Table of Contents

ugBASIC User Manual

MULTI TASKING FOR DUMMIES (7)

PURPOSE

This example will show how to use multitasking to make a simple animation of various bats and boys on the screen.

SOURCE CODE

 
 BITMAP ENABLE (160,200,16)
 ' avoid to insert into the executable
 ' all the code for screen modes #0, #1 and #2
 DEFINE SCREEN MODE UNIQUE
 
 ' do not use double buffering!
 'DEFINE DOUBLE BUFFER OFF
 
 ' We do not use strings: so we ask to define at 
 ' most 10 independent strings with a buffer size
 ' of 128 bytes.
 'DEFINE STRING COUNT 10
 'DEFINE STRING SPACE 128
 
 
 CLS BLACK
 ken := LOAD IMAGES("examples/sf/ken9648.png")  FRAME SIZE (24,48) EXACT 
 blanka := LOAD IMAGES("examples/sf/blanka14448.png" ) FRAME SIZE (40,48) EXACT
 ' ken := LOAD IMAGES("sf/Ken_01b.png")  FRAME SIZE (48,96)
 ' blanka := LOAD IMAGES("sf/Blanka_01b.png" ) FRAME SIZE (72,96)
 
 CONST POSITIVE batCount = 2
 
 DIM x(batCount)
 DIM y(batCount)
 DIM f(batCount)
 
 PARALLEL PROCEDURE moveKen
     SHARED ken, x, y, f
     kenSleeper = 0
     DO
         INC kenSleeper
         IF kenSleeper > 100 THEN
             PUT IMAGE ken FRAME [f] AT [x],[y]
             [f] = [f] + 1
             IF [f] == FRAMES(ken) THEN
                 [f] = 0
             ENDIF
             kenSleeper = 0
         ENDIF
         YIELD
     LOOP
 END PROC
 
 PARALLEL PROCEDURE moveBlanka
     SHARED blanka, x, y, f
     blankaSleeper = 0
     DO
         INC blankaSleeper
         IF blankaSleeper > 50 THEN
             PUT IMAGE blanka FRAME [f] AT [x],[y]
             [f] = [f] + 1
             IF [f] == FRAMES(blanka) THEN
                 [f] = 0
             ENDIF
             blankaSleeper = 0
         ENDIF
         YIELD
     LOOP
 END PROC
 
 x(0) = 0
 y(0) = SCREEN HEIGHT - 48
 f(0) = 0
 SPAWN moveKen
 x(1) = SCREEN WIDTH -40
 y(1) = SCREEN HEIGHT - 50
 f(1) = 1
 SPAWN moveBlanka
 'FOR i=0 TO (batCount-1)
 '    x(i) = i * (SCREEN WIDTH -72)
 '    y(i) = SCREEN HEIGHT - 96
 '    f(i) = i MOD (batCount-1)
 '    IF ( i AND 1 ) == 0 THEN
 '        SPAWN moveKen
 '    ELSE
 '        SPAWN moveBlanka
 '    ENDIF
 'NEXT
 
 DO: RUN PARALLEL: LOOP

SOURCE FILE

HOW TO COMPILE AND RUN

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.

ATARI 400/800 family

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

ATARI 600XL/800XL/1200XL/XG(SE) family

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

Commodore 64

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

Commodore PLUS/4

Using YAPE

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 sf.bas -o example.prg
 yape example.prg
 
 # Windows 
 ugbc.plus4.exe sf.bas -o example.prg
 yape example.prg
Using VICE

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

Dragon 32

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

Dragon 64

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

PC128 Olivetti Prodest

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

Thomson MO5

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

Commodore VIC-20

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

ZX Spectrum

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

MSX

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:

openMSX
 # Linux 
 ugbc.msx1 sf.bas -o example.rom
 openmsx -cart example.rom
 
 # Windows 
 ugbc.msx1.exe sf.bas -o example.rom
 openmsx -cart example.rom
blueMSX
 # Linux 
 ugbc.msx1 sf.bas -o example.rom
 bluemsx example.rom
 
 # Windows 
 ugbc.msx1.exe sf.bas -o example.rom
 bluemsx example.rom

ColecoVision

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:

openMSX
 # Linux 
 ugbc.coleco sf.bas -o example.rom
 openmsx -machine \"COL - ColecoVision\" -cart example.rom
 
 # Windows 
 ugbc.coleco.exe sf.bas -o example.rom
 bluemsx -machine \"COL - ColecoVision\" example.rom
blueMSX
 # Linux 
 ugbc.coleco sf.bas -o example.rom
 bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
 
 # Windows 
 ugbc.coleco.exe sf.bas -o example.rom
 bluemsx  /machine \"COL - ColecoVision\" /rom1 example.rom

SEGA SC-3000

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

SEGA SG-1000

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

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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