kopia lustrzana https://github.com/hoglet67/RGBtoHDMI
31 wiersze
1.5 KiB
Markdown
31 wiersze
1.5 KiB
Markdown
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# C128 adapter
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This is an adapater to be plugged between the VIC-IIe and its socket in a Commodore 128.
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Using this the, C64 Video Enchancement Board should in theory be able to work for the 40 columns mode
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display of the C128.
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## Building
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Use the provided gerber files (gerber.zip) to have a the PCB manufactured. Use the provided
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bill of material (c218adapter_bom.ods) to order the necessary parts and solder everything
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according to the silk-screen placement markings. Be careful to get the orientation of
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the various ICs right. Pin 1 is always marked specifically.
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## IC socket
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The VIC-IIe has 48 pins, so a 48-pin socket would be needed. Unluckily, there are no such sockets
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to be found anywhere that have those long solder tails needed to perfectly fit the IC socket in
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the C128 board. So I made the design to use one 40-pin socket together with one 8-pin socket.
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To make things more complicated still, the 8-pin socket is of the narrow variant, so you
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have so split it to halves before mounting.
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## Installation into the C128
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The adapter board should directly fit under the VIC-IIe without relocating any components
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(it was quite difficult to design the board in this way).
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Installing the FPGA board will be pretty difficult, because it does not really fit into the space
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of the removed RF modulator. You will have to remove parts of the metal can of
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the graphics chips and also some small parts of the DIN connector.
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As the original mod was designed with only the C64 in mind, you are pretty much
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on your own here. Good luck!
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