23 replies to this topic

[AlephMobius]

How do you make an AFX add-in capable of going back right where you left it after pressing MENU like all the built in ones? I am using Turbo C.

[huhn_m]

I'm not sur? but I think it is not possible.

[X-thunder28]

It' s possible (take a look on scorch for exemple)!

All you have to do is to use Getch() for input... with all disadvantages that include!

[AlephMobius]

On a similar note, being that I am using getch in Turbo C how do I tell the difference between two keys that return the same key code? For example DEL and the multiply key or ALPHA and 8. If it cant be done with getch, is there a way to do it so that the MENU key still brings you to the menu? TIA

[2072]

As I remember, some keys return 2 values: the value (char)0 and another (char) value. That's why some keys seem to return the same thing... So you have to test if getch returns 0 and then test getch again.

[AlephMobius]

Can you display inverted letters with the standard console font? I mean letters that have a black background and white lettering.

[huhn_m]

Yes you can. One of the functions (either 0h or 0Eh) of Int 10h
you can output characters with needs a special parameter and
prints things inverse then.

I'm at school so I don't know the values exactly. I'll look after it when I'm
at home.

[[neo]f4kill]

         mov ah,0eh
          mov al,41h
          int 10h

this prints the letter 'A' as you want

in C you can do this :

void print(char caracter)
{
          asm{
                    mov ah,0eh
                    mov al,caracter
                    int 10h
          }
}

(not tested made quickly!)

[AlephMobius]

Thank you all for you help. Maybe I should have named the topic C questions. Unfortunatly, the freely available version of Turbo C on Borland's site does not allow in-line. Can the same thing here be done in C or does anyone know if the professional version of Turbo C is available somewhere? Also, is the beginning of the video memory static and if not, how can I find it?

[huhn_m]

Goto 2072productions.com and download the CDK (casio Development Kit)
that was assembled by the french I think. It contains an older version of TC that
is no longer distributed by borland and can compile 80286 specific code.
(this is important for the calc!) and emulate FPU.

You can also use the C functions (printf and so on) but I'd recommend to rewrite
them at least partly because this will give you some additional speed and
a lower filesize.

[AlephMobius]

To answer my own question, you can use the int86 function from dos.h to do the same thing that asm does. So what about the start of video memory and how can I read BASIC files in RAM?

[2072]

The start of the video memory can be found at 0x4E:0x0 usually it's 0x1A20:0x0

To read the Basic files you need my library called "Memzones", that you can download at http://www.2072produ...prog_source.php

[AlephMobius]

I am trying to get inverted text to work with this little example, but it doesn't work like I expect.

#include <stdio.h>
#include <dos.h>
#include <conio.h>

void dchar(const char c)
{
	union REGS inr,outr;
	inr.h.ah=0xE;
	inr.h.al=c;
	int86(0x10,&inr,&outr);
}
void dp(const char*s)
{
	int i;
	for (i=0;s[i];i++)
	{
  dchar(s[i]);
	}
}
int main()
{
	clrscr();
	gotoxy(1,1);
	dp("This is dark");
	gotoxy(1,2);
	dp("This is not dark");
	getch();
	return 0;
}

The first line printed is inverted but the second is not. If I just print the first line without the second, it is not inverted. If I change main to just do clrscr then dchar, it doesn't print an invertedcharacter, If I put a gotoxy between clrscr and the dchar, it works fine. It did some other weird things I can explain, but hopefully you have figured out what is wrong by now.

[huhn_m]

This might be due to the fact that the calcs Bios interrupts (also int 10h)
are not 100% compatible to PCs BIOS interrupts.

You should rewrite the routines like gotoxy in pure ASM to ensure that they
only do what is possible on the calc.

[AlephMobius]

Thanks for the advice huhn_m. gotoxy works exactly how I want it to for everything else, but it obviously has a problem with what I am trying to do. I dont know asm so I cant rewrite the function. Can someone please give me an example of inverted text in C with no asm?

[2072]

As I remember of my experience with DOS text console, you need to invert the text before each write, that's the same for colours etc...

[betoe]

I think you can find a "gotoxy" or "locate" macro on internet. I used a macro for this the last semester for the subject "Microprocessors 2", that was 8086 programmation.

Unfortunately i search that macros but i dont find them in my HDD. So start searching sites with MACROS on the net, or wait for other post.

[AlephMobius]

2072: I dont understand. Do you see something I am doing wrong in my example?

[2072]

in fact no, I didnt read your code correctly... it should work.

Did you try the following syntax to make asm with your compiler?

void print(char caracter)
{
asm  mov ah,0eh;
asm  mov al,caracter;
asm  int 10h;
}

[AlephMobius]

Yes, I did try the asm block but as I explained in an earlier post, asm blocks don't work in Turbo C if you don't have the professional version. That is why I am trying to do it in C. Thanks so far.

[2072]

ASM blocks don't work but writing "asm" before each instruction (like I did in my previous post) may work, it does with TC2.0.

You can use Digital Mars, a free compiler to make your program on the AFX.

[AlephMobius]

I don't have my transfer cable with me so I can't test to see if the asm works but I at least got it to compile after switching from TC 2.0 to TC++ 3.0. Thanks for your help. Is it possible to access the fn memories or the A-Z and theta variables? Thanks again.

[2072]

It's written in the readme file of the memzone library.

[AlephMobius]

#include <stdio.h>

void dprint(const char*msg)
{
  int i;char rb;
  for (i=0;msg[i];i++)
  {
    rb=msg[i];
    asm mov ah,0eh;
    asm mov al,rb;
    asm int 10h;
  }
}

int main()
{
  dprint("Hello World");
  getch();
}

I did everything like y'all said but it still does not work! Any other suggestions?