Why the code below does exit gracefully without prints anything?
Sure, it is for my poor knowledge of the assembler, but in some details,
please...
program branch;
{$ASMMODE intel}
label next,stop,a,b,c;
var idx:byte;
begin
write('Index? ');
readln(idx);
asm
mov ax,idx;
shl ax,2;
mov bx,next;
a
Il 16/08/2018 17:40, Giuliano Colla ha scritto:
The first thing I notice is that you load BX, which is a 16 bit register
(the lower 16 bits of EBX), with the value of "next", and then Jump to
the content of EBX which is a 32 bit register, whose lower 16 bits have
been loaded but whose upper 16 b
Il 17/08/2018 18:04, Giuliano Colla ha scritto:
Enjoy programming!
Giuliano
Thank you!
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Il 17/08/2018 18:04, Giuliano Colla ha scritto:
I modified your code, to add a jump table (as it is in the example you
mention)
I came to that
program branch;
{$ASMMODE intel}
label tab,stop,a,b,c;
var idx:byte;
begin
write('Index? ');
readln(idx);
asm
xor eax,eax;
mov al,idx;
shl ax,2;
mov e
Il 20/08/2018 17:32, Giuliano Colla ha scritto:
On the Intel architecture you cannot perform pointer arithmetic as if a
pointer were just a number.
A pointer is composed of two parts: a "selector" and an "offset", which
must be handled separately.
Ah, I saw, 32 bit segmentation is quite compli
On Thu, 23 Aug 2018 09:32:58 +0200
Florian Klämpfl wrote:
> Am 21.08.2018 um 11:42 schrieb Marco Borsari via fpc-pascal:
> > Il 20/08/2018 17:32, Giuliano Colla ha scritto:
> >
> >> On the Intel architecture you cannot perform pointer arithmetic as if a
> >> p
On Sun, 26 Aug 2018 18:32:29 +0200
Florian Klämpfl wrote:
> Am 26.08.2018 um 11:43 schrieb Giuliano Colla:
> > Il 23/08/2018 11:34, Marco Borsari via fpc-pascal ha scritto:
> >
> >> It would be for the Wirth optimization in the access of an array,
> >> when
Hi all,
I have some problem with a file archiver which uses the Dos unit
under Windows, I suspect the flaw resides in GetFAttr function.
Looking in the source for Win RTL
procedure getfattr(var f;var attr : word);
var
l : longint;
s : RawByteString;
begin
doserror:=0;
s:=ToSingleByteFile
On Wed, 30 Jan 2019 15:14:12 +0100
Marco van de Voort wrote:
> Windows attributes can be > 8-bits, see e.g.
> https://docs.microsoft.com/nl-nl/windows/desktop/FileIO/file-attribute-constants.
But the Dos unit is in Windows for compatibility, if one need the
extended attributes there is the equi
In the online html documentation, in the Programmer's Guide, at 1.2.4,
it reads:
"If it is + (the default) then the compiler will only evaluate as many
terms as are necessary to determine the result of the complete expression."
Obviously it should be "If it is - (the default)"
Regards, Marco
--
Si
On Thu, 21 Nov 2019 01:16:16 -0500
Brian wrote:
> Hi all,
>
> Running Ubuntu 18 LTS, I have a console-mode number-cruncher which
> writes occasional output files. It works just fine if the output is
> directed to a drive which is permanently spun up, but can fail if the
> output is directed to a
Il 20/08/2020 17:10, Darius Blaszyk via fpc-pascal ha scritto:
To my delight I found out that FPC actually provides quite a few archive
handling libraries out of the box. Thanks to all that have contributed
to that! So far I found:
* tar
* tar.gz
* zip
Are there any other formats out there t
Il 09/04/2021 19:56, Guillermo via fpc-pascal ha scritto:
Hi pascaloids,
I'm doing DOS development for fun and, after installing the compiler
(was quite hard), I'm having problems handling interrupts.
I have this handler from SWAG, hope it would be helpful.
Marco
{
Unit for reading multiple ke
On Tue, 25 Oct 2022 08:30:19 +0200
Bo Berglund via fpc-pascal wrote:
> Is there some package or code available somewhere which can calculate the
> CRC16
> value over a byte array of some 1000 bytes?
http://www.retroarchive.org/swag/CRC/index.html
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