Hello All,
Does anyone have an old National Semiconductor memory data book lying around? I have found the problem with my second 32k memory board - 3 bad DRAM chips. This board is populated with MM5298N-3B chips. I can't find an online data sheet that talks about the speed grade (I'm assuming that's what the 3 is referring to). The manual for the board ( http://www.hartetechnologies.com/manuals/Northstar/NorthStar%2032k%20RAM-32… ) says that the RAM is 200ns access time. I can find a source for MM5298N-4B chips, but I don't know if the 4B is still fast enough. I'll replace the entire bank of 9 chips at the same time so that they are matched.
Thanks for any assistance.
Ian
Ian, I'm afraid my NatSemi data book only goes up to MM5290 (16Kx1 Dynamic)
but the '-3' variant is 200nS as is the MM5298-3 and it lists the '-4'
variant as 300nS. Unless I had no option I wouldn't use the slower chips
whereas the 150nS would do fine although without any real feel for the
tolerances of the chips, board design wait circuitry (if exists) or the
refresh controllers it is not really possible to say with any degree of
certainty.
Anyone have any specs on any of the several chips or controllers that were
used to bridge IDE HDDs to another interface such as PP, FW or USB. I'm
thinking of products of Shuttle Technology, Indigita, ASP, etc.
Alternatively, can anyone point me to an open source driver code for such
bridges, perhaps Linux?
Tom
This will be a long shot...
Do any of y'all happen to have PDF documentation for a Digital Equipment Corp. DECpos2 computer, model MT100-AA? This was a small Pentium PC made for point of sale applications. I found documentation online for an older 386SX based DECpos system, but nothing for the newer DECpos2 yet.
Yes, this is related to Other Stuff I've been asking about here recently. ;) In particular, I want to find out whether its onboard floppy controller can be disabled. The 386SX-based version does appear to have that option in its BIOS settings, according to the user/installation manual I found.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/
I'm trying to remember how to get a OpenVMS/VAX Hobbyist license. I have
the media. I have an account number for Encompass US, I just don't remember
where to get the license.
> I'm trying to put together a DOS system on which to run the ImageDisk
software, as found here:
> http://www.classiccmp.org/dunfield/img/index.htm
Here is a thread on my site about my Pentium III system dedicated to imaging
disks, plus a link to the class notes from the talk at the VCF East last
spring:
http://vintagecomputer.net/browse_thread.cfm?id=561
I am using a generic Pentium III, which will handle the Adaptec card you
have in place of the Catweasel I have.The drive controller of the Pentium
III has no issues with a 5 1/4" HD drive, which with an adapter can mimic a
77 track 8" drive. Note that I have a dual boot system, Dos 6 and Windows
2000. Works perfectly. Very little I can't image with this that is
image-able. I also intend to put in a Quad Density drive, but I have not
gotten around to it yet. The quad density I believe will look to the
Pentium Bios as a 720 3.5" drive.
In short, make your life easy, use a Pentium III with a compatible BIOS.
Bill
Hi guys,
I'm a long time lurker but this is my first to the list, If anyone
still running OS X on PowerPC Macintoshes is interested, I've started
building packages on Tiger 10.4.11 using pkgsrc & publishing them for
others to use.
I've written up a brief post on how to get started at
http://www.geeklan.co.uk/?p=1579 if you've not used pkgsrc before.
Packages are currently published at http://sevan.mit.edu/packages
Let me know if you experience any issues, the aim of this exercise is
to get familiar with building software & through that improve support
for Darwin in pkgsrc.
The number of published packages is growing (slowly), if there's
something you specifically need, it'll show up eventually as the
pkgsrc tree is built but feel free to email me off list if you'd like
to add something to build list beforehand.
Sevan / Venture37
