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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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