SNESDEV

Once again an other issue. This time it’s about the WDC linker that seems not to be able link against C library. I already have sent a few email and ticket support to the wdc team. Still no response since my first enquiry 2 months ago. It’s been a while now that the direct to the freesdk have been removed.

So here is the source code that is having the problem and need to be linked with c.lib or cs.lib (small model) :

main.c

typedef    unsigned char    byte;
typedef    unsigned short    word;

typedef struct padStatus{
    byte right:1;
    byte left:1;
    byte down:1;
    byte up:1;   
    byte start:1;    // Enter
    byte select:1;    // Space
    byte Y:1;    // X
    byte B:1;    // C
    //--------------------------------
    byte Dummy:4;
    byte R:1;    // Z
    byte L:1;    // A
    byte X:1;     // S
    byte A:1;    // D
} padStatus;

padStatus readPad(byte padNumber) {
    word test;
    // TODO fix usage of padStatus structure
    padStatus *status;

    // TODO move ot dedicated function
    // enable pad ready
    *(byte*)0x4200 = 0x01;

    // check if pad is READY !!!
    padNumber = padNumber << 1;
    test = (word) *(byte*)0x4218+padNumber << 8;
    test |= (word) *(byte*)0x4219+padNumber;

    status = (padStatus *) &test;

    return *status;
}

void main(void) {
    padStatus pad1;

    // Infinite loop
    while(1) {
        pad1 = readPad((byte) 0);

        if(pad1.up == 1) {
            *(byte*) 0x2100 = 0x00; // disable background
        } else {
                   *(byte*) 0x2100 = 0x0f; // enable background
        }
    }
}

This can be compiled with this command line :

wdc816cc -wl -wp -MS -MO -SOP main.c

The -MS is for specifying the Small code layout. So it should be linked with the “cs.lib”. But the here is the output of the linker:

wdcln -V -W -LC:\65xx_FreeSDK\lib\cs  main.obj -O test.smc
WDC 65C816 Linker Version EVALCOPY Jan 18 2006 17:36:51
   Copyright (C) 1992-2006 The Western Design Center, Inc.
Undefined symbol: __~mov

The __~mov symbol cannot be resolved but it is in the cs.lib. So I think that the linked dont link correctly. If anyone got any any idea on why. Feel free to leave a comment.

++ Lint

PS : I’m still working on the two effect and debug text output, expact an update in a few days.

FIXED !!! Look at the comments !!!

This entry was posted on Wednesday, May 7th, 2008 at 9:26 pm and is filed under Snes, Software dev. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.