AVR-Chat

OK so I've got this mega88 where some bits in registers R0-R15 appear to be permanently set...

if I do 

ldi R16,0
mov R1,R16

R1 has 1 in it!!

Same code on a different mega - everything is OK. Avoid using R1 - everything is OK. Has anyone ever seen anything like that?


Then I have another mega88 on a different project. C software this time (GCC)

(Interrupts are not enabled)
I am doing 
if (Value==0) EepromWrite(0x20,Value);

which it's compiling as
lds r24,0x0115
and r24,r24
breq +2
rjmp +362

However the EepromWrite is happening even when Value is zero, but when I read back the eeprom values, it has stored 0x01. So it seems like the SREG is corrupted somehow, ie the zero flag set when it shouldn't be.

Help! am I going mad?


-- 
Tim Mitchell