Date: Thu, 17 Jul 1997 07:04:06 -0400 (EDT) To: tghack-list@joyce.eng.yale.edu From: Mark Campbell X-Software: mlf2 v2.42/Platinum, Copyright 1995-1997 by Bt X-Original-Id: <199707171131.MAA11602@subtitling.com> Subject: SCART modification for PCE X-UIDL: 81f112ec5091c0b1ebef521465b159fa Hi, After looking at Joes trace of the extension bus (cdrom interface) which is mentioned on the list server as "how to get NTSC video from a PCE" or something like that - it dawned on me that there was enough information and the correct signals available to get 60Hz RGB video into a european SCART TV (obviously, it needs to be a modern one that can handle 60Hz - but most can). I performed this mod on my core grafxII, the pinout should be the same on all non cd integrated machines (tg16, PCE white, core grafx, shuttle, LT etc. ) - however you may have to improvise with the drilling and finding the ground plane. The way I went about it was to drill a small hole in the side of the case, near the front, on the lefthand side next to the A/V socket. Then I tagged the wires from a thin cable scart lead fed through the hole to the solderpads of the ext bus. Doing it in this location ensures that the cable would not interfere with a cdrom 2 base unit. Ok, here we go: The PCE side is represented by a numbered position as if looking from the back of the machine correct way up, eg. 1..........................23 24........................46 47........................69 Remember that when you come to look at the underside of the board (not the component side, but the solder side) with the connector to the top of the board, the connections will look like this, this *is* important make sure you get it right. 47........................69 24........................46 1..........................23 Scart Plug Connections PCE connector tags 2 R. Audio Input Pin 1 4 GND (Audio) Ground Plane 6 L. Audio Input Pin 47 7 Blue Input Pin 23 11 Green Input Pin 46 15 Red Input Pin 69 16 Fast Video Blanking Pin 21 18 GND (Fast Video Blanking) Ground Plane 20 Composite video/sync. Pin 22 There is a large ground plate on the underside of my core grafx, this is where I tagged my two ground connections, if this plate doesn't exist for some reason on your board, then you need to find the ground track and tag the wires there. To ensure the cable is secure in the case, I glued a grommet to the cable and case and it seems to work fine. It is possible to tag the ext bus wires to a 9way connector of some sort which you could install in the case - making it possible to remove the cable if needed, but I'll leave that to you. This modification worked beautifully with my daewoo tv at home and with our small sony tv's at work, I haven't tested it with any other televisions, but as long as they can scan to NTSC frequencies then they should be ok. I don't know of the popularity of the SCART / Euroconnector in the US or Japan, but I know how popular it is for europeans. This means that you can use any PCE / TG16 on a PAL TV with no slowdown and no boarders. happy Bonking/Zonking, Mark Campbell Once a poor student who dreamt about owning a PCE - now one of the employed realising that dream.