![]() ![]() I set them to about 250 Ohms as this seemed to drop the voltage down to what his converter needed. These are not shown in the schematic (may not be needed, depending on tolerance of VGA converter that you use). On the right is the male HD-15 connector that goes to your VGA adapter.īecause I don't own the VGA adapter he does, I added 1k Ohm variable resistors to all the VGA output lines (except ground). In the center is the pull-both circuit that adds Intensity to the R,G,B lines. On the left side is the male DB-9 connector that goes to the C128. I'm glad to report that it works! Below is the schematic diagram if you would like to build one yourself. So first, Miro Karkus asked me to build an RGBI converter for use with his RGB to VGA adapter. This has been reported to provide acceptable results (both PAL and NTSC) with one major exception: you get only 8 colors! The converter has a 15-pin input, so the cable is needed to use with the 9-pin connector on the Commodore 128. That particular converter needs a special 9-pin to 15-pin cable. The easy way is to use an RGB to VGA adapter, such as one available from Ambery. This page is about a VGA solution (other solutions are S-Video and SCART). RGBI is similar to VGA, but uses different voltages and horizontal frequency which most VGA monitors do not like. This poses a problem for C128 owners due to the dwindling supply (and expensive shipping) of RGBI and CGA monitors (CGA is very much like RGBI). Unfortunately, the RGBI output of the VDC is not compatible with modern equipment. ![]() The VIC is easy to connect to common video displays (TVs and monitors) due to various widely-used outputs: Composite, Chroma/Luminance (S-Video), and RF (analog TV antenna). The VDC also supports video interlacing in hardware. It offers higher resolution than the 40-Column display of the VIC-IIe (8564 NTSC, 8566 PAL-B often called simply VIC). The Commodore 128 features an 80-Column color display using an RGBI output via the 8563, known as the VDC. ![]()
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