[Info-vax] terminal servers etc

[VAXman- at SendSpamHere.ORG]

In article <df4f40b1-e775-458f-a16f-3efb59b3b9b8 at t5g2000vba.googlegroups.com>, Rich Jordan <jordan at ccs4vms.com> writes:
>On Jan 8, 7:40=A0am, F H <fhs... at gmail.com> wrote:
>> For those who want to find a DECserver 90M on eBay or somewhere else:
>> please note that not all DECserver 90M terminal servers have a flash
>> memory card present!
>>
>> There are two or even three types of 90M devices:
>>
>> - Those without a flash card. They can be recognized by the absence of
>> an inscription on the front panel. They rely on MOP to download their
>> OS.
>> - Those with a 1 MB flash card. They have the inscription "1M Flash"
>> on the front panel. The OS is on that flash card but it takes several
>> minutes to decompress the OS on the flash card into memory. They will
>> download the OS over the network only when a special procedure is
>> followed at power-on time.
>> - It seems that a version exists with a 2 MB (or more) flash card.
>> This system boots stand-alone too and very fast because there is no
>> decompression to be done. I have however never seen this version.
>
>Are you sure about the no-flash models?  That doesn't show up in any
>of the networking catalogs I still have (though that predates the
>selloff of the networking division, now owned by VNETEK).  They did
>show 1 or 2MB FLASH models, and also early 1MB RAM and later 4MB RAM
>(for NAS software) but nothing in the 90M without flash boot
>capability.
>
>I need to open mine up and see what the flash looks like.  I'm pretty
>sure the RAM is just a standard 72 pin parity SIMM.

Let'sput this to rest.  I just opened one of my DECserver90Ms.

RAM is soldered on the board. 8xTI-TMS44400DC (1048576-WORD BY 4-BIT 
DYNAMIC RANDOM-ACCESS MEMORIES).  That comprises the 4MB of memory.
No SIMS, so there's no way to extend the memory.

The flash sits on a small daughter card approximately 1.25"x3" and the
flash is soldered on it.  4xAMD28F020 (2 Megabit (256 K x 8-Bit) CMOS 
12.0 Volt, Bulk Erase Flash Memory).


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