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8

The role of Termcap in contemporary Unix-style systems is the same as it always has been: it provides a library and database allowing software to adapt to the varying capabilities of different terminals. These terminals can be physical (connected to a serial port, typically) or virtual, provided by any one of a number of terminal emulators (the console on ...


4

Erm. I think here are a few misunderstandings at work. Termcap is a descriptional database about terminal features (*1), not device configurations. In sense of Unix terminals aren't devices, but something connected to a device. In a more general sense, Unix-devices are (*2) interfaces that can be accessed using OS measures. It may be this basic mixup ...


5

The RJ45 standard just defines which RS232 signal is on which pin of the connector. If your RPi has a genuine RS232 output interface, you don't need to do any more level shifting because that will have been done already. RS232 signals use both positive and negative signal voltages, unlike almost anything else in modern digital electronics. The RS232 spec ...


9

Thanks in large part to the Tandy-Terminfo project, which provides ready-to-compile .terminfo definition for the TRS-80 Model 100 and Tandy Models 102 and 200, I believe the answer is: yes. For example the sequence Esc E will clear the screen, the sequence Esc H will move the cursor "Home", etc. These are set up in that mentioned terminfo file and backed up ...


1

It's kind of an impossible question, since (as others have mentioned), it is entirely dependent on the monitor that you are trying to recreate it on. In fact, I have two identical monitors, HP Compaq LA2306x, side-by-side, with identical settings. If I drag any image/window/text to where I can see part on one monitor and part on the other, there is a clear ...


1

Green screens are still used today, in bank environments IBM iSeries systems are still popular. These terminals are not monochrome anymore, are software based (emulated), but basically they are just old green screens. If you do image search for 'iseries green screen' you can find this colorfull example: Now if I look into terminal settings, green color is ...


1

I have never seen an amber display, but I have seen a whole lot of different hues of green - yellow-ish, blue-ish, cyan-ish, white-ish, deep green, probably whatever the tube maker had left for the mix. And I am even not sure that the "deep green" I remember is at all possible to represent by all-positive RGB values. An important aspect to represent is the ...


18

I dimly recall these two specific hue frequencies were picked because the human eye focuses them the most accurately. Other colors would focus in front of or behind the retina. A modern RGB green is pretty close to the right color of green, I believe so can be used as is. Recreating the old amber on an RGB screen does not work because it generates not a ...


37

If your aim is to recreate more closely the effect of an old CRT (at the expense of readability), whatever color you choose based on the previous answer, you should consider using a very bright (almost white) color for the text itself, and then using the chosen color as a glowing neon-like effect around the outline of the text. For example, here is what you ...


62

Based on the phosphors used for green and amber screens, this answer on Super User gives the following values: i.e. #FFB000 for dark amber, #FFCC00 for light amber, and variations around #33FF33 or #66FF66 for green. Additionally, colours vary with brightness adjustments and with the age of the phosphors. It should be pointed out that reproduction of ...


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