"moroless" Firstly, CGA is RGBI (digital RGB, with R, G, B and I for Intensity. But there is a small difference in color 6 https://en.wikipedia.org/wiki/Color_Graphics_Adapter (see "Color Pallete")
- Arcade graphics are analog RGB in TV resolution (480i, 15.750KHz horizontal, 60Hz vertical) - CGA is **never** analog. - Lots of old computers use RGBI (digital RGB). From my head: BBC mod. B, Sinclair Spectrum +2/+3, Commodore 128, Amiga (yes, it outputs digital AND analog RGB) - There is no such thing as a CGA board with analog outputs. 2016-05-17 17:05 GMT-03:00 Eric Christopherson <[email protected]>: > On Tue, May 17, 2016 at 2:58 PM, Ian Finder <[email protected]> wrote: > > > I was under the impression it was the same as analog RGB, but for shitty > > cards that don't USE the analog-ness of the RGB standard, and just have > two > > state- 0 directly to _MAX in "analog value" > > > > Yes. It's TTL level. Since posing my question, I've gotten a tiny bit more > educated: > 1. Some sites talk about e.g. arcade graphics as being "analog CGA" -- I > was acquainted with these being called "analog RGB" but never saw "analog" > and "CGA" together before. > 2. There are computers knocking about with actual digital RGB signals, like > the BBC Micro B (IIRC). What I forgot to make explicit in my question was > that I was asking about RGBI (+intensity), which AIUI is the same as CGA. > > Now, I'm confused about point 1: did actual PCs with CGA have both digital > (TTL) and analog signaling? > > > > > > On Tue, May 17, 2016 at 12:55 PM, Paul Koning <[email protected]> > > wrote: > > > > > > > > > On May 17, 2016, at 3:30 PM, Eric Christopherson < > > > [email protected]> wrote: > > > > > > > > ... > > > > Do either the 2001 or 2007 support *digital* RGB/CGA out of the box? > > > > > > What is "digital RGB"? I know RGB as a trio of analog signals. HDMI > is > > > digital, as is DVI; did you mean those? > > > > > > paul > > > > > > > > > > > > > > > -- > > Ian Finder > > (206) 395-MIPS > > [email protected] > > > > > > -- > Eric Christopherson >
