BBN-1D / BBN-1D/LOGO

PDP-1D

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#1 6 comments 0 reactions 1 assignee Claimed by @PashPaw View on GitHub
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Description

Looking over the source code, it does appear to run on the PDP-1D. Page 38 has a syllable that uses the LAI instruction:

```
COLON IF JSP GNS /"TRUE" OR "FALSE"
...
LAI
...

```

LAI only appears on the PDP-1D. It is not a part of the "standard" PDP-1 (read: A-C) instruction set. All surviving documentation mentions that it ran on a system that supported remote terminals. Report 1889, from 1969, also mentions the use of the Teletype extensively and that _Logo: A Final History_ confirms that these experiments were on a PDP-1.

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