On 12/09/2011 04:17 AM, Richard wrote: Yes, that is a CDP board. Pictures of all my Lilith boards are on ftp://jdreesen.dyndns.org/ftp/Pictures/ Feel free to add them to you collection . Al, that is valid for you too of course . The CDP handles RS232, mouse X/Y counters, keyboard and some other stuff i cant remember now. Mine is rev A, yours is rev B, can't see much changes. Mine has no ECO's. Strange to see U6 fitted, it is only required when you have an actual quartz crystal instead of a canned oscillator. Yours is marked "BAD". First line of attack are the 1488/89 RS232 drivers. The Lilith has several identical DB25 connectors, misconnecting one will kill these drivers. Jos