OTHER CONTRIBUTIONS: ASSEMBLY FOR BEGINNERS (MOS 6502)

This is a short program that shows how easy it is to learn assembly with ugBASIC. Since version 1.14.1, in fact, ugBASIC allows you to insert inline assembly code. Clearly, it is able to access to all the BASIC features. This program shows how a 16-bit (2 x 8-bit) addition works under the MOS 6502 processor.

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SOURCE CODE ()

	CLS

	DIM x AS INTEGER, y AS INTEGER, z AS INTEGER

	x = 150: y = 110: z = 0

	PRINT x;" + "; y; " = ";

	ON CPU6502 BEGIN ASM

		CLC
		
		LDA _x
		ADC _y
		STA _z
		
		LDA _x+1
		ADC _y+1
		STA _z+1
		
	END ASM

	PRINT z

How to compile and run the example

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 download and compile each single example with just one click.



Are instructions for your specific home computer / console missing? First of all, check if your computer is supported by clicking here. If so, since ugBASIC is a language which does not provide abstractions, it is possible that this example will not work on your target. If you think this is an issue, please click here.

Atari 1200XL, Atari 130XE, Atari 600XL, Atari 65XE, Atari 800XE, Atari 800XL, Atari XEGS

In order to compile the example, type this command on the command line:

Linux

ugbc.atarixl -O xex -o contrib_asm_mos6502.xex contrib_asm_mos6502.bas

Windows

ugbc.atarixl.exe -O xex -o contrib_asm_mos6502.xex contrib_asm_mos6502.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Atari 400, Atari 800

In order to compile the example, type this command on the command line:

Linux

ugbc.atari -O xex -o contrib_asm_mos6502.xex contrib_asm_mos6502.bas

Windows

ugbc.atari.exe -O xex -o contrib_asm_mos6502.xex contrib_asm_mos6502.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Commodore 128 (CPU 8502)

In order to compile the example, type this command on the command line:

Linux

ugbc.c128 -O prg -o contrib_asm_mos6502.prg contrib_asm_mos6502.bas

Windows

ugbc.c128.exe -O prg -o contrib_asm_mos6502.prg contrib_asm_mos6502.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Commodore 64, Commodore Executive 64

In order to compile the example, type this command on the command line:

Linux

ugbc.c64 -O prg -o contrib_asm_mos6502.prg contrib_asm_mos6502.bas

Windows

ugbc.c64.exe -O prg -o contrib_asm_mos6502.prg contrib_asm_mos6502.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

VIC-20

In order to compile the example, type this command on the command line:

Linux

ugbc.vic20 -O prg -o contrib_asm_mos6502.prg contrib_asm_mos6502.bas

Windows

ugbc.vic20.exe -O prg -o contrib_asm_mos6502.prg contrib_asm_mos6502.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

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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