In 1983, when I was 13 years old, I created a TRS-80 program that recreated the Nintendo Game and Watch Donkey Kong Jr handheld. It resulted in a simple game that very basicly captured the gameplay of the original. The look and feel was horrible, mostly because of the graphical limitations of the TRS-80 model I.
But hey, in a time that most of my friends didn't even know what a computer was, I was very proud of what I accomplished.
To preserve this effort from my youth, I have uploaded the game and the source code in BASIC here.
In the photo below you see a single page of the listing as I wrote it. As you can see it was entirely written down by pencil because I didn't have printer.
In the photo below you see the original graphics design of the game.
As you can see the screen is build up from 16 lines of 64 characters each. A character is subdivided in 6 blocks: 3 vertical and 2 horizontal.
This means that the graphical resolution of the screen is (64x2) x (16x3) = 128 x 48.
The source of the game is written in BASIC and the listing is in DKJR.bas.
The game is added to an autorun disk: Donkey Kong jr.dsk.
The game can be played using the SDLTRS TRS-80 Emulator.
The SDLTRS emulator can be downloaded on the SDLTRS Website on SourceForge.
The SDLTRS emulator needs the model specific romfiles which can be downloaded here: trs_roms.zip.
Place the model specific romfiles in the installation folder of SDLTRS.
Place the Donkey Kong jr.dsk also in the installation folder of SDLTRS.
Start the sdltrs.exe executable to start the emulator.
Press F7 to open the SDLTRS menu.
Select the option 'Floppy Disk Management (ALT-D)' and press Enter.
Select the option 'Disk 0:Empty' and press Enter.
Select the 'Donkey Kong jr.dsk' and press Enter.
Press Esc several times to return to the boot screen.
Press F10 to restart the emulator and the game will be started from the auto start disk.
A video showing the game can be found on YouTube:
