Python on a Classic Uno: 38 Bytes of Code, Zero RAM

1from machine import Pin
2import time
3
4led = Pin(13, Pin.OUT)
5
6while True:
7    led.toggle()
8    time.sleep_ms(500)

1; Generated by pymcuc for 
2.equ RAMSTART, 0x0100
3.equ _stack_base, RAMSTART
4.equ RAMEND, 0x08FF
5
6.org 0x0
7.global main
8	JMP	main
9.org 0x4
10	JMP	__bad_interrupt
11.org 0x8
12	JMP	__bad_interrupt
13.org 0xc
14	JMP	__bad_interrupt
15.org 0x10
16	JMP	__bad_interrupt
17.org 0x14
18	JMP	__bad_interrupt
19.org 0x18
20	JMP	__bad_interrupt
21.org 0x1c
22	JMP	__bad_interrupt
23.org 0x20
24	JMP	__bad_interrupt
25.org 0x24
26	JMP	__bad_interrupt
27.org 0x28
28	JMP	__bad_interrupt
29.org 0x2c
30	JMP	__bad_interrupt
31.org 0x30
32	JMP	__bad_interrupt
33.org 0x34
34	JMP	__bad_interrupt
35.org 0x38
36	JMP	__bad_interrupt
37.org 0x3c
38	JMP	__bad_interrupt
39.org 0x40
40	JMP	__bad_interrupt
41.org 0x44
42	JMP	__bad_interrupt
43.org 0x48
44	JMP	__bad_interrupt
45.org 0x4c
46	JMP	__bad_interrupt
47.org 0x50
48	JMP	__bad_interrupt
49.org 0x54
50	JMP	__bad_interrupt
51.org 0x58
52	JMP	__bad_interrupt
53.org 0x5c
54	JMP	__bad_interrupt
55.org 0x60
56	JMP	__bad_interrupt
57.org 0x64
58	JMP	__bad_interrupt
59
60__bad_interrupt:
61	JMP	main
62
63main:
64	CLR	R1
65	LDI	R16, hi8(RAMEND)
66	OUT	0x3E, R16
67	LDI	R16, lo8(RAMEND)
68	OUT	0x3D, R16
69	LDI	R28, lo8(_stack_base)
70	LDI	R29, hi8(_stack_base)
71
72	SBI	0x04, 5
73
74L_46:
75
76	SBI	0x03, 5
77
78	LDI	R18, 85
79	LDI	R19, 88
80	LDI	R20, 20
81	LDI	R21, 0
82_dly_L0:
83	SUBI	R18, 1
84	SBCI	R19, 0
85	SBCI	R20, 0
86	SBCI	R21, 0
87	BRNE	_dly_L0
88	JMP	L_46