Integral RAM upgrade

[Tony Duell]

> >> Jos, busy finding the DRAM's in my "archive"
> > 
> > A it of advice if you're doing the upgrade. If, as I did, you decide to 
> > socket the new RAMs, you can used turned-pin sockets,
> 
> I tend to not use sockets in this case.
> I will test the boards after freeing the holes, test the 41256's 
> before use, but then I will just solder them. 

It's up to you. I've never had problems with turned pin sockets, so I 
used them, just in case one of the RAMs I pulled from an old PC memory 
board turned out to be dead or marginal. 

> 
> I am just fighting multiple 4116 failues in my Lilith's spare memory 
> boards, and these drams are soldered in.  It is a pain, but i believe 
> 41256 are less errorprone then those  3-voltage 4116's and I just dont 

I think you're right there. Those 3-rail chips didn't like it if the -5V 
line came up after the other 2, for exmaple...

> like sockets. 



> 
> BTW Lilith hardware and microcode docs are up on bitsavers, if you are 
> looking for some bedtime literature ! 

Thanks, I will take a look sometime. That's one machine I'd love to find, 
but there's little chance of that (perhaps fortuantely, I have no idea 
where I'd put one).

Incidentally, getting back to the HP Integral, if you ever find any 
software that usppoerts the 'second' serial port on the RS232 card, let 
me know. I assume you know about that little easter egg...

-tony