Started by WacKEDmaN, 19:35, 09 December 20
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Quote from: WacKEDmaN on 19:54, 09 December 20thanks ToTO, ill wire up the scart and kick it in the guts... hopefully theres not other issues on the board...i hope i dont have to break out the sillyscope!it does seem a bit strange the side pin on the barrel jack socket is connected to 5v positive on the main chips.. and the one coming from the centre is neg... yet it seems swapped from the actual 5v plug... all the other barrel jack sockets ive played with are outside to side pin, and then centre to centre... this seems swapped :/i guess theres some inverse logic going on here...tested side pin on the barrel jack socket to bottom RIGHT pin of the 74LS132p and they are indeed ground... (i looked up the datasheet!)im confuse! ..but ill work it out! (ahh im workin from the top of the board!.. flip it..and yes bottom left is gnd ..top right is pos!)
Quote"The standard monitors on the Amstrad (GT6x, CTM64x, CM14 or even TV) have a 50Hz Vertical refresh rate (meaning that a VSync pulse must appear every ~20ms, 19968μs exactly) and a 15625Hz Horizontal refresh rate (an HSync pulse every 64μs). Of course they can usually tolerate some slight variations of these timings but each monitor has it's own limitations."
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