CBM Tape Pi v1.6.0 with direct SD card access

CBM Tape Pi v1.6.0 finally supports direct Raspberry Pi SD card access (the additional serial connection to a PC is no longer necessary)!

Watch the video (demoing with a Commodore CBM 3032)!

Please use the more recent version CBM Tape Pi v1.6.1!

Read all about it at GitHub project page.

CBM Tape Pi v1.5.1 with SAVE feature

CBM Tape Pi v1.5.1 supports Commodore machine datassette SAVE command!

Read everything about the updated Commodore 8-bit datassette emulator using a Raspberry Pi at GitHub.

CBM Tape Pi – Datassette emulator

Send your PRG files via serial interface connected to a Raspberry Pi (emulating a datassette/tape drive) to your Commodore machine with my solution called CBM Tape Pi!

More details at the CBM Tape Pi GitHub page:

README (includes how-to)

Release 1.0 for Raspberry Pi 1 and Raspberry Pi 2

Have fun with your retro hardware!

Marc @ RhinoDevel

ImmoAnnuRechner

Der ImmoAnnuRechner in Aktion.

Um die tatsächlichen Kosten einer Immobilienfinanzierung per Annuitätendarlehen berechnen zu können, habe ich einen extrem einfach gehaltenen Rechner implementiert, den Ihr per Browser aufrufen könnt:

ImmoAnnuRechner – Website

Der Rechner funktioniert folgendermaßen:

Veränderbare Eingaben sind:

• Kaufpreis.
• Diverse Nebenkosten (%).
• Eigenkapital.

=> Damit wird das benötigte Fremdkapital berechnet.

• Zinssatz (%).
• Anfangstilgung (%).

=> Dadurch werden dann die restlichen Ergebnisse berechnet, u.a.:

• Monatliche Rate.
• Laufzeit.
• Gesamtzinsen.

“Klickt” man sich aus einem Eingabefeld “heraus”, werden alle Werte automatisch erneut berechnet (also aktualisiert).

Die aktuellste Beschreibung und den kompletten Source Code findet Ihr unter:

ImmoAnnuRechner bei GitHub

Viel Erfolg beim Immobilienkauf

Marc @ RhinoDevel

Commodore PET/CBM 4032-32N

Enjoy these images of my Commodore PET/CBM 4032-32N mainboard! It is a 8032090 type of board, you can find the schematics and further documentation here.

JavaScript: Convert number to binary (string)

Create a string holding the binary representation of a number (that is initially converted to a positive integer) with JavaScript:

var decToBinStr = function(n)
{
    var s, i;

    if(n===0.0)
    {
        return String(0);
    }

    i = ~~Math.abs(n); // Positive integer wanted.
    s = '';
    do
    {
        s = i%2 + s;
        i = ~~(i/2); // Integer division.
    }while(i>0);
    return s;
};

The function above creates the binary representation as one would do it with pen and paper.

I implemented it this way to show how you can do it in any programming language.

But if you are interested in a “better” way to do this with JavaScript:

You may also use the >>> (zero-fill right shift) operator to achieve this (or something almost similar..) with less code. See Mozilla and stackoverflow.com.

Atom cheat sheet

I recommend the open source Atom editor – especially for software developers.

Here comes my Atom cheat sheet that should be useful for everybody who is already accustomed to standard text editor controls, but starts using Atom (the shortcuts may be a little bit different, if you are not using Windows, but Linux or MacOS):

CTRL+SHIFT+P = Command Palette

CTRL+T = Fuzzy Finder

CTRL+B = Fuzzy Finder in buffers.

CTRL+, = Settings View

CTRL+TAB / CTRL+SHIFT+TAB = Cycle through panes.
CTRL+K -> UP/DOWN/LEFT/RIGHT = Split panes in some direction.
CTRL+K -> CTRL+UP/DOWN/LEFT/RIGHT = Move through panes in some direction.

CTRL+W = Close pane item (tab) / empty pane / window.

CTRL+LEFT = To beginning of word.
CTRL+RIGHT = To end of word.
CTRL+HOME = To top of file.
CTRL+END = To end of file.
CTRL+G = Move to row (and column).
CTRL+R = Move to a symbol in current file (e.g. a method definition).
CTRL+M = Jump to the bracket matching the one adjacent to the cursor.
It jumps to the nearest enclosing bracket when there's no adjacent bracket.

CTRL+ALT+F2 = Set/unset bookmark at current line.
F2 / SHIFT+F2 = Cycle forwards and backwards through bookmarks in current file.
CTRL+F2 = Move to a bookmark in project.

CTRL+SHIFT+LEFT = Select to beginning of word.
CTRL+SHIFT+RIGHT = Select to end of word.
CTRL+L = Select entire line.
CTRL+ALT+M = Select all the text inside the current brackets.

CTRL+J = Join the next line to the end of the current line.
CTRL+UP / CTRL+DOWN = Move the current line up or down.
CTRL+SHIFT+D = Duplicate current line.
CTRL+SHIFT+K = Delete current line.
CTRL+BACKSPACE = Delete to beginning of word.
CTRL+DEL = Delete to end of word.

The original source for all the shortcuts above is the Atom Flight Manual.