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Questions tagged [screen]

for questions about retrocomputing screens or terminals

8
votes
1answer
502 views

Why green phosphor instead of amber?

According to this answer to Why were early personal computer monitors not green? they had a severe disadvantage in that you had to choose between 'too dim' and 'rapid burn-in' whereas amber could ...
7
votes
1answer
392 views

On the bbc-micro, a half-size mode 1 screen mode with 16 colours instead of 4 can fit in memory but can the video chip be programmed for it?

Screen Mode 2 on the BBC micro is 160 x 256 with "16"* colours. This uses up 20Kb of memory. Horizontal-rectangular pixels ( 2 x squares each). 4 bits per pixel (0-15 values for 16 colours) Screen ...
29
votes
5answers
8k views

Why were early personal computer monitors not green?

Green was traditionally the most common color for computer monitors; it combines strain-free readability with low cost. Given this, it's surprising that the first versions of the Commodore PET and ...
5
votes
1answer
63 views

No Brightness Controll on a Compaq Contura 3/20 Laptop

On my old Compaq Contura 3/20 I can adjust the contrast, but there 's no effect using the brightness button. Is there something to do on this?
1
vote
1answer
62 views

PowerBook 145 Screen Issues

I have a PowerBook 145 that boots up because I can hear the chime but the screen doesn’t come on. The back light is functioning but no data can be viewed on the screen. What can I do?
8
votes
3answers
400 views

Connectors for green screen versus color monitors

Consider a pair of early 14" CRT monitors, one green screen 80x25 text, one color 640x480 graphics. It seems reasonable to conjecture that both could have the same resolution; at least if you suppose ...
13
votes
2answers
2k views

Square pixels and TV output

Another question about color computers in the days of CRT televisions! There is a consensus that pixels should be square, and so they typically are on purpose-designed monitors. However, looking at a ...
6
votes
1answer
126 views

ZX Spectrum+ with SCART Interface doesn't display anything

I have an ZX Spectrum+ that came with a SCART interface (unknown brand, all I know is that it's french and that the blue logo seems to spell "IS"). It didn't came with its original power supply so I ...
8
votes
1answer
522 views

Saving the screen on a ZX Spectrum without the prompt

Saving the screen on a Spectrum will typically get part of it obscured with the message “Start tape, then press any key.”: How might one save the screen image from Sinclair BASIC without it being ...