6502.org

Hi all!

In the last month I have been writing C64 emulator from scratch in JavaScript.

I have decided to write a couple of blog posts detailing my experience as I go along.

One of goals is to eventually be able to load a game from a .tap file (e.g. tape).

For those interested here is the link to my series of blog posts:

http://emufromscratch.blogspot.co.za

Any feedback, comments and suggestions welcome!

Good to see that Johan! I can't get the RSS feed on your blog to work, but I've added you on G+.

Oh, and welcome!

Thanks Ed

I must admit I am quite new to blogging, not even to speak of Blogger

Anyway, I was quickly sniffing around and found that there is a way to get RSS feed to work on Blogger. It was quite a mission to find this out!

To get a RSS feed on Blogger Blog you would use the following form:

http://blogname.blogspot.com/feeds/post ... lt?alt=rss

So my Blog would be: http://emufromscratch.blogspot.com/feed ... lt?alt=rss

That's great - subscribed!

Welcome. I was able to run your Java emulator, very impressive indeed. It starts up okay but I didn't have time to sift through games to see which ones work. (One loaded but didn't run.)

Looking forward to the JavaScript version, good luck.

Thanks joe7!

While developing the Java Emulator I only tested a handful of .TAP files.

The ones I found to work was the following:

Dan Dare - Pilot of the future (1986)
Blue Max
Up 'N Down

I've taken the liberty of putting the first blog post's development into an online sandbox:
https://jsfiddle.net/pxx8nr5f/
(with minor tweaks for convenience)

Hi All

I just published Part 5 of this series : Comparisons and Branching

Here is the link:

http://emufromscratch.blogspot.co.za/20 ... ching.html

Thanks @BigEd Nice tool to have in the JavaScript ToolBox

Hi All

I just published Part 6 of this series: The stack and related operations

Here is the link:

http://emufromscratch.blogspot.co.za/20 ... tions.html

I just released Part 7 of my emulator in JavaScript from scratch Series. In this series I finish off the CPU part of the emulator. In subsequent posts I will be covering topics like running the Klaus Test Suite on the emulator and Booting the C64 with its ROMS.

Here is the link http://emufromscratch.blogspot.co.za/20 ... tions.html

There's a gotcha in the transfer instructions - check TXS! It doesn't set the flags.

Good spotting! It actually took me to run the Klaus Test Suite (presented in my next blog) to spot this error.

Nice read!

I have just released part 8 of my emulator in JavaScript from scratch series.

http://emufromscratch.blogspot.co.za/20 ... suite.html

In this series we will be running the Klaus Test Suite against our emulator, giving some surprising bugs!

In this blog I will also be extending the Debugging functionality of the emulator, so all in all this is a bit of a lengthy blog post compared to my previous posts.

So, have a cup of coffee handy