Re: [midatlanticretro] Acquired a PDP-8/E
>If you pull the front bezel you can see the switches. The normal problem is the
> Speaking of switches, the SW handle is completely broken, and 0, 1 and 2 of
> the address/data switches also are touchy. 0 feels as though it's busted and
> can be moved horizontally, and makes bad noises when switching up and down.
little plastic nubs are broken. You can repair that. 8/E switches are similar.
> Are replacement switches as hard to find as I'd think they'd be? I'dI saw some of the switches recently though they are normally ok. The handles
are harder. I have a few
reproduction handles left. They will not match your colors properly so any
switch handle you can fix your better of with that. If you have some that
are hopeless email me direct and we can discuss. Some people have painted
handles to match better.
> I'm really looking forward to hearing some "real music"! And no, I don'tYou could do that or since you have the controller you could use a
> have a PC04 or 05, unfortunately. I do have a Facit 4047 punch/reader, and
> since it's RS-232, I could potentially use that via the serial card. Are
> these high speed tape readers hard to find?
microcontroller to convert the parallel data from the controller to serial
for your 4047. The DEC ones aren't common and tend to be expensive when
they show up.
> I have several 8" floppy drives. A few are DSDD, and a few are SSSD, II have not heard of any controller that directly interfaced to them. Both
> think. What does it take to get one of these properly interfaced?
the DEC and DSD used controller boards in the drive unit and a funny serial
interface from the controller in the PDP-8 to the controller in the drive.
The DEC drives show up reasonably often. The controller doesn't show up that
- 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