12 Jul
2005
12 Jul
'05
11:04 p.m.
From: "Stefan" <birs23 at
zeelandnet.nl>
I just hooked up my Teleprint 390 to my laptop and it works like a
charm, almost 100%. I can type on my laptop and the output appears on
both the papertape as typed. And what I type on the Teleprint appears
on my laptop but what it doesn't do is when I feed it a papertape
output it on the laptop (only parts). It does output it correctly on
the Teleprint itself. Any idea's what might be wrong here ?
I am not a real technical person but willing to give anything a try :-)
Stefan.
Hi
Some computers are especially slow at doing a linefeed to
the screen. I'd think it could keep up with 110 Baud though.
Most teletypes have some way for a signal from the computer
to throttle the paper tape read ( as I recall ). You might
look at connecting some handshake.
You didn't state if it was making mistakes from the first
character or if it read several right and then lost it.
If it read some right, how long does it go before it
makes mistakes? Any line feeds involved?
Dwight
13 Jul
13 Jul
7:18 p.m.
----- Original Message -----
From: "Dwight K. Elvey" <dwight.elvey at amd.com>
To: <cctalk at classiccmp.org>
Sent: Wednesday, July 13, 2005 12:04 AM
Subject: Re: Teleprint 390
My 11/45 has a seperate "Paper Tape Advance" output on the console serial
interface, whic is set by writing to a register - I assume that the
Teleprint 390 / ASR33 has either a solenoid drive or a clutch that allows
the tape to advance one character at a time, under processor control.
Jim.
From:
"Stefan" <birs23 at zeelandnet.nl>
I just hooked up my Teleprint 390 to my laptop and it works like a
charm, almost 100%. I can type on my laptop and the output appears on
both the papertape as typed. And what I type on the Teleprint appears
on my laptop but what it doesn't do is when I feed it a papertape
output it on the laptop (only parts). It does output it correctly on
the Teleprint itself. Any idea's what might be wrong here ?
I am not a real technical person but willing to give anything a try :-)
Stefan.
Hi
Some computers are especially slow at doing a linefeed to
the screen. I'd think it could keep up with 110 Baud though.
Most teletypes have some way for a signal from the computer
to throttle the paper tape read ( as I recall ). You might
look at connecting some handshake.
You didn't state if it was making mistakes from the first
character or if it read several right and then lost it.
If it read some right, how long does it go before it
makes mistakes? Any line feeds involved?
Dwight
7:30 p.m.
>>>> "Jim" == Jim Beacon <jim
at g1jbg.co.uk> writes:
Jim> My 11/45 has a seperate "Paper Tape Advance" output on the
Jim> console serial interface, whic is set by writing to a register -
Jim> I assume that the Teleprint 390 / ASR33 has either a solenoid
Jim> drive or a clutch that allows the tape to advance one character
Jim> at a time, under processor control.
Bit 0 in the receive control register, right? That's supposed to be
the papertape reader "reader run" signal. It isn't used as a one
character at a time thing; it is read/write and if set remains set
until explicitly cleared.
The idea is that the system would accept interactive input by leaving
this bit clear, but then when you told it to read a papertape it would
set the bit. That starts the tape. The program would then see
characters streaming in. At some point (perhaps when it sees a string
of nulls, or when it knows the tape is finished by some internal
coding) it would clear reader run again.
I don't know if this actually was used much. The ASR33s I remember
rarely if ever had this hooked up; the reader run control was done by
flipping the papertape reader switch on the machine.
I tried to find some code for it, but RSTS dropped the code in V9.6
and that's the oldest I have...
paul
10:16 p.m.
----- Original Message -----
From: "Paul Koning" <pkoning at equallogic.com>
To: <cctalk at classiccmp.org>
Sent: Wednesday, July 13, 2005 8:30 PM
Subject: Re: Teleprint 390
Paul,
thanks for clearing that up - I guess I mis-read the manual.
Jim
>>>> "Jim" == Jim Beacon <jim at g1jbg.co.uk> writes:
Jim> My 11/45 has a seperate "Paper Tape Advance" output on the
Jim> console serial interface, whic is set by writing to a register -
Jim> I assume that the Teleprint 390 / ASR33 has either a solenoid
Jim> drive or a clutch that allows the tape to advance one character
Jim> at a time, under processor control.
Bit 0 in the receive control register, right? That's supposed to be
the papertape reader "reader run" signal. It isn't used as a one
character at a time thing; it is read/write and if set remains set
until explicitly cleared.
The idea is that the system would accept interactive input by leaving
this bit clear, but then when you told it to read a papertape it would
set the bit. That starts the tape. The program would then see
characters streaming in. At some point (perhaps when it sees a string
of nulls, or when it knows the tape is finished by some internal
coding) it would clear reader run again.
I don't know if this actually was used much. The ASR33s I remember
rarely if ever had this hooked up; the reader run control was done by
flipping the papertape reader switch on the machine.
I tried to find some code for it, but RSTS dropped the code in V9.6
and that's the oldest I have...
paul
11:41 p.m.
>>>> "Jim" == Jim Beacon
<jim at g1jbg.co.uk> writes:
Jim> My 11/45 has a seperate "Paper Tape Advance" output on the
Jim> console serial interface, whic is set by writing to a register -
Jim> I assume that the Teleprint 390 / ASR33 has either a solenoid
Jim> drive or a clutch that allows the tape to advance one character
Jim> at a time, under processor control.
Bit 0 in the receive control register, right? That's supposed to be
the papertape reader "reader run" signal. It isn't used as a one
character at a time thing; it is read/write and if set remains set
until explicitly cleared.
The idea is that the system would accept interactive input by leaving
this bit clear, but then when you told it to read a papertape it would
set the bit. That starts the tape. The program would then see
characters streaming in. At some point (perhaps when it sees a string
of nulls, or when it knows the tape is finished by some internal
coding) it would clear reader run again.
I don't know if this actually was used much. The ASR33s I remember
rarely if ever had this hooked up; the reader run control was done by
flipping the papertape reader switch on the machine.
The reader run relay is not a standard Teletype fitment. It was a DEC
modification, Intel and others had similar modifications too (and
amazingly they werre all much the same). I believe, though, the Data
Dynamics 390 has a reader control relay as part of the call control unit
(which as I said is very different from the Teletype one).
-tony
7122
days inactive
7123
days old
4 comments
4 participants
participants (4)
-
ard＠p850ug1.demon.co.uk -
dwight.elvey＠amd.com -
jim＠g1jbg.co.uk -
pkoning＠equallogic.com