import sys

def patch_edid(input_file, output_file, target_hz):

with open(input_file, 'rb') as f:

edid = bytearray(f.read())

# DTD 1 Timings (Standard für dein Panel)

h_active = 1920

h_blank = 184 # 16+16+152

v_active = 1080

v_blank = 36 # 3+14+19

h_total = h_active + h_blank

v_total = v_active + v_blank

# Berechne Pixeltakt für Ziel-Hz

# Pixel Clock in Hz = H_total * V_total * Hz

pixel_clock_hz = h_total * v_total * target_hz

# EDID Spezifikation: Pixel Clock in 10 kHz Einheiten

edid_clock = int(pixel_clock_hz / 10000)

# Patch Clock (Little Endian) an Offset 54 und 55

edid[54] = edid_clock & 0xFF

edid[55] = (edid_clock >> 8) & 0xFF

# Checksumme neu berechnen (Byte 127)

edid[127] = 0 # Temporär auf 0 setzen

new_checksum = (256 - (sum(edid[:128]) % 256)) % 256

edid[127] = new_checksum

with open(output_file, 'wb') as f:

f.write(edid)

print(f"Datei: {output_file}")

print(f"Pixeltakt: {edid_clock * 10 / 1000:.2f} MHz")

print(f"Checksumme: {hex(new_checksum)}")

patch_edid('original_edid.bin', 'overclock_90hz.bin', 90)