15 Jul
2004
15 Jul
'04
11:05 a.m.
<Dave replies> I double checked the DIP switch
bank and it has only 8 DIP
switches. The DIP switche instructions are grouped into 3 sections, the
first with 4 switches, saying Text Color w/ Green Amber and Red, for the
first group. The second group says Text/Color and has only 2 switches.
The third group has the last 4 DIP switches and says "TTL Color" and each
This sounds as though it's mot just VGA, in fact it might not be VGA at
all. TTL is a digital 'standard' (TTL == Transistor Transistor Logic, the
famous 74xx series of ICs). VGA uses analogue signals for the 3 colour
drives. On the other hand, BNC connectors sound suspiciously like
analogue inputs to me.
You are sure that both the DE connectors have 15 pins. If one of them had
9 pins, that could certainly be a digital input.
Or maybe you do need a special cable, with both analogue and digial
signals on different pins of the same connector or something.
switch says something different. The first says the
number 8, the second
"16 SAT." and "16 PAS", the third "32". To me it
doesn't make sense. For
THis sounds like 3 bits (8 colours), 4 bits (16 colours, SATurated or
PAStel), or 5 bits (32 colours).
Several machiens used 3 or 4 bit digital colour outputs. I've never come
across a 5 bit output, though.
-tony