JWasm v1.8
in [ASM]
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From: japheth on 22 Jun 2008 03:20 JWasm v1.8, a Masm v6 compatible free assembler, is out: http://www.japheth.de/JWasm.html major changes are - support for COFF format - listings supported - bugfixes for details see http://www.japheth.de/JWasm/history.txt
From: Frank Kotler on 23 Jun 2008 01:22 japheth wrote: > JWasm v1.8, a Masm v6 compatible free assembler, is out: > > http://www.japheth.de/JWasm.html > > major changes are > > - support for COFF format There you go!!! Save me the trouble of trying to get JWasm running on Linux... I have been informed that, in 32-bit code, for "push ds", Masm emits a 66h prefix (can this be true???). What's JWasm do with "push ds"? Prefix, or no prefix? Best, Frank
From: japheth on 23 Jun 2008 04:19 > Save me the trouble of trying to get JWasm running on Linux... It (JWASMD) runs fine in DosEmu. > I have > been informed that, in 32-bit code, for "push ds", Masm emits a 66h > prefix (can this be true???). What's JWasm do with "push ds"? Prefix, or > no prefix? There's no prefix emitted. Neither by Masm nor JWasm. Doing so would misalign the stack, as you almost certainly know. Who's telling such things?
From: Frank Kotler on 23 Jun 2008 05:34 japheth wrote: >> Save me the trouble of trying to get JWasm running on Linux... > > It (JWASMD) runs fine in DosEmu. Ah! I should try that! >> I have >> been informed that, in 32-bit code, for "push ds", Masm emits a 66h >> prefix (can this be true???). What's JWasm do with "push ds"? Prefix, or >> no prefix? > > There's no prefix emitted. Neither by Masm nor JWasm. Doing so would > misalign the stack, as you almost certainly know. Yes. Rare enough that we have any need to push a segreg in 32-bit code. I can't think of any reason to push 16 bits in 32-bit code, period. But the instruction does exist... > Who's telling such > things? Perhaps my (mis)informant should remain nameless. One of those !YAHOO! groups I keep an eye on. :) Thanks for the confirmation. Best, Frank
From: japheth on 25 Jun 2008 10:19 > I can't think of any reason to push 16 bits in 32-bit code, period. This might be a useful usage: push word ptr ds push ax pop eax to get a far16 pointer into eax in mixed-model code without destroying ax. However, both Masm and JWasm ignore the size override for DS and won't create a 66h suffix, it must be coded with db.
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