Re: [midatlanticretro] Acquired a PDP-8/E
- On Mon, 3 Jun 2013, Kyle Owen wrote:
>I doubt this...but have you cleaned all contacts and pins?
> On Wed, May 22, 2013 at 8:55 PM, David Gesswein <djg@...> wrote:
> The first are simple instruction tests. The console print test and echo
> test are good for checking out your console serial port. The visisble
> increment AC test is what it says. The shifting lights will be a good first
> program for learning the PDP-8 instruction set.
> After I get the toggle in and console working then I toggle in RIM, load
> over the console serial BIN, then run the 8/E maindecs, then run focal/basic
> etc. To load basic or focal programs (not the bin tape) over the console
> you will need to either convert reader run to RS-232 flow control or use a
> program that can put pauses at end of line etc.
> I got my new bulbs Friday! I ordered 50 (for ~$27 shipped from Mouser) of the 12V high brightness type, and they look perfect. I replaced all of the bulbs with
> these, just to make sure they'd match.
> As you suggested, I made the shifting lights program by hand compiling it as a first learning experience of the instruction set. Here's a
> video: http://www.youtube.com/watch?v=LZ9H1vqdIDM
> Next step: get my serial interface card going. Were there any common failures on the M8650? Mine just puts out a few random characters to the terminal every few
> seconds when the computer is on. Turned off, there's nothing coming in, so I doubt it's a high noise problem on my cables. I'm just using a few feet of Cat 5.
http://gewt.net/ Personal stuff
- On 06/06/2013 12:54 PM, Kyle Owen wrote:
> That looks like a nice product, but yes, it's certainly expensive. I've gotOS/8 needs a random-access storage device; paper tape won't do it.
> some FPGA background myself, along with several different microcontrollers,
> so I may see about creating something that will work with my high-speed paper
> tape interface. That could be considered an OS/8 storage device, yes?
Magnetic tape drives are *physically* sequential-access, of course, but the
TU56 (for example) is logically a random-access, block-oriented device. (with
highly variable latency ;))
> I wouldIf this was a generally-directed question...The book you want for "most
> have no idea how to go about writing a driver for it yet, but perhaps it'd be
> in my best interest to start reading up on the commands for the card and then
> learn more about OS/8. Do you have any suggestions on recommended reading for
things OS/8" is the "OS/8 Handbook". It is excellent. Try to find a paper
copy if you can, but it's available in PDF on bitsavers:
Dave McGuire, AK4HZ
New Kensington, PA