ld hl,#_addr ?

[funkheld]

Hi good afternoon.


I would the 0xc000 from addr to hl.
what is wrong there please?


the value x is passed.


thanks.
greeting

Code Select Expand



#include <cpctelera.h>


u8 x;
u16 addr;


void datascr() {
__asm
   ld a,#_x
   ld hl,#_addr
   ld(hl),a
__endasm;
}


int main() {
    cpct_disableFirmware();
    cpct_setVideoMode(2);
   
     x=255;
     addr=0xc000;
     datascr();
   
    while(1);
}


[ervin]

You are loading the address of x into the A register.

[funkheld]

how do i get this 0xc000 from addr in hl?


thanks.

[ronaldo]

Please, stop tagging as "cpctelera" questions that have nothing to do with CPCtelera.

This is an assembly question, and should go into the assembly programming forum, more precisely into a newbie corner.

@Gryzor.

[SRS]

How about "native C" ?

Code Select Expand

#include <cpctelera.h>

int main() {

u8 x;
u16* addr;

    cpct_disableFirmware();
    cpct_setVideoMode(2);
   
     x=255;
     addr=0xc000;
   
    *addr=x;
   
    while(1);
}

[reidrac]

That addr should be a pointer to byte, not to word; isn't it?

Code Select Expand


u8 *addr;

addr = (u8 *)0xc000;
*addr = 255;


EDIT: OK, mode 2. May be you did it on purpose!

[Gryzor]

Please, stop tagging as "cpctelera" questions that have nothing to do with CPCtelera.

This is an assembly question, and should go into the assembly programming forum, more precisely into a newbie corner.

@Gryzor.

Do we have an assembly subforum?

[AMSDOS]

Do we have an assembly subforum?

Does 'Listings' in the 'Deutsches CPC-Forum' qualify? 

[ronaldo]

Do we have an assembly subforum?

I think I got carried away and imagined forums and subforums in my own parallel reality .

Anyway, a newbie assembly corner could be useful.

[Gryzor]

I think I got carried away and imagined forums and subforums in my own parallel reality

We all do from time to time, nothing to worry about.

Anyway, a newbie assembly corner could be useful.

As always, if more people find it a good idea I'll be more than happy to add whatever!

[GUNHED]

Does 'Listings' in the 'Deutsches CPC-Forum' qualify? 

No, "Listings" is for type-in stuff.

[SRS]

How about "https://www.cpcwiki.eu/forum/programming/asm-source-code/" ?

[funkheld]

hello, thanks for the help.


greeting.

[Gryzor]

How about "https://www.cpcwiki.eu/forum/programming/asm-source-code/" ?

That's a thread though, not a forum?

[freemac]

You can add some C code into your asm function (param+=1) and see the .asm file resulting. Like a hacker 

Code Select Expand

void toto(unsigned char c) {
__asm
TADA
__endasm;
c=c+1
}

[SRS]

That's a thread though, not a forum?

We need a forum about "What's a forum, a subforum and a thread for newbies ...." !

[Gryzor]

We need a forum about "What's a forum, a subforum and a thread for newbies ...." !

Surely you mean a topic? 😂