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It is a convenience directive for defining least significant byte first two byte words, as the Z80 uses them. Multiple expressions, separated by commas, may be. ZASM is a compiler/assembler and monitor (including disassembler and debugger) for the Z80 CPU. It runs under Linux (probably also. Uses. The easiest way to put data directly into your program. Note that since the z80 processor is little-endian, loading into a bit register from.

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At the start, the assemblsur address is set to 0. It will seek in the output file and start overwriting previous output. It reserves num bytes of space and initializes them to val.

In the following example, the output contains 4 bytes: Parts of the code can be omitted using these conditional statements. After this definition, it is possible to use the macro, like this: This can be used to put some comments at the end.

The argument is given in the same way as for include. Normally, the first directive in a program is org, to set the starting address.

Assembler directives

Everything after this directive is ignored. The first non-whitespace character after the include directive is considered the starting quote.


Incbin stands for “include binary”. Almost any name is possible without escape characters, because of the quote rules. This sets the assembler’s idea of the current address. The filename is then read, until the ending quote, which is the same as the starting quote. It takes one argument, which must evaluate to a value in the first assekbleur it may not use labels which are defined later.

At the end of the program, it is allowed to use the “end” directive. All definitions should be separated by commas. If val is omitted, it defaults to 0. At the start of each page, the code can set the starting address to the mapping address.

Otherwise it is a80 touched, which means that if you use these directives, a successfull assembler execution does not imply that all the code is correct. It allows any binary data to be included verbatim into the output.

assembleur z80 pour cpc &copy _prototype_ (19??)

It is a convenience directive for defining least significant byte first two byte words, as the Z80 uses them. It allows the included binary to be “patched”. There is no need to do this. Strings of bytes should be between double quotes.

Org only changes the assembler’s idea of “where” it is. Note that no code is generated by this directive, so if padding bytes are required, they must be inserted using defs. People have requested to be able to overwrite the generated output. Assembleuf the argument of seek is greater than the current output size, the file is extended with zeros.


This is mostly useful in combination with incbin. It takes one aseembleur two arguments, num and val. This is what seek is for.

Using this directive more than once can be useful to create code which is to be executed at the same address, for example when the memory assembeur mapped. As in C but without thethis includes an other source file.

With these directives it is possible to define new commands, which will output defined code. It allows definition of one or more literal bytes, as well as strings of bytes. Multiple expressions, separated by commas, may be specified. Code which is not assembled is checked for a correct command.

The previously defined pages are not overwritten.