According to the as documentation: (https://sourceware.org/binutils/docs-2.36/as/AVR-Options.html)
"Instruction set avr51 is for the enhanced AVR core with exactly 128K program memory space (MCU types: atmega128, atmega128a, atmega1280, atmega1281, atmega1284, atmega1284p, atmega128rfa1, atmega128rfr2, atmega1284rfr2, at90can128, at90usb1286, at90usb1287, m3000)." But when compiling a program for atmega1280 or avr51 and trying to execute it: $ cat > test.S << EOF > loop: > rjmp loop > EOF $ avr-gcc -nostdlib -nostartfiles -mmcu=atmega1280 test.S -o test.elf $ qemu-system-avr -serial mon:stdio -nographic -no-reboot -M mega \ -bios test.elf qemu-system-avr: Current machine: Arduino Mega (ATmega1280) with 'avr6' CPU qemu-system-avr: ELF image 'test.elf' is for 'avr51' CPU So this fixes the atmega1280 class to use an avr51 CPU. Signed-off-by: Frederic Konrad <frederic.kon...@adacore.com> --- hw/avr/atmega.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/avr/atmega.c b/hw/avr/atmega.c index 44c6afebbb..e3ea5702f5 100644 --- a/hw/avr/atmega.c +++ b/hw/avr/atmega.c @@ -402,7 +402,7 @@ static void atmega1280_class_init(ObjectClass *oc, void *data) { AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc); - amc->cpu_type = AVR_CPU_TYPE_NAME("avr6"); + amc->cpu_type = AVR_CPU_TYPE_NAME("avr51"); amc->flash_size = 128 * KiB; amc->eeprom_size = 4 * KiB; amc->sram_size = 8 * KiB; -- 2.30.1