parsec Posted February 6, 2011 Share Posted February 6, 2011 I've been lurking here for a while and thought I'd introduce myself, and at the same time ask for some help. I live in Sweden and work as a software developer. This career started back in the 80's with - guess what - a TI-99/4A. In recent months I contracted a severe case of the retro-flu and consequently started surfing eBay, hunting for a TI. I ended up with two specimens, one of which was boxed, and both PAL versions. I also started writing a space shooter game in Extended Basic and, after realizing (again) how slow this was, went on to assembly using Asm994A/Win994A. I'm now waiting for some cartridges to be delivered from US so that I can test my game on the real thing. A game screenshot is attached below, this is from the XB version that I am now halfway into porting to assembly. Anyway, on to my problem. I want to avoid having to connecting my TI to an old clunky CRT-TV and would instead prefer using a VGA monitor. I looked at a French modification (see here) that would get me composite video out of the RF modulator, which I then could connect to a composite-to-VGA converter. Unfortunately the two modulators I have (models SIEL PHA2036 and PHA2030, made in Italy) are not built the same way. My modulators do not have any obvious connect points like the modulator in the instructions. I noted however that the modulator input was component video so I thought, "Great, I can just build a component cable and plug it into a component-to-VGA converter". Apparently not so easy. From what I have found on the web there needs to be some additional circuitry slabbed on between the TI-output and TV-input for this to work. So my question boils down to this: Does anyone have a schematic of such a circuitry, or could point me to somewhere where I can find this? I've seen discussions about this topic here on AtariAge but have been unable to find information that clearly illustrates how to build such a thing and which components to use. Would appreciate any help I can get! Quote Link to comment Share on other sites More sharing options...
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