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Home  Assembly Programming Journal Issue 3 (1998-2001)
Issue 3 (1998-2001)
___ .___ __) (__ _____ ______ ```
._____| ____ ___/__.) /.) _ (_. \
| | _ |_ | / | |CE ,
.=|_____|___)___|(_______|______| |===============[ Introduction ]===.
'================================| :=================================='
: . by mammon_
The first thing that you will notice about this issue --well, that it is late--
will probably be the section headers designed by iCE. I had to add a top/upper
left border to them [the horizontal and slanted lines] in order to make them
standout when scrolling though a 100K file such as this one, but other than
they are all his: comments, etc welcome.
I don't have much to say about this issue: I went overboard with the NASM stuff
this month as I have been doing a lot of 'research' work in that area recently;
my articles have been supplemented with Tamas Kaproncai's Win32 NASM pointers.
Iczelion and XBios2 have both produced --as usual-- 2 quality articles this
month, Iczelion's based on his win32 asm tutorial 'the MASM way', and XBios2
once again continuing to replace C with assembler.
+Spath. has produced an excellent article on SPARC assembly language; I was
hoping to debut the 'other CPU' scene with a MIPS article I had planned but it
looks like +Spath has beat me to it.
On a similar note, I mentioned on the Message Board wanting to start a Virtual
Machines column. Cynical Pinnacle has started the column off this month with an
article on programming the Java VM in its native 'assembly language'; in
subsequent issues I and perhaps others will be adding articles here as well.
A final note, I have not come up with a challenge for the next issue; anyone
with good ideas is welcome to post one to the Message Board or to the APJ
email address.
Enjoy the mag!
_m
| X-Windows in Assembly Language: Part II
| X-Windows in Assembly Language: Part II
OK, let's face it: you've seen the tedium of XLib, one has to use widgets in
order to get any programming done in XWindows. 'But this is assembly langauge',
the masochist might point out. 'Aren't widgets a little Visual-Basicy?'
Not in the slightest. A widget is simply a C++ class exported for use --much
like the windows API functions, only a little more object oriented...maybe a
good comparison would be MFC or VCL. Xt, or 'X toolkit Intrinsics'...
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| C string functions: introduction, _strlen
| C string functions: introduction, _strlen
String handling in assembly is - anyway - a difficult subject. There are few
string-oriented x86 opcodes, and most of them are slow. There is not a standard
library providing even basic functions. There is no string specific syntax in
assembly, like C's printf('hello world') or, even worse, BASIC's a$=b$+'hello'.
In a few words, if easy string-related programming is your goal, maybe you
should consider PERL, or another text-manipulation language.
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| C string functions: _strcpy
| C string functions: _strcpy
In this article we will examine two 'modern' _strcpy functions, found in
MSVCRT.DLL and Borland C++ Builder library. Those functions are (supposed to be)
optimized for Pentium processors. If you're not familiar with optimization for
Pentium processors, I suggest you read the document on Pentium optimization by
Agner Fog (http://announce.com/agner/assem).
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| An introduction to SPARC assembly
| An introduction to SPARC assembly
The goal of this article is to introduce SPARC v8 architecture and SPARC assembly ; I hope it can also constitute a good introduction to RISC philosophy.
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| NumFactors
| NumFactors
;Summary: Routine to determine the number of factors for a 16-bit value
;Compatibility: All DOS versions/8088+ instructions
;Notes: 22 BYTES Input: AX = Value to check for number of factors
; * If CX is 2, check value in AX is prime.
mov bx,1 ;Test=1 (Test is the testing value of each theoretical
;factor of AX, from 1-AX).
xor cx,cx ;Count=0 (Count is running total with # of factors for AX).
ChkFctr:
xor dx,dx
...
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| Extending NASM
| Extending NASM
Programmers transitioning to NASM from a commercial assembler such as MASM or
TASM immediately notice the lack of any high-level language structures -- the
assembly syntax accepted by NASM is only slightly more sophisticated than what
you would find in a debugger. While this has its good side --smaller code size,
nothing hidden from the programmer-- it does make coding a bit more tedious.
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| An Intro to the Java Virtual Machine
| An Intro to the Java Virtual Machine
For awhile C/C++ reigned supreme and nothing challenged it but then along
comes Java, creating a splash, and causing outright corporate warfare to claim
right of ownership. Strangely enough the result of this war has not been dead
bodies but buckets and buckets of API's all given away for free. Just stop by
and take a look at Java's Official Website (http://java.sun.com) and what do
you find a good development kit with compiler, symbolic debugger, disassembler,
complete too...
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