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> Compiler Internals > JECXZ in 16-bit code |
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CandyMan 14 Sep 2011, 16:36
attemp of the assembly of the code:
org 0xFFC00000 use16 jcxz $ error: invalid value |
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14 Sep 2011, 16:36 |
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LocoDelAssembly 14 Sep 2011, 17:53
This is happening with all jump instructions actually. In fasm 1.64 this code works.
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14 Sep 2011, 17:53 |
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Tomasz Grysztar 14 Sep 2011, 19:20
It is no longer assembled thanks to corrections made in 1.65.20 release. With "use16" jump defaults to 16-bit (which truncates target address to IP), and so it would jump to "0xFFC00000 and 0FFFFh", which is not the same as $, so fasm refuses to generate such code. You can jump to $=0xFFC00000 with 32-bit jump:
Code: jcxz dword $ And if you really wish to jump to "0xFFC00000 and 0FFFFh", then tell fasm that: Code: jcxz $ and 0FFFFh |
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14 Sep 2011, 19:20 |
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