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  1. Michael Robinson

    "Listening" to the PDP-11

    I've often thought about the experiential difference between running emulators and "actual" hardware. Surely the emulator is easier to configure and can give more debugging information, but the actual machine has "presence". Right? It's big, makes noise, keeps my basement warm during the...
  2. Michael Robinson

    SITS once again runs on PDP-11/45

    Greetings! I'd like to announce a project to restore the MIT Small Incompatible Timesharing System (SITS), which is a port (of sorts) to the PDP-11 of the venerable ITS for PDP-10. Historically, SITS was the development platform for the original MIT LOGO environment. You can read some history...
  3. Michael Robinson

    Booting from units other than 0 on Emulex UCxx devices

    Greetings! I have a PDP-11/23 and PDP-11/34 both running RT-11. Both machines have Emulex SCSI controllers (a QBUS UC07 and UNIBUS UC18 respectively) that are connected to SCSI2SD drives. The SCSI2SD drives each emulate four units, which are visible to RT-11 as DU0: through DU3:. I have an...
  4. Michael Robinson

    Unibone as a PDP-11 live memory monitor

    Greetings! I have been enjoying using Joerg Hoppe's Unibone on my PDP-11/45 for a few years now. If you have a Unibus PDP-11, I highly recommend getting one! It occurred to me last week that I ought to be able to use the Unibone to snapshot the entire PDP-11 memory. To my delight Joerg's...
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