Re: Arcade board

[ralfe.cookson@trw.com (Ralfe Cookson)]

mjmahon@aol.com (Michael J. Mahon) wrote in message 

> Yes, this is the Third Millenium Engineering Arcade Card.
> 
> If you have more info about the card, or its software, I would be very
> interested.  It has two RCA connectors.  I assumed one was audio
> and one was video, but that appears to be incorrect.

I can dig up some more info, but it may be a few days. But the two RCA
connectors were composite video and mono audio. They should work when
plugged into a TV with RCA video and sound inputs. Which connector is
which I do not remember, but you can probably trace the one connected
to the video output transistor (2N3904) from the VDP chip. The PSG I
believe used 741 op amps for audio.

There was software that came with the card as well as a manual of
sorts. There was also an extension to Applesoft BASIC, using &, that
allowed to program the main features of the VDP and PSG in BASIC.

> It also has a "flying lead" with a single-pin connector on the end, which
> I took to be a video coax, but it isn't.  What is this and what does it
> connect to?

The single wire plugged into the Apple's RCA video connector so that
the video from the card could be Apple video in pass-thru mode, or the
VDP video, if it was enabled.

> There is also a 4-pin Molex connector like the Apple II modulator
> connector.  Is this the only video output?  Are the two RCA's audio
> outputs?  ???

The 4 pin connector was for RF modulator. 

> I haven't started to dig into it yet, so if anyone has any information
> on this card, I would be delighted to hear more.  ;-)
> 
> I was surprised that the '8910 was interfaced without benefit of latches,
> so your remark about marginal interface to the Apple bus sounds
> right.  Did it work OK, or were there intermittent glitches?

> -michael
> 
> Check out parallel computing for 8-bit Apples on my
> Home page:  http://members.aol.com/MJMahon/