Here are the codes for the 8050/8250 http://www.devili.iki.fi/Computers/Commodore/8050/Service_Manual/page_5.htm… The 6 flashes indicate a failure in the first bank of 2114 memory. Paul -----Original Message----- From: cctech-bounces(a)classiccmp.org [mailto:cctech-bounces@classiccmp.org]On Behalf Of Dave Dunfield Sent: Saturday, September 11, 2004 1:27 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Commodore PET disk drive power-up error codes Hi Guys, Does anyone have information on error-codes that are flashed by PET disk drives after power-up diagnostics fail. I have a drive set which after powerup, enters into a state where it flashes the POWER LED alternating with both drive LEDs (together) - It repeats this flash cycle exactly 6 times, then pauses, then another 6 ... forever. I assume it's a diagnostic failure - Can anyone tell me what it means? Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html