Loading...

Special, unique DEC PDP-11/23, ( 1983-88 ) has been restored

10,261 views

Loading...

Loading...

Transcript

The interactive transcript could not be loaded.

Loading...

Loading...

Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Uploaded on Nov 16, 2008

Video #3: Restored DEC PDP-11/23, 1983-1988. The purpose of this system was software development running under RT-11, for example: DCJ-11 based Single Board Computer, see my video #1. It is a very special, rare and unique design based on a Q_BUS/CTI-BUS converter. A lucky change was the reason to get a RD50,= 5Myte hard disk with attached controller board. I designed this Bus-Converter, wrote the the boot code, the format und (scope-loop) test programs and at least a RT-11 device driver. ( RH.MAC ). I was very surprised that my design as well the RD50 hard disk is still running without any problems after more than 20 years. The only big problem I got was the power supply with only 20 min uptime. I was able to replace via a standard PC 350W power supply ... but with a lot of barriers. All details, you will find in the video.
The only remaining problem is the RX02 environment. I think, the problem is most likely related to these more than 20 years old floppy media. On the other site, I always get Hard Errors reflecting to a broken floppy drive or a faulty logic. Read operation works fine but any write operation results in a unusable Floppy media .I only have 5 remaining RX02 floppy media. Can anyone help me? I need one good RX02 media to verify where the problem comes from. Please contact me:
Reinhard.Heuberger@gmx.de

Loading...

When autoplay is enabled, a suggested video will automatically play next.

Up next


to add this to Watch Later

Add to

Loading playlists...