SCREEN MANIPULATION: CLEARING SCREEN (USING CLS) (1)

This example shows how to clear the screen using the CLS command. First of all, the program will ask for a bitmap screen of 320x200 pixel of resolution with 16 colors, by using the BITMAP ENABLE command. After this, we set the background color to red using the command PAPER, and we clear the screen with a red color (RED). Then we wait for 2 seconds and we re-enable the TILEMAP mode. So we change the background to yellow (YELLOW) and, after setting the empty tile to the one with number 48 (lo "0"), we clear the screen again.

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SOURCE CODE ()

    BITMAP ENABLE (320,200,16)
    
    PAPER RED
    CLS

    WAIT 1000 MS

    TILEMAP ENABLE
    PAPER YELLOW
    EMPTY TILE = 48

    CLS

How to compile and run the example

The instructions here refer to compiling the example from the command line. For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile each single example with just one click.



Are instructions for your specific home computer / console missing? First of all, check if your computer is supported by clicking here. If so, since ugBASIC is a language which does not provide abstractions, it is possible that this example will not work on your target. If you think this is an issue, please click here.

Amstrad CPC 464, Amstrad CPC 6128, Amstrad CPC 664

In order to compile the example, type this command on the command line:

Linux

ugbc.cpc -O dsk -o screens_cls_01.dsk screens_cls_01.bas

Windows

ugbc.cpc.exe -O dsk -o screens_cls_01.dsk screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Atari 1200XL, Atari 130XE, Atari 600XL, Atari 65XE, Atari 800XE, Atari 800XL, Atari XEGS

In order to compile the example, type this command on the command line:

Linux

ugbc.atarixl -O xex -o screens_cls_01.xex screens_cls_01.bas

Windows

ugbc.atarixl.exe -O xex -o screens_cls_01.xex screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Atari 400, Atari 800

In order to compile the example, type this command on the command line:

Linux

ugbc.atari -O xex -o screens_cls_01.xex screens_cls_01.bas

Windows

ugbc.atari.exe -O xex -o screens_cls_01.xex screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Coleco Vision, Dina (Chuang Zao Zhe 50), SpectraVideo SV-603 VGA

In order to compile the example, type this command on the command line:

Linux

ugbc.coleco -O rom -o screens_cls_01.rom screens_cls_01.bas

Windows

ugbc.coleco.exe -O rom -o screens_cls_01.rom screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Commodore 128 (CPU 8502)

In order to compile the example, type this command on the command line:

Linux

ugbc.c128 -O prg -o screens_cls_01.prg screens_cls_01.bas

Windows

ugbc.c128.exe -O prg -o screens_cls_01.prg screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Commodore 64, Commodore Executive 64

In order to compile the example, type this command on the command line:

Linux

ugbc.c64 -O prg -o screens_cls_01.prg screens_cls_01.bas

Windows

ugbc.c64.exe -O prg -o screens_cls_01.prg screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Dragon 32

In order to compile the example, type this command on the command line:

Linux

ugbc.d32 -O bin -o screens_cls_01.bin screens_cls_01.bas

Windows

ugbc.d32.exe -O bin -o screens_cls_01.bin screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Dragon 64

In order to compile the example, type this command on the command line:

Linux

ugbc.d64 -O bin -o screens_cls_01.bin screens_cls_01.bas

Windows

ugbc.d64.exe -O bin -o screens_cls_01.bin screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Olivetti Prodest PC128, Thomson MO6

In order to compile the example, type this command on the command line:

Linux

ugbc.pc128op -O k7 -o screens_cls_01.k7 screens_cls_01.bas

Windows

ugbc.pc128op.exe -O k7 -o screens_cls_01.k7 screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

SEGA SC-3000

In order to compile the example, type this command on the command line:

Linux

ugbc.sc3000 -O rom -o screens_cls_01.rom screens_cls_01.bas

Windows

ugbc.sc3000.exe -O rom -o screens_cls_01.rom screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

SEGA SG-1000

In order to compile the example, type this command on the command line:

Linux

ugbc.sg1000 -O rom -o screens_cls_01.rom screens_cls_01.bas

Windows

ugbc.sg1000.exe -O rom -o screens_cls_01.rom screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

TRS-80 Color Computer, TRS-80 Color Computer 2

In order to compile the example, type this command on the command line:

Linux

ugbc.coco -O bin -o screens_cls_01.bin screens_cls_01.bas

Windows

ugbc.coco.exe -O bin -o screens_cls_01.bin screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

TRS-80 Color Computer 3

In order to compile the example, type this command on the command line:

Linux

ugbc.coco3 -O bin -o screens_cls_01.bin screens_cls_01.bas

Windows

ugbc.coco3.exe -O bin -o screens_cls_01.bin screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Thomson TO8

In order to compile the example, type this command on the command line:

Linux

ugbc.to8 -O k7 -o screens_cls_01.k7 screens_cls_01.bas

Windows

ugbc.to8.exe -O k7 -o screens_cls_01.k7 screens_cls_01.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Any problem?

If you have found a problem trying to run this example, if you think there is a bug or, more simply, you would like it to be improved, open an issue for this example on GitHub.
Thank you!

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