> How did you do it? I mean, connect your Amiga 1200 to your Sony > KV25-XBR? Nobody I've spoken with at any computer store or Sony dealer has > any idea where to get a cable to connect a computer to the 34-pin RGB port > on my Sony. I even called Sony customer service, and those folks are real > polite but even THEY don't have a clue. I went to a Sony Service Center back in 1985 and purchased the "KV-25XBR/RM-724/APM-X3U Service Manual". It has schematics and lists two options for the RGB MULTI INPUT: 1) The PX-34 RGB multi connector plugs into the back of the TV. It has to be soldered on to the end of a cable that brings RGB data to the TV. 2) The SMK-0001 cable has a PX-34 at one end and a "microcomputer connector" at the other. (From the drawing, it is not obvious whether this is a DB-9 or some other style of connector. The microcomputer in the diagram looks more like a TI-99 than an IBM-PC.) The PX-34 was listed for more than $30, and there was no guarentee that the SMK-0001 had the connectors I needed. So I built my own. I purchased a standard 34-pin connector with flat ribbon cable from a computer store, and wired up a box that has an Amiga-compatible 9-pin video connector, 6 RCA phono jacks (red green blue sync left right), and 2 switches. One switch selects sync-on-green versus separate sync, the other enables TV audio while in RGB mode. The Amiga has a 23-pin video connector, so I had to use either a DB-23 to DB-9 cable, or use a genlock (which uses a 9-pin output connector). 9-pin Video connector (used by A2002 and A1084 monitors, AmiGen genlock): 01 = Sync ground 06 = no connection 02 = RGB ground 07 = combined Sync 03 = Red 08 = no connection 04 = Green 09 = no connection 05 = Blue 07+01 go to a black RCA jack labeled "Sync" 03+02 go to a red RCA jack labeled "Red" 04+02 go to a green RCA jack labeled "Green" 05+02 go to a blue RCA jack labeled "Blue" On a 23-pin Video connector, 03=Red, 04=Green, 05=Blue, 10=Csync, and 16-20 are all ground. Do not use 11=Hsync or 12=Vsync in this case. (On the 9-pin male to 9-pin female cable I was using, I took some wire cutters to pins 06, 08 and 09, since their signals confused my A2002 monitor.) I planned on adding a second DB-9 for CGA (TTL) monitor, but never got around to it. The original IBM PC used 1=GND, 2=unused, 3=RED, 4=GREEN, 5=BLUE, 6=INTENSITY, 7=unused, 8=H-SYNC, 9=V-SYNC. 34-pin RGB connector: 01 = +5V 18 = no connection 02 = +5V 19 = no connection 03 = ground 20 = Audio, Right 04 = ground 21 = Mode Switch (digital RGB vs analog RGB) 05 = Remote Ctl gnd 22 = no connection 06 = Composite gnd 23 = Video (composite) 07 = Audio ground 24 = Audio, Left 08 = Red ground 25 = Red 09 = Green ground 26 = Green 10 = Blue ground 27 = Blue 11 = Ground 28 = no connection 12 = Blank ground 29 = Blanking 13 = Hsync ground 30 = H-sync 14 = no connection 31 = V-sync 15 = Vsync ground 32 = no connection 16 = Ground 33 = RGB vs Normal 17 = no connection 34 = Audio Select (+5v enables audio) 01+34 go to a SPST switch (to enable audio while in RGB mode) 20+03 go to a red RCA jack labeled "Right" 24+07 go to a white RCA jack labeled "Left" 25+08, 26+09, 27+10 go to the Red, Green, Blue jacks (and Amiga connector) 13 goes to the Sync jack ground, 30 goes to a SPDT switch, which connects it to either the Sync jack (separate) or the Green jack (sync-on-green) The phono jacks are useable by a "GIGI" (DEC VK100 terminal with BASIC). The 9-pin connector is useable by an Amiga 23-pin to 9-pin cable, or by the 9-pin output of an AmiGen genlock. See also the "Sci.Electronics.Repair FAQ on Pinouts" http://www.repairfaq.org/REPAIR/F_Pinouts3.html#PINOUTS_015 for "Sony RGB Multi Input (found on KV-25XBR TV's). Links to other documents: *) http://www.hut.fi/Misc/Electronics/circuits/vga2tv/ for details on converting VGA video (15 pin) to NTSC (CGA, 9 pin). *) http://home.att.net/~billhudson/rybyrgb.pdf has a component (YPrPb) to RGB converter. *) http://elm-chan.org/works/yuv2rgb/report.html - look for "Circuit Diagram 3 (Simplified Lv.2) BG part is omitted (Sync on RGB)". -- Joe Smith CA license plate: "POPJ P," 36-bits forever! Humorous disclaimer: "My Amiga 3000 speaks for me." http://www.inwap.com/