Hi Johnny, The fundamental issue Bill is seeing is a problem in the simh code and not the hardware or the host OS. There may be a hardware issue, but I doubt it and if there is, the simh issue will have to be addressed first.
- Mark On Monday, June 6, 2016 at 9:01 AM, Johnny Billquist wrote: > On 2016-06-06 17:44, William Wuttke wrote: > > Hi Mark, > > > > Looking at the sources, the latest date on most of the files is Dec 15, > > 2015. > > > > The serial port is actually 2 GPIO pins on the Broadcom SOC chip, levels > translated to RS-232 via a MAX3232. > > > > The Raspberry Pi is a model 1 B+. > > > > I looked at the sources online, and I saw the work done on the serial port > speed on the input side, but nothing on the output side. > > > > The deal is that unless you are using ancient hardware connected to > simh/PDP-8, you wouldn’t notice any problem. > > > > I wanted to post to this mailing list first to get some ideas before I > > create an > issue. > > Your problem is that the serial port on your raspberry is buffering for > you. Either in the hardware, or else in the device driver. > > The PDP-8 should not output data at the bps rate of the serial port. A > real machine don't do that. However, a real KL8E or KL8JA only have a > one character buffer. You need simh to simulate this then. but how to do > that might be very difficult, since this buffering is happening on the > hardware, or device driver in the OS for the serial port, and is not > something simh have real control over, or deep access to. > > Johnny > > -- > Johnny Billquist || "I'm on a bus > || on a psychedelic trip > email: [email protected] || Reading murder books > pdp is alive! || tryin' to stay hip" - B. Idol > _______________________________________________ > Simh mailing list > [email protected] > http://mailman.trailing-edge.com/mailman/listinfo/simh _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
