BITMAP ENABLE(16)
 
 CLS
 
 level1 := LOAD TILEMAP("/usr/src/mine-rails/resources/level1.tmx")
 
 tileset := TILESET(level1)
 
 POSITIVE CONST startX = 1
 POSITIVE CONST startY = 1
 POSITIVE CONST tileWidth = TILE WIDTH( tileset )
 POSITIVE CONST tileHeight = TILE HEIGHT( tileset )
 POSITIVE CONST screenWidthInTiles = SCREEN WIDTH / tileWidth 
 POSITIVE CONST screenHeightInTiles = SCREEN HEIGHT / tileHeight
 POSITIVE CONST maxPageX = ( ( TILEMAP WIDTH( level1 ) - 1 ) / screenWidthInTiles ) + 1
 POSITIVE CONST maxPageY = ( ( TILEMAP HEIGHT( level1 ) - 1 ) / screenHeightInTiles ) + 1
 
 DIM actualPageX AS SIGNED BYTE
 DIM actualPageY AS SIGNED BYTE
 DIM previousPageX AS SIGNED BYTE = -1
 DIM previousPageY AS SIGNED BYTE = -1
 
 GLOBAL level1
 GLOBAL actualPageX, actualPageY
 GLOBAL previousPageX, previousPageY
 
 PROCEDURE drawMap
 
 	IF ( previousPageX <> actualPageX ) OR ( previousPageY <> actualPageY ) THEN
 		PUT TILEMAP level1 FROM actualPageX * screenWidthInTiles, actualPageY * screenHeightInTiles
 		previousPageX = actualPageX
 		previousPageY = actualPageY
 	ENDIF
 
 END PROC
 
 PROCEDURE readMovement
 
 	right = JRIGHT(0) OR KEY PRESSED( KEY S )
 	left = JLEFT(0) OR KEY PRESSED( KEY A )
 	up = JUP(0) OR KEY PRESSED( KEY W )
 	down = JDOWN(0) OR KEY PRESSED( KEY Z )
 
 	IF right AND ( (actualPageX+1) < maxPageX ) THEN
 		INC actualPageX
 	ELSE IF left AND ( (actualPageX-1) >= 0 ) THEN
 		DEC actualPageX
 	ELSE IF down AND  ( (actualPageY+1) < maxPageY )  THEN
 		INC actualPageY
 	ELSE IF up AND ( (actualPageY-1) >= 0 ) THEN
 		DEC actualPageY
 	ENDIF
 
 END PROC
 
 DO
 
 	drawMap[]
 
 	readMovement[]
 	
 LOOP
 
 
 

• main_008.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 main_008.bas -o example.xex
 altirra example.xex
 
 # Windows 
 ugbc.atari.exe main_008.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 main_008.bas -o example.xex
 altirra example.xex
 
 # Windows 
 ugbc.atarixl.exe main_008.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 main_008.bas -o example.prg
 x64sc example.prg
 
 # Windows 
 ugbc.c64.exe main_008.bas -o example.prg
 x64sc 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 main_008.bas -o example.prg
 yape example.prg
 
 # Windows 
 ugbc.plus4.exe main_008.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 main_008.bas -o example.prg
 xplus4 example.prg
 
 # Windows 
 ugbc.plus4.exe main_008.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 main_008.bas -o example.bin
 xroar -rompath (your rom path) example.bin
 
 # Windows 
 ugbc.d32.exe main_008.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 main_008.bas -o example.bin
 xroar -rompath (your rom path) example.bin
 
 # Windows 
 ugbc.d64.exe main_008.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 main_008.bas -o example.k7
 dcmoto
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
 
 # Windows 
 ugbc.pc128op.exe main_008.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 main_008.bas -o example.k7
 dcmoto
 (choose BASIC 128)
 CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
 
 # Windows 
 ugbc.pc128op.exe main_008.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 main_008.bas -o example.prg
 xvic --memory 24k example.prg
 
 # Windows 
 ugbc.vic20.exe main_008.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 main_008.bas -o example.tap
 Speccy example.tap
 
 # Windows 
 ugbc.zx.exe main_008.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 main_008.bas -o example.rom
 openmsx -cart example.rom
 
 # Windows 
 ugbc.msx1.exe main_008.bas -o example.rom
 openmsx -cart example.rom

 # Linux 
 ugbc.msx1 main_008.bas -o example.rom
 bluemsx example.rom
 
 # Windows 
 ugbc.msx1.exe main_008.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 main_008.bas -o example.rom
 openmsx -machine \"COL - ColecoVision\" -cart example.rom
 
 # Windows 
 ugbc.coleco.exe main_008.bas -o example.rom
 bluemsx -machine \"COL - ColecoVision\" example.rom

 # Linux 
 ugbc.coleco main_008.bas -o example.rom
 bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
 
 # Windows 
 ugbc.coleco.exe main_008.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 main_008.bas -o example.rom
 bluemsx /machine \"SEGA - SC-3000\" /rom1 example.rom
 
 # Windows 
 ugbc.sc3000.exe main_008.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 main_008.bas -o example.rom
 bluemsx /machine \"SEGA - SG-1000\" /rom1 example.rom
 
 # Windows 
 ugbc.sg1000.exe main_008.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!