RE: Searching for blind programmer to start a school for blind programmers
- From: "Ken Perry" <whistler@xxxxxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Sat, 9 Apr 2011 18:59:40 -0400
Oh really? I found it very useful knowing how to minimize code and data
sections by hand. It explains what compilers and linkers have to go through
and ways to get around problems that exist. It even is nice knowing how exe
files are laid out. I agree that it's a nasty bit of study to get to that
point but I totally disagree that the knowledge is not useful. In fact if
you ever want to get involved with the GNU compiler group believe me it's
useful.
Ken
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Christopher
Coale
Sent: Saturday, April 09, 2011 6:52 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Searching for blind programmer to start a school for blind
programmers
My knowledge of how the processor works (by means of knowing assembly
and OS development) is useful. Knowing how to write a program using only
byte code is not (and I couldn't do it without many free hours and lots
of reference manuals, and even then it would be a difficult task). Not
to belittle your knowledge, but I'm just saying that being able to write
a program using a hex-editor (and if you can, more power to you) is not
very helpful in understanding how computers work; learning assembly and
learning operating system design is where it is important, I would say.
On 4/9/2011 3:45 PM, Ken Perry wrote:
> Yes and us true geeks used to dream hex in our sleep. I think there are
> still some of us left and I am no longer one, I know of all the
> possibilities and I can still code in ASM for burning chips but I no
longer
> dream in op codes and registers, memory locations and IRQ's. All I was
> saying is learning of the existence and how it works is invaluable to a
> programmer even today. Are you telling me your knowledge of the subject
is
> not useful?
>
> Ken
>
> -----Original Message-----
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Christopher
> Coale
> Sent: Saturday, April 09, 2011 3:30 PM
> To: programmingblind@xxxxxxxxxxxxx
> Subject: Re: Searching for blind programmer to start a school for blind
> programmers
>
> I didn't say it was impossible (after all, how else would a compiler
> work?) I said that it was asinine and impractical. I say this because
> the x86 instruction set is amazingly complex. Sure someone could use a
> debugger to look around at machine code, that's not hard at all (in
> fact, I do it a lot with vc++ to debug things and get performance
> boosts). But, writing a binary file from scratch? I see it being
> possible, but you would need to know the encoding of every instruction
> you use. For example, "int imm8" is apparently 0xCD + the immediate
> byte, so to do int 80h, you'd have 0xCD80. That is fairly simple, but
> the "mov" instructions where you can have memory, immediate, and
> register operands are difficult, and then for each memory, immediate,
> and register operand you have an 8-bit, 16-bit, 32-bit, and for x64,
> 64-bit versions. It's no small feat to write a binary by hand.
>
>> Laugh yes I have read them and there was a time I could write some very
> good
>> stuff with nothing but a debugger. Just because it's nasty don't mean
> it's
>> impossible. I was not even in the same class of some of the guys I used
> to
>> hang out with. I knew one that won a programming contest who wrote a
>> program to display a naked woman with nothing more than Assembler and a
> text
>> editor. As for machine language you can write it on your own if you know
>> enough. Unfortunately time has dulled my memory of useless interrupts
>> because we have so much easier ways to do things now. I think I could
>> probably get a command line app to run with nothing but a hex editor but
>> calling the GUI might be beyond me because you would have to do some
> serious
>> digging to get that to work and sometimes the information is just not
>> available anymore.
>>
>> Ken
>>
>>
>> Ken
>>
>> -----Original Message-----
>> From: programmingblind-bounce@xxxxxxxxxxxxx
>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Christopher
>> Coale
>> Sent: Saturday, April 09, 2011 2:23 AM
>> To: programmingblind@xxxxxxxxxxxxx
>> Subject: Re: Searching for blind programmer to start a school for blind
>> programmers
>>
>> What? Have you ever read the x86 information sheets? Teaching someone
>> assembly is a good way to teach them how a computer works -- having them
>> write programs in pure byte code (especially for x86) is both asinine
>> and impractical. Maybe not so much for an extremely extremely simple
>> virtual machine or basic processor, but complex instruction sets like
>> x86 are flat-out beyond writing op-codes by hand. If you don't believe
>> me, just take a poke at the NASM source code. ;)
>>
>> On 4/8/2011 6:47 PM, Ken Perry wrote:
>>> I am not quite as old as you but I come from the same time zone. I had
> to
>>> learn assembler to hack games on the Vic 20 and the commodore 64 and the
>> TI
>>> but more than that when I joined the Air Force and took on Electronics
>>> Assembler made my life easier. Then later in life after I lost my site
I
>>> took software engineering and had to burn chips and while we could have
>>> wrote stuff in C it was much easier to control the registers and stuff
>> with
>>> ASM. If we used C we allot of the time had to use special assembler
>>> keywords to get things to work quite right. If you look on the Fruit
>> Basket
>>> page I was also insane enough to write the fruit basket in Assembler for
>>> windows xp and it runs in vista. I am not sure if that runs in Windows
7
>>> but I should revisit it and make sure it does. Lost knowledge is not a
>> good
>>> thing. Assembler may not be a way I would write a project now days but
> if
>>> you want to teach someone how your computers work there is only one
thing
>>> better. The one thing better is straight opt codes using a debugger and
>>> watching what is going on. Well you could also write straight binary
>> files
>>> like a good Fortran coder but who does that any more. That what I
should
>> do
>>> is create the fruit basket with nothing but a hex editor.
>>>
>>> Ken
>>>
>>>
>>> -----Original Message-----
>>> From: programmingblind-bounce@xxxxxxxxxxxxx
>>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Bill Cox
>>> Sent: Friday, April 08, 2011 11:40 AM
>>> To: programmingblind@xxxxxxxxxxxxx
>>> Subject: Re: Searching for blind programmer to start a school for blind
>>> programmers
>>>
>>> On Fri, Apr 8, 2011 at 11:16 AM, Littlefield, Tyler<tyler@xxxxxxxxxxxxx>
>>> wrote:
>>>>> Assember? Really? You must be almost as old
>>>>> as me! I can't even find people who care about speed or memory usage
>>>>> anymore.
>>>> I love assembler. It's a great way to teach people what's going on
under
>>> the
>>>> hood and make them think about what they do. Every time I see someone
>>>> reserve a 100k buffer just because, I cringe. :)
>>> We must be from the same generation. I'm 47, and learned to program
>>> in machine code on an 8080 based Intel board with a hex keypad and
>>> some LEDs. It was a couple of years before I found out that people
>>> programmed using assemblers, rather than entering hex by hand.
>>>
>>> I worry that the new generation's early experience with computers is
>>> amazing games and technology so complex they could never realistically
>>> hope to understand it. What's the natural path now days for kids to
>>> go from playing computer games to writing them? On the old Apple IIs,
>>> you just typed list instead of run, and there was all the code.
>>>
>>> Bill
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