Re: WTB: 64K cache SIMM (72-pin)
On September 1, 2018 9:41:37 AM PDT, Cameron Kaiser via cctalk wrote: >> > Trying to restore an Alpha Micro ColdFire-based system, and it's >missing >> > its cache SIMM. It works without it, but it sure would be nice. AM >doesn't >> > have much info on it but it appears to be a 72-pin 64KB SIMM >(unknown >> > speed), same keying as 72-pin RAM SIMMs. >> > >> > I doubt this is a custom part and ISTR that PCs of around that time >used >> > something similar. If you've got something like this mouldering in >your >> > parts drawer, please advise. Thanks! >> > >> I have three devices which if I remember right were cache modules, >but >> they all appear to be 80 pin devices. >> Slightly longer pins than the typical 72-pin SIMMs, fit into a >vertical >> socket on the MB. Any chance you've got the pin count wrong? > >An excellent question, but it is exactly the same socket as the 72-pin >RAM >SIMMs below it. I even labouriously counted all the pins on the board >socket >this morning just in case I'd missed something, and it's 72. The >service >manual even warns against installing RAM there. > >Is this actually a *non*-standard thing? I know Apple had all kinds of >boffo >L2 cache configurations for the beige Power Macs but Apple's Apple and >certainly larger than Alpha Micro. > >-- > personal: >http://www.cameronkaiser.com/ -- >Cameron Kaiser * Floodgap Systems * www.floodgap.com * >ckai...@floodgap.com >-- Seen on hand dryer: "Push button for a message from your >congressman." - I had a regular Pentium motherboard with cache like that. The manual describes this as COAST for Cache On A Stick. The actual SIMM has gold fingers that are much longer than the ones found on regular DRAM SIMMs. I curiously tried putting a regular SIMM into a COAST slot and vice versa. It didn't work because of this length difference. -- David Griffith d...@661.org
Re: Novapalooza in 2 months...
I see what you mean... sorta like the DEC "Rainbow"? Bruce Ray Wild Hare Computer Systems, Inc. Boulder, Colorado USA b...@wildharecomputers.com ...preserving the Data General legacy: www.NovasAreForever.org On 8/31/2018 11:44 AM, Alan Frisbie via cctalk wrote: Bruce Ray wrote: > Really, the Nova is 50? Yup - so join us in celebrating the personal and > technical impact of this youngster.. I always found it amusing that Data General's computers were named after transitory phenomena: Nova, Supernova, Eclipse. Of course, in the grand scale of things, we all are. :-( Alan
Re: Thicknet/10base5 Test Segment: The Cable is In!
And, like many Allied Telesyn/Telesis products, NO POWER BRICK! An auto-switching supply is built right into the hub. Thanks, Jonathan On Sat, Sep 1, 2018 at 2:45 PM Cameron Kaiser via cctalk < cctalk@classiccmp.org> wrote: > > Speaking of AUI and hubs etc., any interest in a 10baseT hub with an AUI > port? > > Allied Telesyn/CentreCom MR820T > > I have (two of) the MR820TR, which has all of the above plus 10b2. Great > device, incredibly reliable, running non-stop for years. > > -- > personal: > http://www.cameronkaiser.com/ -- > Cameron Kaiser * Floodgap Systems * www.floodgap.com * > ckai...@floodgap.com > -- yankee hotel foxtrot. yankee hotel foxtrot. yankee hotel foxtrot. > konec. --- >
Re: Thicknet/10base5 Test Segment: The Cable is In!
> Speaking of AUI and hubs etc., any interest in a 10baseT hub with an AUI port? > Allied Telesyn/CentreCom MR820T I have (two of) the MR820TR, which has all of the above plus 10b2. Great device, incredibly reliable, running non-stop for years. -- personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckai...@floodgap.com -- yankee hotel foxtrot. yankee hotel foxtrot. yankee hotel foxtrot. konec. ---
Re: Thicknet/10base5 Test Segment: The Cable is In!
Speaking of AUI and hubs etc., any interest in a 10baseT hub with an AUI port? Allied Telesyn/CentreCom MR820T or IBM 8222-016 (AUI _and_ 10base-2) ? m - Original Message - From: "systems_glitch via cctalk" To: "Cameron Kaiser" ; "CCTalk" Sent: Friday, August 31, 2018 6:01 PM Subject: Re: Thicknet/10base5 Test Segment: The Cable is In! > Yeah, Allied Telesyn/Telesis made (and still makes!) really decent hardware > at a midrange price. I often recommend their gigabit and PoE switches for > cost-sensitive projects, especially where management isn't really needed. > > Thanks, > Jonathan > > On Fri, Aug 31, 2018 at 5:56 PM Cameron Kaiser via cctalk < > cctalk@classiccmp.org> wrote: > >> > Allied Telesis made a "multi port tap" that provided four AUI ports off a >> > single Ethernet tap. I don't know if it was a repeater/hub inside, or >> what. >> > It was much smaller than a DELNI or DEREP. >> >> Pretty sure I know the device you're talking about and I think it was >> a hub internally. I liked it a lot better than the DELNI. >> >> Come to think of it, I liked most of Allied Telesyn's stuff. I still have >> a 10Mbit hub of theirs handling the low speed systems and the 10b2 segment >> going to the HP 9000, and a whole mess of the transceivers which are >> periodically useful on AUI-only systems. >> >> -- >> personal: >> http://www.cameronkaiser.com/ -- >> Cameron Kaiser * Floodgap Systems * www.floodgap.com * >> ckai...@floodgap.com >> -- #include >> >>
Re: WTB: 64K cache SIMM (72-pin)
> > Trying to restore an Alpha Micro ColdFire-based system, and it's missing > > its cache SIMM. It works without it, but it sure would be nice. AM doesn't > > have much info on it but it appears to be a 72-pin 64KB SIMM (unknown > > speed), same keying as 72-pin RAM SIMMs. > > > > I doubt this is a custom part and ISTR that PCs of around that time used > > something similar. If you've got something like this mouldering in your > > parts drawer, please advise. Thanks! > > > I have three devices which if I remember right were cache modules, but > they all appear to be 80 pin devices. > Slightly longer pins than the typical 72-pin SIMMs, fit into a vertical > socket on the MB. Any chance you've got the pin count wrong? An excellent question, but it is exactly the same socket as the 72-pin RAM SIMMs below it. I even labouriously counted all the pins on the board socket this morning just in case I'd missed something, and it's 72. The service manual even warns against installing RAM there. Is this actually a *non*-standard thing? I know Apple had all kinds of boffo L2 cache configurations for the beige Power Macs but Apple's Apple and certainly larger than Alpha Micro. -- personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckai...@floodgap.com -- Seen on hand dryer: "Push button for a message from your congressman." -
PDP-11/04 on eBay
For those who didn't catch it: https://www.ebay.com/itm/202415330983 I have bought from this seller before (very happy with the results), but am not otherwise affiliated. The -11/04 is a nice UNIBUS starter/test machine (my UNIBUS board debug machine is an -11/04). The CPU is a single (hex) board, and it's really simple and straightforward - very easy to work on and fix. (You don't even need to put it on an extender card! :-) Depending on the backplane that's in the machine, it might be super-easy to upgrade to an -11/34 (if it's a DD11-P, as many /04's are, just pull the CPU card and plug in a set of /34 boards). Not sure what's up with the M105/M7821; they aren't standalone cards, but go with some other card (they are addressing and interrupt/vector functionality). No idea what it was, though... Noel
