PDP-11/05 restoration project - anyone has a M7810 or M781?

js at cimmeri.com js at cimmeri.com
Sun Sep 27 15:37:51 CDT 2015

On 9/27/2015 2:56 PM, tony duell wrote:
>> The plan is to get it to work with the 8kW core memory, M7800 connected to
>> a good old teletype and PC05 paper-tape reader / punch and then run paper
>> tape BASIC on it or other paper tape software.
>> The problem is that I am lacking in the M7810 board. Since I do have a M105
>> and M7821 a M781 could do as well.
> Why do you need a second serial port? The PDP11/05 CPU board set has a built-in
> UART set to the console port address. In general it was set to be 110 baud, and
> has a current loop interface, but that's just what you need for a teletype.
> -tony

Curious: what if the built in one were 
faulty, or if you wanted to use rs-232 
instead of current loop?

- John

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