Author Topic: Revision 2015 8088 demo  (Read 6090 times)

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Online Bryce

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Re: Revision 2015 8088 demo
« Reply #10 on: 15:55, 08 April 15 »
AGA was only on the Amiga and the CD32.

Are you confusing VGA or similar?

I don't mean that they actually used Amiga AGA, rather the abbreviation "AGA" was commonly used for all sorts of graphics cards and other devices.

Eg: Alienware Graphics Amplifier = AGA

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Offline MaV

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Re: Revision 2015 8088 demo
« Reply #11 on: 16:04, 08 April 15 »
There's the Amiga AGA:
Amiga Advanced Graphics Architecture - Wikipedia, the free encyclopedia

And then there's the Commodore PC AGA. Many German pages reference it in google but there's hardly info in English about it:
What is an AGA? (*not* AMIGA) - comp.sys.cbm
It is just a combined CGA/Hercules card just like any other non-genuine CGA card in the late 80s.

I didn't know that the term was used more profusely in the tech industry back then as Bryce mentioned. But then again, a CGA/Hercules card was just that and didn't deserve a fancy term for it (the reason for my mentioning suits and their BS terms which only serves to confuse people.)


Here's a few German pages with the info:
Commodore PC-10 bis PC-60 – Wikipedia
Advanced Graphics Architecture – Wikipedia <-- mention of renaming Amiga AGA to AA because the PC AGA has already been in use.
http://www.dosforum.de/viewtopic.php?f=1&t=7946
« Last Edit: 16:09, 08 April 15 by MaV »
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Offline MaV

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Re: Revision 2015 8088 demo
« Reply #12 on: 16:35, 08 April 15 »
To make color effects like the ones on the demo you need a cga adapter with a ntsc composite video output.
Yes, and I remember that most of the CGA cards I had come across had such a composite video output, even a lot of the combined graphics cards.
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Offline McKlain

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Re: Revision 2015 8088 demo
« Reply #13 on: 17:08, 08 April 15 »
Yep, a friend of mine had an 8086 PC compatible with a CGA card with composite output back in the day, but as you can imagine when he tried to plug it on his tv all he got was a black and white image.
« Last Edit: 17:25, 08 April 15 by McKlain »

Offline remax

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Re: Revision 2015 8088 demo
« Reply #14 on: 12:02, 09 April 15 »
does it work on an Amstrad PC1512 ?


I mean, PC1512 wasn't a 100%CGA compliant, but the 640x200x16 was great.


No, it doesn't even work on a lot of 8088 4,77Mhz clones.

Offline MacDeath

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Re: Revision 2015 8088 demo
« Reply #15 on: 18:48, 09 April 15 »
I guess an Amstrad PC1512 is a complete powerhouse compaired to first IBM PC specs...


8086 @8mhz, pseudo CGA with a real 640x200x16 mode, 512K RAM... can the "CGAmstrad" enable some tricks due to its specific built and "(bill) gate array" ?

I often feel sorry the PC1512/PC1640 didn't made it into a proper Demo-category...
they actually sold millions units are are somewhat still retro common sight.

I guess picture quality in 640x200x16 must be quite nice and smooth, was it ?

My EGA has issues with most vertical 200pixels modes as it stretched the native 350 suface into 200 so I had big dark scanlines... but on a real CGA monitor it must be quite smooth looking if well used.


I remember Might and Magic III : isles of terra could support EGA's 640x200x16 and it was really cool.


Also what about the 8087 Math Co-CPU ?