PET startup sequence?? (was LF: Commodore PET schematics, troubleshooting info)

At 17:43 10/08/2004 -0700, you wrote: Yeah - that did occur to me - hard to diagnose for certain - all the RAM's are soldered in. I did remove and socket the ROM's today - so with an EPROM emulator I can put boot code in fairly easily - anyone know what the minimum I need to do to setup the video and any other essential hardware is? Also a memory MAP would be handy (I think I saw one in the Archive - I'll look, however if anyone knows where the RAM limits are and where Video memory is - could save me sime time. If I can figure out where the RAM is, and how to write to the screen, I can boot a small RAM test in the Kernal ROM space. 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