DECstation Memory Upgrade

Tuesday 25th January 2011, 18:42 Posted by urbancamo

I cleaned the DECstation today and installed an additional nine 8 MB memory sticks to take the box to a maximum 120 MB.

DECstation with lid off. Six memory sticks on the left, CPU daughter board in the middle, power supply on the right. Three white turbochannel sockets can be seen, the graphics card has been removed from the far left slot. The IO logic is at the bottom of the motherboard.

DECstation

 

DECstation

 

The CPU daughter board. The CPU is at the far end with the heat sink.

DECstation

 

IO and glue logic. The Dallas backup battery can be seen as the large black box next to the second turbochannel socket. This contains a backup battery that will long since have expired. You can get the top off these with a bit of cutting, normally they contain a CR2032 watch battery. It's the same chip on each of the DECstation, VAXstation 4000/VLC and the DEC 3000/600 - they all need replacing!

DECstation

 

Top down view of the memory slots.

DECstation

 

Giving the graphics card a brush 'n' blast. This card is throwing an error on startup checks - I may swap it with a spare, although I've not noticed the error crop up in normal use.

DECstation

 

That is some stack of silicon! All 15 memory slots now populated.

DECstation

 

The retaining bracket ensures the memory stays put. The connectors really aren't that great, although the socket connectors on the memory cards do reduce the likelyhood of frying one with static electricity.

DECstation

 

View of the boot-up messages (the corruption around the Ultrix version message is because I'm viewing the log - this doesn't happen on boot up).

DECstation

 

Notice that the installed memory now reads 120 MB. Result!

DECstation