PDP8E 3.75V on Omnibus issue
Hey everyone, thanks for always serving as a great sounding board and source of advice! I have an issue with a PDP8E which has an issue with the power supply. The -15V, 15V, and 5V are good, and my Bus Loads board is good, but for some reason the power supply is bringing down the 3.75V signal from the bus loads to 0V (this is the DC VOLTS OK grey wire from the power supply). I'm having troubles finding the schematics of the PDP8e power supply, also any suggestions on what could be pulling the 3.75V to 0V (tested multiple Omnibus backplanes, and bus load boards, so I'm fairly certain it's the PSU). All help is MUCH appreciated, thanks!
Re: VMS 8.4 Alpha Hobbyist disk images
On 2018-02-06 07:37, Douglas Taylor via cctech wrote: On 2/1/2018 12:55 PM, Douglas Taylor via cctech wrote: I'm getting an Alphaserver 1000a and wanted to install VMS 8.4 - hobbyist license from CD. So, I went to the folder on my PC where I have the 8.4 hobbyist distribution. There are 3 ISO files; ALPHA084, ALPHA084LP1 and ALPHA084LP2. I thought I would burn these to CD and up and away. However, Windows 7 balks and says, 'The selected disc image file isn't valid'. Is it Windows 7 or is there something I'm missing? Is the CD on the Alphaserver 2048 byte block size or 512? Doug Progress: I was able to burn the hobbyist Alpha OpenVMS ISO images to CD using linux. Debian Liunx - you have to install cdrskin and the command I used was $ cdrskin --devices -data ALPHA084.ISO This is on a DELL desktop with one CD/DVD drive, instead of --devices I could have used dev=/dev/sr0. I was able to mount and explore these CD's on the Alphaserver 1000a. Doug Congrats on the new system. I know I've done this with Toast on my Mac, and I think I've done with Nero on the PC. I've also used one of those programs to make CD's for my PDP-11's, including install CD's for RSX-11M+ and RT-11. I didn't manage a RSTS/E install CD. I'm using an interesting option on my VMS Cluster. I have simh/VAX sharing out two different ConDists to my VMS cluster. Though I need to burn an 8.4 CD, as I'm still at 8.3 on my Alpha. Zane
Re: VMS 8.4 Alpha Hobbyist disk images
On 2/1/2018 12:55 PM, Douglas Taylor via cctech wrote: I'm getting an Alphaserver 1000a and wanted to install VMS 8.4 - hobbyist license from CD. So, I went to the folder on my PC where I have the 8.4 hobbyist distribution. There are 3 ISO files; ALPHA084, ALPHA084LP1 and ALPHA084LP2. I thought I would burn these to CD and up and away. However, Windows 7 balks and says, 'The selected disc image file isn't valid'. Is it Windows 7 or is there something I'm missing? Is the CD on the Alphaserver 2048 byte block size or 512? Doug Progress: I was able to burn the hobbyist Alpha OpenVMS ISO images to CD using linux. Debian Liunx - you have to install cdrskin and the command I used was $ cdrskin --devices -data ALPHA084.ISO This is on a DELL desktop with one CD/DVD drive, instead of --devices I could have used dev=/dev/sr0. I was able to mount and explore these CD's on the Alphaserver 1000a. Doug
Re: Help identify "multichip module"
On Mon, Feb 05, 2018 at 11:37:27AM +0100, Camiel Vanderhoeven wrote: > On Sat, Feb 03, 2018 at 06:49:57PM +0100, Pontus Pihlgren via cctalk > wrote: > > Hi > > > > I got this picture sent to me with zero context. Does anyone recognize > > what it is? > > > > http://www.update.uu.se/~pontus/slask/identify/mystery_chips.jpeg > > > > Thank you, > > Pontus. > > I have seen these before, in another life as an audio/video technician. These > plug into the video processor board on older Grass Valley equipment, like the > 100 and 200 series production switchers. I believe - but this is where I > enter the realm of speculation - they are ROMs containing the code for > different effects. The utility processor board has a DEC J11 processor on it. > > Camiel. > > > It looks like a pretty neat toy to play with: http://meci.com/electronics/grass-valley-group-video-production-switch-control-panel-100-n-frame-087610-00.html If you happen to stumble upon one... Cheers, Pontus.
Re: Help identify "multichip module"
On Mon, Feb 05, 2018 at 11:37:27AM +0100, Camiel Vanderhoeven wrote: > > I have seen these before, in another life as an audio/video technician. > These plug into the video processor board on older Grass Valley > equipment, like the 100 and 200 series production switchers. I believe - > but this is where I enter the realm of speculation - they are ROMs > containing the code for different effects. The utility processor board > has a DEC J11 processor on it. > > Camiel. > Thank you Camiel. In the bag of chips was also a J11. I guess we now know what has been scrapped. /P
