ugBASIC User Manual

This small example will use the DO…LOOP keywords to implement an endless loop, and the command EXIT n to break n loops. The outer loop will change, at each half of second, the border's color from black to yellow. The inner loop will change the color of border to red and green. Instead of continuing with the inner loop, this one (and the outer) will be exited by using the EXIT 2 command. The border color is changed using the COLOR BORDER instruction, using the predefined constants YELLOW, BLACK, RED, GREEN. To wait for a specific amount of time the WAIT command will be used, with the MS (milliseconds) unit of time.

 
    CLS
 
    DO
       COLOR BORDER YELLOW
       HOME: PRINT "YELLOW"
       WAIT 500 MS
       COLOR BORDER BLACK
       HOME: PRINT "BLACK "
       WAIT 500 MS
       DO
          COLOR BORDER RED
          HOME: PRINT "RED   "
          WAIT 1000 MS
          COLOR BORDER GREEN
          HOME: PRINT "GREEN "
          WAIT 1000 MS
          DO
             COLOR BORDER RED
             HOME: PRINT "RED   "
             WAIT 1000 MS
             EXIT 2 : REM EXIT 2 = skip 1 more loop, because "EXIT" == "EXIT 1"!
             REM The border will never be green,
             REM and the secondo loop will be skiped
             COLOR BORDER GREEN
             HOME: PRINT "GREEN "
             WAIT 1000 MS
          LOOP
       LOOP
    LOOP
 
 

• control_loops_03.bas

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 compile the example with just one click.

In order to compile and run the example, you need to have the Altirra emulator, and in particular that the altirra executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.atari control_loops_03.bas -o example.xex
 altirra example.xex
 
 # Windows 
 ugbc.atari.exe control_loops_03.bas -o example.xex
 altirra example.xex

In order to compile and run the example, you need to have the Altirra emulator, and in particular that the altirra executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.atarixl control_loops_03.bas -o example.xex
 altirra example.xex
 
 # Windows 
 ugbc.atarixl.exe control_loops_03.bas -o example.xex
 altirra example.xex

In order to compile and run the example, you need to have the VICE emulator, and in particular that the x64sc executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.c64 control_loops_03.bas -o example.prg
 x64sc example.prg
 
 # Windows 
 ugbc.c64.exe control_loops_03.bas -o example.prg
 x64sc example.prg

In order to compile and run the example, you need to have the VICE emulator, and in particular that the x64sc executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.c64reu control_loops_03.bas -o example.prg
 x64sc -reu example.prg
 
 # Windows 
 ugbc.c64reu.exe control_loops_03.bas -o example.prg
 x64sc -reu example.prg

In order to run the example, you need to have the YAPE emulator. In particular that the yape executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.plus4 control_loops_03.bas -o example.prg
 yape example.prg
 
 # Windows 
 ugbc.plus4.exe control_loops_03.bas -o example.prg
 yape example.prg

In order to run the example, you need to have the VICE emulator. In particular that the xplus4 executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.plus4 control_loops_03.bas -o example.prg
 xplus4 example.prg
 
 # Windows 
 ugbc.plus4.exe control_loops_03.bas -o example.prg
 xplus4 example.prg

In order to compile and run the example, you need to have the XROAR emulator, and in particular that the xroar executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.d32 control_loops_03.bas -o example.bin
 xroar -rompath (your rom path) example.bin
 
 # Windows 
 ugbc.d32.exe control_loops_03.bas -o example.bin
 xroar.exe -rompath (your rom path) example.bin

In order to compile and run the example, you need to have the XROAR emulator, and in particular that the xroar executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.d64 control_loops_03.bas -o example.bin
 xroar -rompath (your rom path) example.bin
 
 # Windows 
 ugbc.d64.exe control_loops_03.bas -o example.bin
 xroar.exe -rompath (your rom path) example.bin

In order to compile and run the example, you need to have the DCMOTO emulator, and in particular that the dcmoto executable is accessible.

Then, type this command on the command line and on the emulator:

 # Linux 
 ugbc.pc128op control_loops_03.bas -o example.k7
 dcmoto
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
 
 # Windows 
 ugbc.pc128op.exe control_loops_03.bas -o example.k7
 dcmoto
 (choose example.k7)
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC

In order to compile and run the example, you need to have the DCMOTO emulator, and in particular that the dcmoto executable is accessible.

Then, type this command on the command line and on the emulator:

 # Linux 
 ugbc.pc128op control_loops_03.bas -o example.k7
 dcmoto
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
 
 # Windows 
 ugbc.pc128op.exe control_loops_03.bas -o example.k7
 dcmoto
 (choose example.k7)
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC

In order to compile and run the example, you need to have the VICE emulator, and in particular that the xvic executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.vic20 control_loops_03.bas -o example.prg
 xvic --memory 24k example.prg
 
 # Windows 
 ugbc.vic20.exe control_loops_03.bas -o example.prg
 xvic --memory 24k example.prg

In order to compile and run the example, you need to have the Speccy emulator, and in particular that the speccy executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.zx control_loops_03.bas -o example.tap
 Speccy example.tap
 
 # Windows 
 ugbc.zx.exe control_loops_03.bas -o example.tap
 Speccy example.tap

In order to compile and run the example, you need to have the openMsx or the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.msx1 control_loops_03.bas -o example.rom
 openmsx -cart example.rom
 
 # Windows 
 ugbc.msx1.exe control_loops_03.bas -o example.rom
 openmsx -cart example.rom

 # Linux 
 ugbc.msx1 control_loops_03.bas -o example.rom
 bluemsx example.rom
 
 # Windows 
 ugbc.msx1.exe control_loops_03.bas -o example.rom
 bluemsx example.rom

In order to compile and run the example, you need to have the openMsx or the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.coleco control_loops_03.bas -o example.rom
 openmsx -machine \"COL - ColecoVision\" -cart example.rom
 
 # Windows 
 ugbc.coleco.exe control_loops_03.bas -o example.rom
 bluemsx -machine \"COL - ColecoVision\" example.rom

 # Linux 
 ugbc.coleco control_loops_03.bas -o example.rom
 bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
 
 # Windows 
 ugbc.coleco.exe control_loops_03.bas -o example.rom
 bluemsx  /machine \"COL - ColecoVision\" /rom1 example.rom

In order to compile and run the example, you need to have the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.sc3000 control_loops_03.bas -o example.rom
 bluemsx /machine \"SEGA - SC-3000\" /rom1 example.rom
 
 # Windows 
 ugbc.sc3000.exe control_loops_03.bas -o example.rom
 bluemsx  /machine \"SEGA - SC-3000\" /rom1 example.rom

In order to compile and run the example, you need to have the BlueMSX emulator, and in particular that its executable is accessible.

Then, type this command on the command line:

 # Linux 
 ugbc.sg1000 control_loops_03.bas -o example.rom
 bluemsx /machine \"SEGA - SG-1000\" /rom1 example.rom
 
 # Windows 
 ugbc.sg1000.exe control_loops_03.bas -o example.rom
 bluemsx  /machine \"SEGA - SG-1000\" /rom1 example.rom

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!