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- Newsgroups: alt.sys.pdp8
- Path: sparky!uunet!think.com!rpi!newsserver.pixel.kodak.com!laidbak!jeq
- From: jeq@i88.isc.com (Jonathan E. Quist)
- Subject: Re: The good old days.
- Message-ID: <1992Nov19.153247.13348@i88.isc.com>
- Sender: usenet@i88.isc.com (Usenet News)
- Nntp-Posting-Host: birdie.i88.isc.com
- Organization: INTERACTIVE Systems Corporation, Naperville, IL
- References: <1992Nov18.235407.12864@reed.edu> <1992Nov19.102634.20745@vpnet.chi.il.us>
- Date: Thu, 19 Nov 1992 15:32:47 GMT
- Lines: 19
-
- In article <1992Nov19.102634.20745@vpnet.chi.il.us> cgordon@vpnet.chi.il.us (gordon hlavenka) writes:
- >Another interesting pdp8 trick: Since we had (4) ASR-33s as our only
- >IO, we wrote a "fourple loader" which would read a clunk from each TTY
- >in turn. (The first character was on tape 1, the second on tape 2,
- >etc.) This ended up being almost 4 times as fast as loading
- >through 1 TTY, since most of the time was spent just waiting for the
- >reader to come ready again. Each TTY used a tape with a different
- >leader character, and the loader would figure out which tape was in
- >which TTY. Nowadays I think they call this "reverse multiplexing."
-
- I love it! Paper tape striping!
-
- Jeez - if you could add enough serial ports, you could attempt paper
- tape virtual memory..... nah.
- --
- Jonathan E. Quist INTERACTIVE Systems Corporation
- jeq@i88.isc.com '71 CL450-K4 "Gleep", DoD #094 Naperville, IL
- There are many things a person should experience in a lifetime.
- Among them are an infant's first cry, and an infant's first laugh.
-