Videopac / Odyssey2 forum

Anything not specifically Videopac / Odyssey2 => Other Systems => Topic started by: gertk on December 18, 2011, 01:14:05 PM



Title: Picked up a P2000T
Post by: gertk on December 18, 2011, 01:14:05 PM
Latest addition..

And it is in full working order  :)
Even the 12 tapes are working 100%


Title: Re: Picked up a P2000T
Post by: gertk on December 18, 2011, 01:14:29 PM
with all this...


Title: Re: Picked up a P2000T
Post by: Rene_G7400 on December 18, 2011, 03:30:48 PM
Nice!  :)


Title: Re: Picked up a P2000T
Post by: ccc--- on December 18, 2011, 07:01:49 PM
Back in the mid-Eighties we had those at commercial academy! Together with monochrome monitors. And the monitors had two disk drives built-in  8)


Title: Re: Picked up a P2000T
Post by: Rene_G7400 on December 19, 2011, 12:49:30 AM
Together with monochrome monitors.

That's a pity: the P2000 is capable of displaying 8 different colors (!).  :)


Title: Re: Picked up a P2000T
Post by: ccc--- on December 19, 2011, 02:31:31 PM
Well, the computers were for bookkeeping lessons and teaching BASIC basics - so they probably didn't need any color  ;D


Title: Re: Picked up a P2000T
Post by: gertk on December 19, 2011, 06:45:07 PM
Well, the computers were for bookkeeping lessons and teaching BASIC basics - so they probably didn't need any color  ;D
So, how did they do syntax highlighting? Oh wait...  :D


Title: Re: Picked up a P2000T
Post by: gertk on December 19, 2011, 06:49:38 PM
BTW Basics: seems to be the P2000T 16k Basic seems is not a Micro$oft product, at least no copyright text.
And even the error messages are in Dutch! And it has a Z80 so.. Maybe a C7420 with real Philips Basic  :)


Title: Re: Picked up a P2000T
Post by: Rene_G7400 on December 19, 2011, 09:04:22 PM
BTW Basics: seems to be the P2000T 16k Basic seems is not a Micro$oft product, at least no copyright text.
And even the error messages are in Dutch! And it has a Z80 so.. Maybe a C7420 with real Philips Basic  :)

At the back of the P2305 BASIC interpreter cartridge the sticker clearly says: "? by Microsoft, 1980"


Title: Re: Picked up a P2000T
Post by: gertk on December 19, 2011, 09:32:44 PM
Hmm.. another bubble busted  :)
Strange that the message is not on screen..


Title: Re: Picked up a P2000T
Post by: Seob on December 21, 2011, 10:21:43 PM
Sold mine last year. I was selling of some of my 8 bit computers, because of storage space trouble. Also sold my laser 2001 and 2x comx35 systems. I have kept one tape, because i like different storage systems.


Title: Re: Picked up a P2000T
Post by: revivalstudios on December 23, 2011, 08:17:18 PM
We had these at our "basis"-school back in the early 80s, i even remember some kind of muchkin like game on it


Title: Re: Picked up a P2000T
Post by: gertk on December 24, 2011, 12:13:18 PM
We had these at our "basis"-school back in the early 80s, i even remember some kind of muchkin like game on it

On one of the tapes I found something like that, in 'high resolution' teletext graphics  :D

Found a video of it, it is called Lady/Lazy Bug

http://www.youtube.com/watch?v=JDe2K3UapJ0



Title: Re: Picked up a P2000T
Post by: ccc--- on December 25, 2011, 09:17:36 AM
Amazing, looks like G7400/C7420 graphics, probably a similar teletext graphics chip?


Title: Re: Picked up a P2000T
Post by: gertk on December 25, 2011, 01:57:09 PM
Amazing, looks like G7400/C7420 graphics, probably a similar teletext graphics chip?

Oh no, it is far less advanced: it is a SAA5050, used in the very earliest of TV sets.
It has no user definable graphics for example, just the 3x2 block graphics, 8 colors, blinking and double height and that is it.
For every attribute change you loose a character position on screen..
 


Title: Re: Picked up a P2000T
Post by: ccc--- 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?


Title: Re: Picked up a P2000T
Post by: gertk 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  :)

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.


Title: Re: Picked up a P2000T
Post by: Rafael 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).


Title: Re: Picked up a P2000T
Post by: ccc--- on December 27, 2011, 09:44:01 AM
Very interesting info. Thanks gert!