Denial

Okay, sorry for the double post. I have found my mistake. The value 1/Z ist calculated in a range from 4-255, if we reduce it to the maxium x value of 168 the routine works fine. Additionally, a second table with 1/Z for Y should be created. :mrgreen: PROJTAB ;byte $FF,$F0 ; 255, 240 ;byte $E8,$D5,$...

I still have some questions about the 65C02 processor and its instructions.

STZ $20
is the same like
LDA #$00 / STA $20

PHX = STX $FB
PLX = LDX $FB

This ist not clear to me:
BRA XXXX

CLV
BVC XXXX

or can i write
JMP XXXX

***

Hi, I found a great example of the 3D Stars on the following page. https://8bitshack.org/post/starfield/ After transferring to the VIC 20 I ran into some problems. The program collapses at some point. If anyone has the time and desire to take a look at it that would be really great. Many greetings a...

I like this demo much!

Hello, i have converted the 3D Stars routine from the fridge http://www.ffd2.com/fridge/chacking/c=hacking16.txt to VIC BASIC with the MG expansion from Mike. It is so slow. :shock: Does anyone have an idea how to speed this up in BASIC? This is the original code. 10 rem starfield 15 mode16:gron16 2...

Hi, i think the Commodore VIC20: Software Sprite Stack library is the best address for this. We have no in game scrolling, except when the level changes and I can do that in Assembler. ;-) Or see the book "Programing the VIC" from Compute! on page 390 and 400. I found a comparison video fr...

Hi @ all,

I am very interested in implementing Bubble Bobble on the VIC. How can I support?

BR
Sven

I have an TI-84 Plus here on my desk.

https://en.wikipedia.org/wiki/TI-84_Plus_series

The Z80 is alive!

My Assembler load the program with Load"Demo",8 ant not with ,8,1.
Could that be the error?
And how do I change my basic stub to load the program with .8.1?

Good morning, thanks a lot for your help. Bur, it wont run. If i run the program from my assembler compiler the same failure occurs. The data of the sprite is not correct. If i change the register $9005 from $F0 (240) to $FE (254) the start text cannot be seen. And vice versa I see the text but the ...

Hello,

Is there anyone out there who can help me with my question? I can't find the error in the program or in my thought process.

Thank you

Who decides what legitimate applications are?

I use the line routine from Bitbreaker from codebase64. https://codebase64.org/doku.php?id=base:bresenham_s_line_algorithm_2 The results are very good. Line x0,y0 to x1,y1 Cycles in total xxxx per pixel yy 00,00 to 99,00 5219 per pixel 52 00,00 to 00,99 5219 per pixel 52 00,00 to 99,99 5516 per pix...

… but the Demo is very impressive.

Hi,

during my search of the best line algorithm i found this website.