larsbrinkhoff

It should be in the description for the byte instructions: LDB, DPB, IBP, and ILDB. http://bitsavers.org/pdf/dec/pdp10/1970_PDP-10_Ref/

Basically, loading a 0-bit byte from memory gets you a 0. Depositing a 0-bit byte will not alter memory, but may do an ineffective read-modify-write cycle. Incrementing a 0-bit byte pointer will leave it unchanged.

1979 is quite recent as computer history goes, and many conventions had settled by then. The Wikipedia article discusses the etymology of "byte" and how the definition evolved from loosely "a group of bits less than a word" to "precisely 8 bits". https://en.wikipedia.org/wiki/Byte

B was developed on the PDP-7. C was developed on the PDP-11.

PDP-10 byte size is not fixed. Bytes can be 0 to 36 bits wide. (Sure, 0 is not very useful; still legal.)

I don't think there is a C++ compiler for the PDP-10. One of the C compiler does have a 36-bit char type.

ITS, Maclisp, Emacs, and TECO were not gone in 1982. But admittedly on their way out.

At least a little something is being done: https://icm.museum/

Mode ∞: shell mode in Emacs.

Just chipping in that an early CLU compiler for the PDP-10 has been recovered from backup tapes, and can be run on an emulator.

https://github.com/get-a-clu/

https://www.youtube.com/watch?v=6PF9jbzncgM

If you're going to make flip chips, let me know.

No dedicated stack pointer isn't much of a problem. Stack growing up might be.

For that matter is a KL a "real" PDP-10?

Also F11 and, not least, J11.

It will run WAITS, but the disk images that are available are not top notch: http://sky-visions.com/dec/waits/ Bruce Baumgart is the keeper of the SAIL backup archives. I'm poking him occasionally to do something about this. I'd say an image with e.g. TeX would be imperative.

Rich and I added support for III and DD displays, so you can edit with E in style.

Tradition has it that the thing to do with Forth is implement your own toy and then call it a day. Usually not having learned how to actually program in Forth. Yes I'm bitter.

Also, it was ported (rewritten) to a PDP-7.

No a 3B2, which is different.

Also straight from the source:

https://pidp.net/pidp10.html

FAQ: 1. Yes, the date is real. 2. No, there will be no video recording.

Oscar Vermeulen asked me to post this, so consider the PiDP-10 officially released. 50 kits are going out to beta testers. A demo will be presented at MIT Museum on April 1.

They are also looking into ARPANET and Chaosnet.

An archive of Mills' Fuzzball operating system for PDP-11 computers. Its main application was as a router in NSFnet.

You can run MDL Zork with a interpreter called Confusion.

Probably this, right? https://adl.sourceforge.net/ddldoc.html

Do you still have that code?

To clarify, "Mainframe Zork" usually means the original MDL version for the PDP-10, Bob Supnik's Fortran translation thereof, or the C translation of the Fortran version. The other, "not mainframe" Zork, is Infocom's Zork series written in ZIL and running on microcomputers.

Previously: https://news.ycombinator.com/item?id=23108626

An older chess TUI: https://github.com/PDP-10/its/issues/1024#issuecomment-40025...

Scheme also isn't the intersection of all Lisps. I take union/intersection comment as a quip, not to be read literally.

The Fortran version wasn't written at MIT.

Put me on the mailing list!

alt.sys.pdp10 is where it's at.