Any good simulation would have to include the semi-real I/O instructions RCC (Read and Chew Card) and DPD (Drop and Pie Deck).
I'm with you about never again struggling to remove a card from the read gate that had been converted to a mini-accordion or measuring the size of a progrram in boxes, not bytes. I'm traveling for several weeks, but when back home I will assist Ken in getting an SDS driver for the reader/punch if he hasn't completed the task by then. All needed documentation is in the 940 Reference Manual. I wonder if anyone has sound recordings of a reader/punch? That would be a nice addition to a blinkenlights implementation, which is on my To Do list. Mark Get BlueMail for Android On Feb 13, 2020, 6:51 AM, at 6:51 AM, Bob Supnik <[email protected]> wrote: >1. I can confirm that RT11 V5.3 INIT does not work properly with an >RL02 >in 3.10. > >My next step is to trace back changes, because I think it used to work. > >2. There's no card reader for the SDS 940 because > >a) I hate card readers (from having used them way back when) >b) I thought there wouldn't be any demand > >Rich Cornwell's library should make it easier to implement a card >reader >these days. > >My first card reader story goes back to an RCA Spectra 70 I used in >1965. >It had a vacuum pick reader for high speed operation. The reader would >gradually curl the front edge of the cards, so that after two or three >passes, the deck was unreadable. It's failure mode was to spit cards >out, >past the receive hopper, at very high velocity and scatter them ten or >fifteen feet out on the floor... > >The second was a very slow mechanical reader on a PDP-7 in 1966. The >only other keyboard device was a Teletype, so initial entry of programs >was done from punched cards. It read, allegedly, 100 cards per minute >using mechanical fingers with little star wheels on the end. DEC field >service was in almost every week tuning or fixing the damned thing so >that it could actually handle a decent-sized deck. > >In my experience, only IBM built decent card readers. The reader/punch >on the 1620 (I used one in 1964) was very sturdy, and the 407 (used for >offline printing of punched card output) could read almost anything. > >/Bob > > >_______________________________________________ >Simh mailing list >[email protected] >http://mailman.trailing-edge.com/mailman/listinfo/simh
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