PDP11/04 DL11 Console Emulator woes..

From: John Honniball <coredump_at_gifford.co.uk>
Date: Tue May 25 14:42:58 2004

wai-sun chia wrote:
> The console device is a DL11-W/M7856 which came with a 20mA
> (orginal console was a TTY), which I don't have. BTW, the bootstrap
> device is M7312. Therefore, I proceeded to make my own EIA cable
> from the DL11 manual so that I can use my VT320. I made a standard
> null modem configuration (BERG-DB25F) and made the necessary
> 9600/8N1 jumper changes to the DL11-W...

But you only receive the PDP-11's output, and your input gets lost?

Have you made sure you added the link to the Berg connector that
links the TTL-level serial data from the EIA receiver to the UART?
The UART feeds output data to both the EIA and current-loop output
drivers, but it need the link to select which of the two interfaces
is active for received data.

Sorry, I did this on a friend's PDP-11 and I don't have the print set
in front of me to give you the pin numbers.

John Honniball
Received on Tue May 25 2004 - 14:42:58 BST

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