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 ...
Search found 8 matches
- Fri Jan 30, 2015 3:16 pm
- Forum: Newbies
- Topic: breakpoints in code (ca65, VICE)
- Replies: 10
- Views: 2398
- Tue Jan 27, 2015 10:49 pm
- Forum: General Discussions
- Topic: A homebuilt MOS 6502 based microcomputer system
- Replies: 8
- Views: 1025
Re: A homebuilt MOS 6502 based microcomputer system
Reminds me a lot of the TRS-80 Model 100
- 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 ...
- 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 ...
- 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 ...
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 ...
- 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 ...
It seems like BRK is half of what I want (convenience-wise), but it will do. I was ...
- 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 ...
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 ...
- 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 ...
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 ...