Re: Re: [cc65] How to force a read from a memory mapped register w/o vola=

tile
Date: Wed, 08 Dec 2010 11:13:26 +0100
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Another workaround:

readreg.s:

_readreg:
    lda the_register
    rts

foo.c:

uint8_t readreg(void);
/* or: void readreg(void); */

void function(void)
{
    readreg();
    /* do the rest */
}

should result in:

    jsr readreg

Yes, still overhead of JSR/RTS.

Thomas


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