Search found 8 matches

by Dvorak
Fri Jan 30, 2015 3:16 pm
Forum: Newbies
Topic: breakpoints in code (ca65, VICE)
Replies: 10
Views: 2398

Re: breakpoints in code (ca65, VICE)

Yes, you can almost do that. You have to cope separately with branches and other operations which disturb the progression of the program counter. I think at least one of the Apple monitors did exactly that.
Edit: no, it didn't quite do that. It copied the instruction-to-be-executed into RAM and ran ...
by Dvorak
Mon Jan 26, 2015 11:21 pm
Forum: General Discussions
Topic: Introduce yourself
Replies: 716
Views: 418293

Re: Introduce yourself

Interesting trajectory - thanks for the story. We often lament that today's apps and tablets are too much a sealed unit for anyone to learn how things work. Getting started with game cheats and the like shows that there are still cracks in the armour for the interested person to get inside and see ...
by Dvorak
Mon Jan 26, 2015 4:17 pm
Forum: General Discussions
Topic: Introduce yourself
Replies: 716
Views: 418293

Re: Introduce yourself

I started using computers when I was 4 in 1999; I had learned to speak in the same year. Still in 99', my first computer was something like a Compaq Presario (Windows 3.1). I had fun by just clicking things on the window manager, however I soon graduated to playing video games like Doom I/II and GTA ...
by Dvorak
Mon Jan 26, 2015 6:11 am
Forum: Newbies
Topic: Getting young people into 6502
Replies: 118
Views: 23447

Re: Getting young people into 6502

First off, welcome to our 6502 world.
Thank ya'.

GCC is not tied to any one operating system. In theory, GCC can be built on any machine that has an ANSI C compiler and suitable I/O libraries.
The way he said it made it sound like if you had Unix on a 65xx you would have to port gcc.

Give it ...
by Dvorak
Mon Jan 26, 2015 5:28 am
Forum: Newbies
Topic: breakpoints in code (ca65, VICE)
Replies: 10
Views: 2398

Re: breakpoints in code (ca65, VICE)

Interesting that the BRK instruction increments PC by 2. I was wondering why PC was never at the BRK point itself! This will help me a decent amount. Would you happen to know why the BRK instruction increments PC?

It seems like BRK is half of what I want (convenience-wise), but it will do. I was ...
by Dvorak
Mon Jan 26, 2015 12:10 am
Forum: Newbies
Topic: Getting young people into 6502
Replies: 118
Views: 23447

Re: Getting young people into 6502

@cr1901
And yet despite running at 500MHz+ as you say, some applications are still slow, dreadful programs. It seems these days that the solution isn't to create better code, it's to get a better computer. What a crock. And people wonder why their OSes are bloated.

I probably wouldn't go as so far ...
by Dvorak
Sun Jan 25, 2015 11:46 pm
Forum: Newbies
Topic: breakpoints in code (ca65, VICE)
Replies: 10
Views: 2398

breakpoints in code (ca65, VICE)

Hello everyone,

edit; perhaps this should be in the programming section. I saw 'newbies' and I figured that it would be best here for some reason.

I've been delving into the realm of 6502 assembly recently, and my code has gotten so large that it's becoming rather difficult to debug. I have coded ...