Denial

Hello,

in BASIC we write PRINT SQR(3) and get the result 1.73205081.

how can i print the sqr to screen with the ROM calls?

BR
Sven

Have Fun!

Hi Marco,

now it should work.
here are the two files from my above posts.

If you need some help please send a PM.

BR
Sven

Hi Michael,

thanks a lot for this explanation. That will help.
I wondered why i can not share my GUMBALL code with Marco in a nother post.

Thanks again for the warm welcome.

Best regards
Sven

Hi Marco,

i can not upload the files. I need some help from the admin, i think.
To Drag&Drop dont work.

BR
Sven

Here is another code snipet from easy 6502 * = $A000 dw ProgramStart dw ProgramStart db $41,$30,$C3,$C2,$CD ;ROM Header ProgramStart: sei ; Stop interrupt ScreenInit: ldx #16 ;We're going to copy 16 registers ScreenInitAgain: dex lda VicScreenSettings,x ;Get A parameter sta $9000,x ;Store to the vid...

; Important Sprite-Imation Registers ; SPRITE NUMBER ; FUNCTION 0 1 2 3 ; ----------------------------------------------------------------------------- ; Location of sprite data $02D0 $02D1 $02D2 $02D3 ; ; Position of sprite on screen (X) $02DA $02DC $02DE $02E0 ; ; Position of sprite on screen (Y)...

Hi at all,

is there some progress on the topic?
I am very interested in this sub routine.

BR
Sven

Have fun!

Hi at all,

greetings from Germany, Braunschweig.

BR
Sven

But i have a question.
Why can we use the data tables in the code? And why jumps the printing routine to the next data?
Is there an explanation about it?

BR Sven

Thanks a lot for the very good lession.

I read something in the KERNAL-ROM comments,...
It is also possible to jump directly to the PRINT ON SCREEN SUB ROUTINE $E742
This will save some cycles.

BR Sven

Have fun!

And here is a little better version with some upgrades. - Wait for Raster - Stop interrupt - faster keyboard inputs - use of zero page entries in stead of normal memory - faster and less memory - use of tables for very fast print on screen - more colors Use the keys k - right h - left w - up d - dow...

Dear Sirs, here you will find the GUMBALL maschine language game from the book Compute´s second book of VIC by R.S. Moser. This programm help me to understand the 6502 and VIC language. I hope it help somebody else. * = $1001 ; BASIC program to boot the machine language code db $0b, $10, $0a, $00, $...

Hello folks, I'm new to the forum and in the process of learning a little bit more about the 6502. Nick Morgan's page 6502 https://skilldrick.github.io/easy6502/ was a good place to start. I tried to port some programs to the VIC 20 from the http://www.6502asm.com page. Unfortunately I don't get it ...

Hello, after a lot of years,... here is my Basic Version of KC. It is faster then the original. Have fun Sven The SpeedTimer can be cleared, of course. 0 c=7812:dimb(12):l=c:n=36878:o=36877:m=102:p=32:h=160 1 k=8178:q=7746:z1=23:z2=24:z3=25:f=44:f1=45:f2=46:f3=47 2 e=1:e1=2:e2=3:sn=8157:ha=128:el=11...