Wanted : Monitor Capable of TTL RGB

I can't find my 480Z technical manual. The 380Z has _analogue_ RGB ouputs (8 bit colour value split into 2,3,3 bits for the 3 colour 'DACs'). But anyway, there are basically 3 things you need to get right when connecting up a monitor : 1) the scan rates, particularly the horizontal scan rate. Modifying the vertical deflection system for a different rate is not too hard given a scheamtic of the monitor, modifying the horizontal one is. Note that UK and US TV rates are sufficiently close that they are compatible. 2) The colour signals. Going from TTL to analogue is easy (particualrly if you only have 3 TTL signals, RGB, to deal with). Going the other way is a harder. Of course you may find machines that output composite colour video (many home computers) or separate luminance and chrominance (like S-video, some Commodore machines) 3) The syncs [1]. This hasn't been mentioned yet. Some systems use separate syncs, some compoiste sync. To go from separate syncs to composite sync is easy in general. Just XOR the signals together. Separating syncs is a little harder, the LM1881 or it's more modern variants work well. But before doing that, if possible look at the scheamtics of the monitor. I've met a fair number of mobnitors with 'separate sync' inputs where the inputs are XORed (or similar) inside the monitor, then separated again. If that's the case you can feed composite sync into one input and ground the other one/. Sometimes you have to invert the sync signals, but that's easy too. Monitors with SCART socket inputs often take composite sync at a low level on the _composite video input_ pin of the SCART socket. But I've yet to meet one that objects to TTL being fed in here. [1] 'If you ahve sync problems, the picture swims about. Hence the expression "sync or swim"' No, I can't remember where I got that from... -tony