29 Oct
1999
29 Oct
'99
12:18 p.m.
On Fri, 29 Oct 1999, Tony Duell wrote:
Thanks, that does help things for me. I remember how to Save/restore set
the serial ports (non-printer) it was always those Little bit mapped
registers that always got me lost.
Ok, now how does one Discard the Horizontal and
Vertical Sync
pulses from a video signal? before feeding to the Input?
Does the Vt100 have built in logic to do that
or was that a seperate adaptor from DEC?
Has anyone tried it with COLOR Composite Inputs? Remember what I
was thinkinf of using it for. what about the Chrominance signal? or do I
need to strip that in addition to the native sync pulses?
Probally for the reason you mentioned. it was Supposed to act as a
true VT102 (Vt100 sucessor). But under CP/M 86/80 the keys are usable in
some terminal programs Modem 7 for example WILL send them to my Linux
system, whose terminfo for the Vt102 Will use them. Withnout having to go
through that Ugly Terminfo stuff. does anyone have a list of the ansi
codes that are sent by them?
A pearl of wisdom from the y2K newsgroups:
-------------------------------------------------------------------------
Y2K appears to be the Baby Boomers mid-life crisis, and it has the
potential to be a dandy.
-- Anonymnous --
--------------------------------------------------------------------------
B'ichela
some extra video RAM, etc. It allows you to have 24
rows of 132
characters, extra text attributes, etc.
Unless it's faulty, leave it in place. It can do no harm, and in general
it makes the VT100 work like most modern programs expect a VT100 to
behave.
Ok, thanks for explaining what that REALLY does. I always had wondered
what was the AVO's job.
I believe the STP _is_ the VT180 processor.
AH-Ha! Ok now things are a little less cryptic especially since the
When Requesting a DSR to the Terminal it says it is a Vt100 with AVO and
STP. (ESC [?1;3c)
I am going to guess a bit here. My guess is that the STP connects to a
paddleboard that goes into the edge connector on the VT100 logic board.
This is a very clever piece of DEC design -- the contacts on this edge
connector are designed to touch if there's no PCB inserts. By so doing
they connect the VT100 logic to the RS232 connector on the back. By
inserting a PCB you can intercept this connection, allowing the VT100
terminal to talk to the STP and also the STP to talk to the host via the
RS232 connector.
A second guess is that if you remove the PCB from this edge connector,
the thing goes back to being a normal VT100.
I'm going to give it a try. AT
least until I get that boot disk
and cable. Because right now when I turn it on it tells me that I have a
boot floppy error (Of Course I do, I don't have a drive cable or a disk as
of yet.)
think it could drive a Tekky 4000 (since most things
can...), but I doubt
if it can do the VT105.
No idea where you get either of these boards, either...
I would think.... Someone
on this list might have some of those
boards hiding in their parts bins.
From the left :
Block 1:
Scroll (0=jump, 1=smooth)
Autorepeat (0=off, 1=on)
Screen (0=dark background, 1=light background)
Cursor (0=underline, 1=block)
Block 2:
Margin bell (0=off, 1=on)
Keyclick (0=off, 1=on)
Emulation (0=VT52, 1=ANSI)
Auto Xon/Xoff (0=off, 1=on)
Block 3:
Shifted-3 (0=#, 1=\pounds)
Wrap around (0=off, 1=on)
New line (0=off, 1=on)
Interlace (0=off,1=on)
Block 4:
Parity (0=odd, 1=even)
Parity (0=off, 1=on)
Bits/Char (0=7bits, 1=8bits)
Power (0=60Hz, 1=50Hz)
8. Since it has Composite In and Composite out.
Does it have a
built in genlock allowing me to at least use the Vt100 to do titling
and captions; then sending the output to a second Video Recording
unit. if titleing is not possible, what is Composite video IN for??
There is no genlock, the VT100 has to be the sync generator.
Composite out is what you expect -- a composite feed to an external
monitor, etc.
Composite in is strange. You first have to extract the sync from the
composite out socket, and lock an external video source to that. You can
then feed the output of that video source into the composite in socket,
where it will be displayed on the VT100 screen, overlayed with the text
from the VT100 itself. But notice the external source is synced to the
VT100 and not the reverse. While we are on the issue of DEC stuff. Who has
the full list
of the Control Codes for the Rainbow 100's terminal mode? How come
when I fire up CP/M Modem7 or 8? I can use the Previous Screen/Next
Screen keys and yet in the ROM Vt100 emulation Neither key works? Is
PResumably the Modem7 program is rather more user-friendlt than the one
in ROM... Next/Prev screen were not VT100 features, AFAIK, so I guess DEC
didn't see any need to make them work with the built-in VT100 emulator.
-tony