ASSEMBLEUR Z80 PDF

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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The argument is given in the same way as for include. Strings of bytes should be between double quotes. Org only changes the assembler’s idea of “where” it is.

This sets the assembler’s idea of the current address. If asssembleur is omitted, it defaults to 0. Multiple expressions, separated by commas, may be specified. The filename is then read, until the ending quote, which is the same as the starting quote. 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 is mapped.

At the start, the current address is set to 0. It takes one or two arguments, num and asssembleur. This is mostly useful in combination with incbin. There is no need to do this. After this definition, it is possible to use the macro, like this: All definitions should be separated by commas. It allows definition of one or more literal bytes, as well as strings of bytes. Code which is not assembled is checked for a correct command.

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Normally, the first directive in a program is org, to set the starting address. Incbin stands for “include binary”. If the argument of seek is greater than the current output size, the file is extended asse,bleur zeros. Almost any assembkeur is possible without escape characters, because of the quote rules.

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It is a convenience directive for defining least significant byte first two byte words, as the Z80 uses them. It will seek assemlbeur the output file and start overwriting previous output. This can be used to put some comments at the end. It allows any binary data to be included verbatim into the output.

The previously defined pages are not overwritten.

Parts of the code can be assejbleur using these conditional statements. It reserves num bytes of space and initializes them to val. As in C but without thethis includes an other source file. Everything after this directive is ignored.

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It takes one argument, which must evaluate to a value in the first pass it may not use labels which are defined later. At the end of the program, it is allowed to use the “end” directive. With these directives it is possible to define new commands, which will output defined code. It allows the included binary to be “patched”. In the following example, the output contains 4 bytes: This is what seek is for.

Assembler directives

Otherwise it is not touched, which means that if you use these directives, a successfull assembler execution does not imply that all the code is correct. At the start of each page, the code can set the starting address to the mapping address.

People have requested to be able to overwrite the asssembleur output. Note that no code is generated by this directive, so if padding bytes are required, they must be inserted using defs. The first non-whitespace character after the include directive is considered the starting quote.