6502 assembly hello world

What is included in a 6502 kit?
The 6502 kit above includes all the parts to build this (plus a few extra buttons and LEDs to give you some options for I/O.) And here's the schematic for the computer with the 6551 UART providing an RS232 serial interface. The 6551 and MAX232 chips shown here are included in the serial interface kit above.
How do I assemble a 6502 assembly language?
This is the extension that will recognise the 6502 assembly language, colour code it, and allow us to assemble and run it. Run VS Code. Search Extensions for Beeb VSC. Install it. Create a folder called _bbc-micro _somewhere suitable. Create a file in that folder named: test.asm and then copy in the source code below, before saving:
Is there a schematic for a 6502 computer?
Here's the schematic for the computer—or at least as far as I went with the initial series of videos. The 6502 kit above includes all the parts to build this (plus a few extra buttons and LEDs to give you some options for I/O.) And here's the schematic for the computer with the 6551 UART providing an RS232 serial interface.
What does bit mean on a 6502?
BIT: Set to bit 6 of the input. Other: The original 6502 has an external pin called "SO" (Set Overflow) that hardware can use to make the V flag set. The purpose is to react to hardware events quicker than an IRQ. Most common 6502 compatible platforms do not have anything that uses this feature, or do not use it.

Download The Tools

Next, download a BBC assembler and emulator. The first tool is what will turn your 6502 assembly language into machine code and the second will run it. For the former, I just cloned the repo into a folder and the other was installed via an installer. logicalmoon.com

Add The Paths

Make sure paths to both are in your PATH environment variable. Control Panel > System and Security > System > Advanced system settings > Environment Variables… at least on a Windows PC.After that, click on Path, then Edit…Add two new path variables pointing to the directories you installed the tools in, above. OKyour way back out. logicalmoon.com

Installing The Extension

This is the extension that will recognise the 6502 assembly language, colour code it, and allow us to assemble and run it. 1. Run VS Code. 2. Press Control-Shift-X. 3. Search Extensions for Beeb VSC. 4. Install it. logicalmoon.com

Creating The Assembly File

Create a folder called _bbc-micro _somewhere suitable.Create a file in that folder named: test.asmand then copy in the source code below, before saving: logicalmoon.com

Assembling The Code

Make sure you are on your source file and press F10, then choose test.asm. This will create a build target for you.Press F7 to assemble the code.Lastly, press F9 to run it. logicalmoon.com

The Output

If all the above went to plan (and I hope it did), you should have something as spectacular as this. Pretty amazing? I think so :-) For those of you that are interested, let’s talk about how the code works, though please note this isn’t meant to be a tutorial in assembler - just a taste. The basic idea is this: we are going to take each letter of

“Hello world” from scratch on a 6502 — Part 1

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