CRT displays [was: computer graphics in the 1950s]
ard at p850ug1.demon.co.uk
Tue Oct 21 12:54:16 CDT 2008
[Raster-scan characters on a vector display]
> The Tektronix 4052 and 4006 (and presumaby 4051 and 4012) do this.
> These machines all have storage-tube vector displays, but when you want
> to display text, scan a little dot matrix of the character. The 4052 at
> least can put this little dot matrix at any addressable point on the
> screen, not limited by the character block spacing or even (AFAIK) the
> dot matrix spacing.
I believe that's true of the VT11 too. You can put a character wherever
you want it .
> (The 4014 and 4054, iirc, drew the characters in a line draw font, which
> meant they could be scrolled or rotated. I don't have either... yet)
Interesting. I knew the main differnce between the 4051 and 4052
(processor goes from a 6800 to a oard of 2900-series chips implementing
most of the 6800 instruction set). But I assumed the 4054 was just a
4052 with a larger CRT. I didn't realise there were design differences too.
Not that it matters to me. I don't have any of them, and I don;t think
I'm likely to find them
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