Re: Slow writing programmer



I've set everything up as you described. I've however had to go as low as 1.5MHz on some hp elitebook folio 9470m laptops. Some models have a (only recently supported) numonix N25Q128..3E chips which are harder to flash (require lower speeds) than the W25Q128 chips. And even the folios with winbond chips vary greatly, some I can read with speeds up to 30MHz without errors, however those are few and write speeds are lower in the range of 2MHz and even then I have to do it multiple times to get a good flash. I only managed to make it work...

Re: Slow writing programmer



Hi I was wondering: Do you use an external PSU for ISP flashing of bios chips (of laptops f.e.) with your raspberry pi, if so how do you wire it? And does the raspberry pi version matter (3 or 4)? As for using the original power adapter there should be no question about that. Any tips though on how to reach high SPI speeds (>5MHz)? I think what can be reached differs per mobo right?...