... The 8V doesn t go to the backplane. Its the bulb power that connects directly to the front panel. I m not at my documentation but from memory the grey wireMessage 1 of 91 , May 21View SourceOn Tue, May 21, 2013 at 09:55:38AM -0500, Kyle Owen wrote:
> On Mon, May 20, 2013 at 11:24 AM, Dave McGuire <Mcguire@...>wrote:The 8V doesn't go to the backplane. Its the bulb power that connects directly
> I braved it and powered it on with all of the boards and such removed. I'm
> getting all of the voltages within 10%, but V2 on the board is measuring
> 4.96V or so, whereas 5V on the board is measuring 5.43V. Is V2 supposed to
> be another 5V line? I thought I remember seeing 8V on the fuse panel on the
to the front panel. I'm not at my documentation but from memory the grey
wire to the backplane is power good.
Your 5V is a little higher than I would expect. It will drop some under
loading. Also the contacts and 1/4" quick connects tend to get high
resistance. Either clean or wiggle them under load and if the voltage changes
give them more attention. The 5V fuse holder melting is also a known problem.
With your lightly loaded system it should be ok.
... OS/8 needs a random-access storage device; paper tape won t do it. Magnetic tape drives are *physically* sequential-access, of course, but the TU56 (forMessage 91 of 91 , Jun 6View SourceOn 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