On Tue, 30 Oct 2001, Miguel Freitas wrote: > Hi, Hi there Miguel, > (..) > (eprom for 80C301), LM1881 (video sync separator, why?), CD22M6494E > (..) You can notice that PIN 7 of LM1881 can detect odd/even fields with a handy transistor logic switch. Such resource is used to selective capture even/odd frames. This ensures proper reading/writing sequence of these frames and also allow a wide range of counters and triggers to operate. When used with multiple input lines this chip can properly gate (using a simple logic or even microcode) the black level of the input video (using a LPF) providing black level restoration at video output when the output selected line(s) is not being gated through. (tipical app.notes from manufct.) Abracos -- HOM: http://www.momentus.com.br/users/hook/ GPG: http://www.momentus.com.br/users/hook/GPG-PauloCastro.asc
