Category Archives: Screencast

Catch the WP Guru Video Podcast where Complex Stuff gets made extremely simple. These are screencasts on a variety of topics, such as WordPress, Dreamweaver, iOS Development and a lot of other super complicated stuff.

Check it out on iTunes
or subscribe with your favourite Podcast client

Blue Yeti vs ZAFFIRO – Microphone Comparison ASIN B07BVRQD8G

I was looking for another desktop USB microphone for my second desk. Currently I’m using a wonderful Blue Yeti with my Mac on my main desk (or Studio A as we like to call it), and every time I do a screencast or podcast on my Windows workstation (or Studio B as we’d like to call it), I have to bring over the Blue Yeti.

So I discovered the ZAFFIRO Desktop USB Mic, for over $100 less. I thought I’d give it a spin – and I really like it. Here’s what I found after a couple of weeks of working with it.

Continue reading Blue Yeti vs ZAFFIRO – Microphone Comparison ASIN B07BVRQD8G

Catch this episode on my WP Guru Podcast:

ZAFFIRO Lapel Microphone comparison B074SF96X9 vs B0765NGK4N

In this episode I’m taking a look at two lapel microphones by ZAFFIRO. They’re both called “Lavalier Lapel Microphone”, and the description is more or less identical on both items – yet there are significant differences between these products.

I bought both of them back in March 2018, and given the sound quality and amount of accessories you get, for less than $20 each, these mics are good bargains for casual users. But no matter how detailed (or vague) their shop descriptions are, and no matter how hip the people in those pictures look, you can only really judge a microphone by what it sounds like.

In this review I’ll tell you all that I’ve learnt in my six months with the ZAFFIRO lapel mics.

Continue reading ZAFFIRO Lapel Microphone comparison B074SF96X9 vs B0765NGK4N

Catch this episode on my WP Guru Podcast:

How to take pictures with Photo Booth on macOS

In this episode I’ll show you how to take pictures with built-in and external USB cameras using Photo Booth on macOS. Photo Booth is the equivalent of the Camera application in iOS.

I will also explain how to export your images, where they are stored on the hard disk, and what you can do if the built-in camera gives you an error message.

For Ivy-Jo.

Troubleshooting

As I’ve explained in the screencast, if Photo Booth or any other app is giving you grief about there camera “not being available”, you can try to reset the VDCAssistant process on macOS.

To do this, open the Terminal app, then type the following:

Provide your administrator password when prompted, and without a reboot, Photo Booth should be working as it should. Thanks to Turn It Off And On Again for this tip!

Catch this episode on my WP Guru Podcast:

Discovered: Commodore 64C used in an auto repair shop (2018)

I’ve recently discovered a tweet that showed a Commodore 64C complete with green monitor and 1541-II drive, heavily dust covered, but still working and being used in a Polish Auto Shop. The picture itself was fascinating enough, but I’ve also discovered that it was a screen grab from a video – which I’m including here as well (had to replace the music with something royalty free).

You can find the original article here: https://www.trojmiasto.pl/wiadomosci/Warszatat-samochodowy-zaslynal-dzieki-26-letniemu-komputerowi-Commodore-n106004.html

The tweet I found is here: https://twitter.com/HistoryToLearn/status/928821265783250945

Enjoy!!

Watch the full course in one convenient playlist:
Catch this episode on my Commodore Podcast:

How to write a text input routine in Commodore BASIC

In this screencast I’ll show you how to write your own INPUT routine in Commodore BASIC. This comes in handy when you want to reject certain keys from being used when asking users for keyboard input. In my example I’m going to allow all alpha characters (A-Z), as well as SPACE, RETURN and the DELETE key.

Here’s the code:

Watch the full course in one convenient playlist:
Catch this episode on my Commodore Podcast:

How to embed images in GitHub Readme Files

In this screencast I’ll show you how to add images to your GitHub Readme files. You can use the Markdown or HTML syntax for this, I’ll show you both versions. Make sure to upload images to your own repository and provide the relative path to them.

Here’s the syntax:

In Markdown

In Markdown syntax, use the following example to embed an image:

In HTML

GitHub also supported the HTML syntax, which uses the standard IMG tag. Pasting HTML code in a website is always a little tricky, but let me try:

Should you have spaces in your file names, you can replace them with %20, just like in standard HTML (like “file%20name”).

Now go and make those Readme.md files look handsome!

Catch this episode on my WP Guru Podcast:

Flashing Border Colors on the Commodore 128 in Machine Language

In this episode I’ll show you how to create the iconic flashing borders on Commodore machines. Back in the day, when the system was loading, this was a nice way to indicate that the computer is busy doing something rather than being dead.

I’ll show you the principle both in BASIC and in Machine Language on the C128. The VIC-II chip is the same on the C64 though, so this will also work on the Commodore 64.

The same approach can be used on the Plus/4, however the addresses for the border and background colours are different (decimal 65305, or hex $FF19).

The VIC-20 is another story, as the border and background colour are changed using the same address (decimal 36879, or hex $900F). This link may help though: http://www.sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?t=5905

As always, enjoy 🙂

Watch the full course in one convenient playlist:
Catch this episode on my Commodore Podcast:

Programmatic Loops in Commodore BASIC

In this episode I’ll demonstrate how to use programmatic loops in Commodore BASIC.

I’ll show you how to use the FOR/NEXT loop (available in all versions of Commodore BASIC), as well as the DO/WHILE loops (available on the Plus/4 and C128).

Enjoy!

Watch the full course in one convenient playlist:
Catch this episode on my Commodore Podcast:

Flow Control in Commodore BASIC

In this episode I’ll explain the concept of Flow Control in Commodore BASIC. It’s kind of a video update of a post I did a while ago.

In essence, it means that we can tell the programme to take a different route in the code depending on a condition that’s met. We’ll explore the IF/THEN and ON… GOTO/GOSUB statements (available on all versions of Commodore BASIC), as well as the expanded IF/THEN/ELSE version (available on the C128 and Plus/4 only).

In addition, I’ll also show you how to use the BEGIN and BEND clauses that were introduced with the C128.

Watch the full course in one convenient playlist:
Catch this episode on my Commodore Podcast:

How to run Commodore BASIC as a Scripting Language on macOS

Did you know you can run Commodore BASIC v2 on your Mac and Linux systems as a scripting language? It’s true – thanks to the marvellous efforts of Michael Steil and James Abbatiello. They’ve adapted the original BASIC v2 as featured on the VIC-20 and C64 with additional routines so that it works natively on modern machines. It’s ingenious!

You can get the full source code on GitHub – it works a treat!

For those who don’t quite know what to do with it, here are some instructions that’ll help you get CBM BASIC up and running on macOS.

Download

GitHub provides a convenient way to either clone a repository on your local machine if you have GitHub for Desktop installed, or you can download a ZIP file and unZIP it somewhere on your system. Once done, you should see a directory structure that looks exactly like the repo on GitHub.

Compile

You need a few utilities installed your your Mac to be able to compile files. Downloading Xcode will ptovide you with an excellent (and free) IDE as well as the command line tools needed to do that (gcc, make and several other goodies). You might be able to bring those components in using the Homebrew package manager.

Using your Terminal app, navigate to your unZIPped folder. It includes a MAKEFILE so there’s no need to mess with any parameters. Enter “make” at the command prompt, and after a few moments you should have a file called “cbmbasic” without an extension in the same directory. That’s the binary for your Mac.

To make it executable, we’ll have to tweak the file permissions – otherwise our operating system won’t be able to run it. We’ll do it using the chmod command:

You can test if it works by calling the binary without any parameters like this:

If all goes well you should see something like this:

For easy access, copy the binary over to your /usr/bin directory. That’s where common command line utilities are installed on Mac and Linux systems. The added benefit is that the path to that folder is already in your local $PATH variable, and as such you can simply type “cbmbasic” from any location when you’re on the command line.

Here’s how to copy the binary over (this will ask for your administrator password):

Using Direct Mode

When you run the binary it will bring up something like the standard BASIC command prompt we’re used to seeing on the Commodore 64. There are however a few important differences between a C64 emulator and this implementation:

  • this is NOT an emulator
  • cursor keys DO NOT work
  • all commands typed in must be CAPITALISED

Other than that, you can start typing like on a real machine. Be careful with certain POKE commands though as those may call system routines that might not be implemented.

LOAD and SAVE commands have been tweaked to reference the command line structure. They work just fine, but will load and save files in Commodore file format (which is not clear text ASCII – more on that later). For example:

The above displays the directory of the current folder, much like it was an attached floppy drive. How cool is that? You can reference folders using both LOAD and SAVE just as if you were on the command line.

You can also type in programmes and run them – however the cursor keys won’t work, so there’s no screen editing options. Programmes SAVEd from direct mode cannot be loaded from the command line, only from direct mode (i.e. when launching the binary without parameters).

To quit direct mode, hit CTRL+C.

Running Programmes from the Command Line

The real power of this implementation can be seen when we run files from the command line. Those files must not be SAVEd from direct mode, but instead are simple clear text files. The extension doesn’t matter, but for good practice, let’s store them as .BAS files (much like shell scripts are stored with the.SH extension, or PHP files would be stored with the .PHP extension… you get the idea).

You can write standard BASIC programmes use your favourite text editor (like vi from the command line), or try one from the “test” directory that’s provided with the repository.

Imagine we had a file called “hello.bas” that we’ve created with vi, looking like this:

To run our file, we can simply define it behind the binary like this:

cbmbasic hello.bas

This will greet us with the “Hello World” message on the command line.

Running Script Files

Alternatively, we can specify the full path to cbmbasic at the beginning of a file (she-bang notation) and run it just like any other script file. Observe please:

#!/usr/bin/cbmbasic
10 PRINT “Hello World”
20 PRINT “from CBM BASIC :-)”

If the file was called “hello”, we’d need to change the permissions again so that the file can be executed:

Now we can run it like this:

Sweet – but I can’t work out how to compile this on macOS…

Fear not – I’ve got a macOS binary that was compiled on 10.12 “Sierra”. You can find it in my fork of the project. Check out the “binaries” folder.

Does it work on Windows? Or on Linux?

I’ve tested compiling and running this puppy on CentOS 6 and 7 with roaring success. The above steps worked fine for it, so I’m assuming it’ll work on other Linux flavours just as well (the beauty of portable C code).

According to the author, it works fine on Windows too – however I have no idea how to compile source code on Windows, so you’ll have to figure that out for yourself. I hear good things about Visual Studio  – if I work out how to do it, I’ll add it to the “binaries” folder on my GitHub Fork.

Can I write my own extensions to BASIC?

Apparently so – check our Michael’s site and repo for details:

  • https://www.pagetable.com/?p=48
  • https://www.pagetable.com/?p=35
  • https://github.com/mist64/cbmbasic

Right now, if you run SYS 1 from direct mode first, you can use the SYSTEM command (followed by anything you’d like to execute on the command line in “double quotes”) as well as LOCATE (followed by an x and y coordinate to place the text cursor) and WAIT.

Have fun hacking BASIC and letting it run with the blistering speed of modern CPUs 🙂

Watch the full course in one convenient playlist:
Catch this episode on my Commodore Podcast: