Re: Arcade board

[et472@FreeNet.Carleton.CA (Michael Black)]

"Bill Garber" (willy46pa@comcast DOT net) writes:
> "Michael J. Mahon" <mjmahon@aol.com> wrote in message
> 20040814033629.04913.00001694@mb-m05.aol.com">news:20040814033629.04913.00001694@mb-m05.aol.com...
> : Steven N. Hirsch wrote:
> :
> : >Michael J. Mahon wrote:
> : >
> : >> I had my eye on it for almost a week.  An interesting combo
> : >> of 9918 sprite card and AY-3-8910 sound chip.
> : >>
> : >> Also interesting that they didn't find a way to route the
> video
> : >> output on the PC board.  ;-)
> : >
> : >I missed the run-up to this.  A friend of mine who I have not
> seen in
> : >years designed a board called the "Sprite-n-Stereo" card. Is
> that what
> : >you have?  If so, quite a rarity.
> :
> : It's pretty close!  There is one AY-3-8910, so it's a
> "Sprite-n-Mono"
> : card.  ;-)  I note from the picture, though, that there's some
> 2-channel
> : funny business at the audio end, so maybe it _is_ stereo...that
> would
> : mean that the video is available only at the RF modulator
> connector.
> :
> : I've never seen this combo before, and am looking forward to
> seeing
> : how the 9918A and the '8910 are interfaced, since there's
> nothing
> : but "glue" logic on the card.
> 
> This last phrase is Bogus. It's best known as GLU or General
> Logic Unit.
> The TTL chips on the card are the Logic. The CFFA has GLU in the
> form of
> a CPLD. Most earlier Apple IF cards have individual gates making
> up their
> Logic so they don't have GLU.
> 
> Thank you. We now return you to your previously scheduled topic.
> :o)
> 
Huh?  "Glue" has been a common term, for a long time, for the bits
of logic needed to fit things together.  You can have a real fancy IC,
but be unable to connect it to a CPU bus because it needs some
other things, and that's the glue.  Anything more integrated derives
from this common terminology.

   Michael