Thanks Jan,
I have reached this conclusion too, I didn't understand the
compiler/assembler interaction (and still don't fully, I can't get an
"sts var, Y" to work, but I'll work at it).
Btw. I like using silly names for variables, but only in very small demo
scripts ;-)
Robert
Robert,
I think you want this:
uint8_t get_ram_byte(uint16_t ram_address)
{
uint8_t byte;
asm ("ld %0, %a1" "\n\t"
: "=&r" (byte) : "e" (ram_address));
return byte;
}
By using the "=&r" constraint you tell the compiler that it shall allocate a
register and after the asm routine it shall use its content as the "byte"
variable (which is, btw., a really bad idea for a name of a variable).
JW
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