' Tipo di dato predefinito: privo di segno
 OPTION TYPE UNSIGNED
 
 ' Tipo di dato predefinito: BYTE (8 bit)
 OPTION DEFAULT TYPE BYTE
 
 ' Indirizzo di partenza da dove disegnare il prossimo fotogramma.
 DIM actualAddress AS WORD = &H3008 
 
 ' Indirizzo usato per disegnare il fotogramma
 DIM startingAddress AS WORD = &H3000
 
 ' Flag: 
 '   0 -> muovi verso destra; 
 '   1 -> muovi verso sinistra
 DIM increment AS BYTE = 0
 
 ' Abilita l'LCD
 
 SCREEN ON
 
 ' Questa procedura si occupa di disegnare il fotogramma
 ' con la scritta "HI".
 PROCEDURE drawHi
 
 	' L'indirizzo condiviso dal programma principale.
 	
 	SHARED startingAddress
 
 	' I valori da usare per riempire le locazioni
 	' di memoria (uso delle variabili per garantire
 	' che siano prive di segno. In realtà potrei
 	' usare delle costanti che non occupano spazio,
 	' ma al momento l'ML non è completo).
 	
 	DIM filled AS BYTE = &HFF
 	DIM middle AS BYTE = &H18
 	DIM none AS BYTE = &H00
 	
 	' Disegno l'H (5x8 pixel)
 
 	POKE startingAddress, filled: INC startingAddress
 	POKE startingAddress, filled: INC startingAddress
 	POKE startingAddress, middle: INC startingAddress
 	POKE startingAddress, filled: INC startingAddress
 	POKE startingAddress, filled: INC startingAddress
 
 	' Ora disegno la I (3x8 pixel)
 
 	POKE startingAddress, none: INC startingAddress
 	POKE startingAddress, filled: INC startingAddress
 	POKE startingAddress, filled
 
 END PROC
 
 ' Questa procedura cancella lo spazio dove prima si
 ' trovava l'HI (e intorno).
 PROCEDURE clearHi
 
 	' L'indirizzo condiviso dal programma principale.
 	
 	SHARED startingAddress
 
 	' I valori da usare per riempire le locazioni
 	' di memoria (uso delle variabili per garantire
 	' che siano prive di segno. In realtà potrei
 	' usare delle costanti che non occupano spazio,
 	' ma al momento l'ML non è completo).
 	
 	DIM index AS BYTE = &H00
 	DIM none AS BYTE = &H00
 
 	' Se sto cancellando oltre gli 8 colonne a destra,
 	' inizio a cancellare da 8 colonne a sinistra.
 	' Altrimenti inizio dalla colonna zero.
 	
 	IF startingAddress > 8 THEN
 		startingAddress = startingAddress - 8
 	ELSE
 		startingAddress = 0
 	ENDIF
 
 	' Faccio un loop per 16 colonne di larghezza.
 	
 	DO
 		' Cancello la colonna
 		POKE startingAddress, none: INC startingAddress
 		
 		' Conto le colonne: se ne ho cancellate 16, finisco.
 		
 		INC index
 		
 		EXIT IF index > 16
 	LOOP		
 	
 END PROC
 
 ' Loop infinito.
 
 DO
 
 	' Prima di tutto cancelliamo lo schermo dove si trova
 	' l'ultima scritta "HI" disegnata.
 	
 	startingAddress = actualAddress
 	clearHi[]
 
 	' Se mi devo spostare in avanti, incremento l'indirizzo
 	' della colonna da cui iniziare a disegnare "HI",
 	' fino a che non arrivo al limite a destra.
 	
 	IF increment = 0 THEN
 		INC actualAddress
 		IF actualAddress > &H300f THEN
 			increment = 1
 		ENDIF
 
 	' Altrimenti mi devo spostare indietro di una colonna,
 	' almeno fino a che non arrivo all'inizio dello schermo.
 
 	ELSE
 		DEC actualAddress
 		IF actualAddress < &H3008 THEN
 			increment = 0
 		ENDIF
 	ENDIF
 
 	' Ora posso disegnare "HI".
 	startingAddress = actualAddress
 	drawHi[]
 	
 	' Rallentiamo un po' sennò non si vede niente...
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 	WAIT 200 CYCLES
 		
 LOOP

• moving_demo.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 moving_demo.bas -o example.xex
 altirra example.xex
 
 # Windows 
 ugbc.atari.exe moving_demo.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 moving_demo.bas -o example.xex
 altirra example.xex
 
 # Windows 
 ugbc.atarixl.exe moving_demo.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 moving_demo.bas -o example.prg
 x64sc example.prg
 
 # Windows 
 ugbc.c64.exe moving_demo.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 moving_demo.bas -o example.prg
 x64sc -reu example.prg
 
 # Windows 
 ugbc.c64reu.exe moving_demo.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 moving_demo.bas -o example.prg
 yape example.prg
 
 # Windows 
 ugbc.plus4.exe moving_demo.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 moving_demo.bas -o example.prg
 xplus4 example.prg
 
 # Windows 
 ugbc.plus4.exe moving_demo.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 moving_demo.bas -o example.bin
 xroar -rompath (your rom path) example.bin
 
 # Windows 
 ugbc.d32.exe moving_demo.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 moving_demo.bas -o example.bin
 xroar -rompath (your rom path) example.bin
 
 # Windows 
 ugbc.d64.exe moving_demo.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 moving_demo.bas -o example.k7
 dcmoto
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
 
 # Windows 
 ugbc.pc128op.exe moving_demo.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 moving_demo.bas -o example.k7
 dcmoto
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
 
 # Windows 
 ugbc.pc128op.exe moving_demo.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 moving_demo.bas -o example.prg
 xvic --memory 24k example.prg
 
 # Windows 
 ugbc.vic20.exe moving_demo.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 moving_demo.bas -o example.tap
 Speccy example.tap
 
 # Windows 
 ugbc.zx.exe moving_demo.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 moving_demo.bas -o example.rom
 openmsx -cart example.rom
 
 # Windows 
 ugbc.msx1.exe moving_demo.bas -o example.rom
 openmsx -cart example.rom

 # Linux 
 ugbc.msx1 moving_demo.bas -o example.rom
 bluemsx example.rom
 
 # Windows 
 ugbc.msx1.exe moving_demo.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 moving_demo.bas -o example.rom
 openmsx -machine \"COL - ColecoVision\" -cart example.rom
 
 # Windows 
 ugbc.coleco.exe moving_demo.bas -o example.rom
 bluemsx -machine \"COL - ColecoVision\" example.rom

 # Linux 
 ugbc.coleco moving_demo.bas -o example.rom
 bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
 
 # Windows 
 ugbc.coleco.exe moving_demo.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 moving_demo.bas -o example.rom
 bluemsx /machine \"SEGA - SC-3000\" /rom1 example.rom
 
 # Windows 
 ugbc.sc3000.exe moving_demo.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 moving_demo.bas -o example.rom
 bluemsx /machine \"SEGA - SG-1000\" /rom1 example.rom
 
 # Windows 
 ugbc.sg1000.exe moving_demo.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!