Atari's graphic commands, reproducing the bitmapped graphics was much more difficult than it needed to be. With this C, can you specify an X,Y location and plot a point with or without color information?

Is this real?

I am surprised :-)

The content of the video is great, but please try to improve your mic quality, as you're barely audible.

The right spelling is: Kernel

That was some gathering guys! Thumbs up!..

Nice and simple, but unfortunately with the C64, a simple CPU reset will not get you out of some persistent software. Too long to explain here but it is about how the reset vector is set and simply resetting the CPU will only make it jump to where the programmer wants it to jump. So, some clever people came up with something called "EXROM Reset". It involves using a second line (PLA EXROM pin) and pulling both the CPU reset and the EXROM low, but releasing CPU a little before EXROM. There is a good video here, th-cam.com/video/OV5tNYhqQ7w/w-d-xo.htmlsi=rTxRNl2_RsN0OVai which explains it much better, also check the follow up video on the same subject.

I still love the C64 and I used to program it over 30 years ago, but since I despise math I didn't get to advanced stuff. Seeing this code here and all that math makes my stomach turn. But the end result is amazing!

Never messed around with Morse Code stuff on the C64, seems cool. Is there anything the C64 can't do?

Really nice, and like many others i would have liked to have such a cartridge back in the days. I love your trick at the very end :) thinking that it might have been possible to parse the basic line holding the "*=" directory and dynamically generate the buffer data in the very last line so that one can assemble and run at any memory location. Awesome stuff !

Does this basic assembler lack comment or rem features? If would be useful in these videos. Really useful. You know that tone left on at about 55:05? RunStop Restore fixes sound/noise too.

Always, ALWAYS show what the program does first, THEN the source.

Programming definitely is a LOT of fun. I find it more fun than playing games

If you made this Donkey game in 6502 Assembly (a.k.a. Machine Language), then you could get the game's action to REALLY speed up -- to the point where it becomes impossible to avoid hitting the donkeys! This would be a good demonstration of the capabilities of 6502 Assembly. Of course, Donkey in 6502 Assembly would require many more lines of code than the BASIC version; as 6502 Assembly is a very low-level language.

When I did programming on my C--64, I used BASIC a lot, much faster to write software, but I also used assembler a lot too, because BASIC would be way too slow for certain things, so I mixed both, I did BASIC and assembly for some routines and embedded those routines in my BASIC program through the SYS command. I did some pretty impressive and fast BASIC stuff this way - It was very useful for BASIC programs with background stuff, through the use of interrupt routines in assembler.

why not jump to 20 ?

Very interesting video. The Kernal contains indeed fun to use ready-to-go routines !

19:50 I would probably use JSR $FFE4, then BEQ LOOP. That way you can exit by pressing any key. 31:03 This effect only works on PAL C64s. On NTSC machines, it just displays somewhat random garbage.

I imagine discovering RunStop/Restore is going to change your life. I can't imagine not having that available! It was essential in my experience. ProTip: sharp quick taps on the Restore key. It's weird that speed of tap can make a difference sometimes but it really does. Gotta be in how downside transition of the signal generates the NMI.

nice examples on how assembly works. Thx

Very nice video.

My first computer had a hex keypad and allowed to enter machine code directly. No assembler needed. A rough start, but after that you are afraid of nothing anymore 🙂

Love some PETSCI art

As an ICT-professional, also very interested in retro-computing, I see many videos about different computer & network stuff on youtube and other media. I must say that this one is amazing. You explain this in a professional way. Lots of video's have lots of hesitating as if the teacher sees what appears on his screen for the first time. Not in your case. You master the knowledge perfectly. This video gave me lots of ideas and teached me stuff I was looking for. Thank you very much.

Excellent video! I like the Mikro assembler as well, i'm definitely going to try that soon

KERNEL, no A!

Interesante información sobre Commodore 64

What's a kernal? Do tell.

Very well explained 👍 enjoyable stuff ❤

This is like ”stupid pet tricks”, except a generation or two later :-) Lots of fun stuff, thanks for this, I enjoyed it a lot!

You have to turn off the computer just to get out of that 4096 loop? Why won't the stop/restore key combo work, even though I've seen it stop plenty of ML programs before, without your having to look for a press of "stop" or "stop/restore"?

Haha, wow, interesting way to write an ML assembly: using a BASIC listing as your playground (but then still having to have the underlying programmer assemble it).

JCR? What's that, especially when you typed "JSR" while saying it?

Background music ruins this video. Sorry but i couldn't watch it. Thanks for making the content though.

21:12 there is a bad edit about PAL jiffy timing. Can't tell if you are saying is same 60Hz for PAL or 50Hz. I would read the text description onscreen but your PIP narration window blocks it.