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Forum Index : Microcontroller and PC projects : ASCII VT100 PIC18F 5V Version?
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retepsnikrep Senior Member  Joined: 31/12/2007 Location: United KingdomPosts: 134 |
Perhaps this is for Geoff. I love the VT100 terminal Pic 32 device but I already have an 18F 5v based project and wonder if it's possible to recompile this into a simple cut down version. A lot of us already have keyboards/pads, I/O, usb on our projects but what we are missing is a minimal pinout/component serial to B&W composite video device. There are millions of composite monitors out there just begging to be driven by such as this. Fixed 9600 baud 8,N,1 serial input would do me. But perhaps 36,800 if possible. I've seen it done using an 8pin device. And I used it but it was expensive and closed shop. http://www.speechchips.com/shop/item.aspx?itemid=5 Can we do it with a minimal pinout 12F, 16F or 18F PLL 5V device running perhaps on the internal osc at 30+mhz to negate the need for crystal/caps/voltage regulator as well? The 8pin 12F1822 can run at 32mhz for example? Gen1 Honda Insights. |
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Geoffg Guru  Joined: 06/06/2011 Location: AustraliaPosts: 3282 |
The current VT100 ASCII Video Terminal uses special features of the PIC32MX250 to generate the video signal - so you cannot simply re compile the code for another chip. It might be possible to get a simple chip like the 12F1822 to generate a crude (low resolution) video like the chip that you linked to. However it would require a major software development effort and my first thought was... why bother? The difference between the 12F1822 and the PIC32MX250 is just $2.50 and the PIC32 version is much more versatile, has much better graphics and is working here and now. So, sorry. This is not something that I would like to take on. Geoff Geoff Graham - http://geoffg.net |
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