13 Mar
2001
13 Mar
'01
2:31 p.m.
I got my PDP11/53, but I can't get it to do anything. I loaded
Tera-Term on my IBM Model 80, to use as my terminal. I dug out a serial
cable, and bought a gender changer to hook the two computers up. What
could I be doing wrong... I am not getting anything! I see lights on
the cards, but nothing on the screen.
Chad Fernandez
Michigan, USA
14 Mar
14 Mar
11:32 a.m.
Chad Fernandez writes:
I got my PDP11/53, but I can't get it to do
anything. I loaded
Tera-Term on my IBM Model 80, to use as my terminal. I dug out a serial
cable, and bought a gender changer to hook the two computers up. What
could I be doing wrong... I am not getting anything! I see lights on
the cards, but nothing on the screen.
Sorry - I'm not a PDP11 person, but...
since you say you're using a serial cable, maybe you need a null-modem
adapter too?
Cheers,
Andy
2:34 p.m.
Chad Fernandez writes:
One thing -- I don't know about the 11/53 -- but most DEC DL11-W console
serial ports don't give you the modem control signals you need for
the PC (CTS<->RTS) (DTR->DSR-DCD).
You probably need a null modem cable or adapter with CTS-RTS jumpered
at the PC and DTR going to DSR and DCD (both ways).
--Bill
--
bpechter(a)monmouth.com | FreeBSD since 1.0.2, Linux since 0.99.10
Brainbench MVP | Unix Sys Admin since Sys V/BSD 4.2
Unix Sys.Admin. | Windows System Administration: "Magical Misery Tour"
I got my PDP11/53, but I can't get it to do
anything. I loaded
Tera-Term on my IBM Model 80, to use as my terminal. I dug out a serial
cable, and bought a gender changer to hook the two computers up. What
could I be doing wrong... I am not getting anything! I see lights on
the cards, but nothing on the screen.
Sorry - I'm not a PDP11 person, but...
since you say you're using a serial cable, maybe you need a null-modem
adapter too?
Cheers,
Andy
18 Mar
18 Mar
11:07 a.m.
Bill,
Your last line speaking of CTS-RTS ,DTR, DSR, and DCD..... is that what
the null modem cable does, or is that in addition to the null cable?
Chad Fernandez, who is learning he knows quite a bit less about
computers than he thought he did :-)
Michigan, USA
Bill Pechter wrote:
One thing -- I don't know about the 11/53 -- but
most DEC DL11-W console
serial ports don't give you the modem control signals you need for
the PC (CTS<->RTS) (DTR->DSR-DCD).
You probably need a null modem cable or adapter with CTS-RTS jumpered
at the PC and DTR going to DSR and DCD (both ways).
--Bill
11:21 a.m.
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11:43 a.m.
Bill,
Your last line speaking of CTS-RTS ,DTR, DSR, and DCD..... is that what
the null modem cable does, or is that in addition to the null cable?
That depends on who made the null modem and what they were trying to
hook up. Some computers just use Transmit (tx), Receive (rx),
and signal ground (pins 2, 3 and 7 on the RS232 DB25... some
use handshaking signals to allow data out the serial port (mainly for
modem flow control.
Chad Fernandez, who is learning he knows quite a bit less about
computers than he thought he did :-)
Michigan, USA
Bill Pechter wrote:
--
bpechter(a)monmouth.com | FreeBSD since 1.0.2, Linux since 0.99.10
Brainbench MVP | Unix Sys Admin since Sys V/BSD 4.2
Unix Sys.Admin. | Windows System Administration: "Magical Misery Tour"
One thing -- I don't know about the 11/53 --
but most DEC DL11-W console
serial ports don't give you the modem control signals you need for
the PC (CTS<->RTS) (DTR->DSR-DCD).
You probably need a null modem cable or adapter with CTS-RTS jumpered
at the PC and DTR going to DSR and DCD (both ways).
--Bill
8528
days inactive
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5 comments
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participants (4)
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ahm＠spies.com -
ard＠p850ug1.demon.co.uk -
fernande＠internet1.net -
pechter＠pechter.dyndns.org