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Author Topic: Picked up a P2000T  (Read 4962 times)
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Post Axe Pete!
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« Reply #15 on: December 26, 2011, 09:51:33 AM »

But the letters and numbers have the same design. So both have to do something with teletext?
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gertk
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« Reply #16 on: December 26, 2011, 11:20:44 AM »

But the letters and numbers have the same design. So both have to do something with teletext?

Eh, yeah, that was what I meant  Smiley

Here is a link to some info on that chip: http://en.wikipedia.org/wiki/Mullard_SAA5050
It also describes the anti-aliased font which was specially designed for interlaced TV sets

The EF934x chips (as in the G7400) have some very nice additions so you can do parallel attributes (for each character) and user defined character bitmaps. Something you could not do with a SAA5050 but then the SAA5050 could work with just 1 kByte of RAM.

The BBC micro had a SAA5050 for its default text mode (using only 1 or 2 kByte of the precious 32k memory) and an extra custom chip for generating high resolution graphics: 'mode 0' being a 640x200 graphics mode generating 80 colums text and graphics (mixable) but used up a whopping 20k of the 32k RAM leaving only a small amount for Basic or other programs.
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>>G7000 G7200(P+S) G7400 N60 JET27 VG5000 ZX80 ZX81 ORIC-1 COMX35 Aquarius<<
Rafael
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« Reply #17 on: December 26, 2011, 12:06:45 PM »

How I know, it was never released here. I deicovered it by emulation. It have a pretty shotter called Fraxxon (it?s not a Zaxxon clone).
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ccc---
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« Reply #18 on: December 27, 2011, 09:44:01 AM »

Very interesting info. Thanks gert!
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