[Techtoolslist] 1101 & 1011 RAM?

[John Robertson]

On 2024-08-05 11:22 a.m., Joe Magiera wrote:
> I tried replying attaching a couple pictures, but I did not see it come
> through.  I'm guessing maybe because of the attachments being too large.  I
> posted pics of the chips in question here:
> https://missilecommand.org/misc/1101_1011_RAM.JPG
> https://missilecommand.org/misc/1011_1101_RAM.JPG
>
> See attached pics.  1101 were Intel's first RAM.  The top ones in the pics I
> think are National Semiconductor brand.  The bottom ones, no clue.  I
> suppose they could be 1101's too and someone made the mistake of putting the
> 1 in upside down on the stamp (see middle bottom).  I'm having a hard time
> finding anything definitive on 1011 RAM, so maybe that was the case.
>
> Joe

Got the photos in my email. Best to call them MM1101 and not just 1101 
as it is far easier to search for them then.

This Dynamic RAM is covered in the 1972 National MOS Integrated Circuits 
book. I think you can get that from bitsavers or archive.org, but if not 
I have a PDF copy that I found somewhere I can send you... This is a MOS 
device and as such uses +5 and -7 to -9VDC depending on the device. 
Might be best to check them using a Fluke  in circuit...

Good luck!

John :-#)#

>
> -----Original Message-----
> From: Techtoolslist [mailto:techtoolslist-bounces at flippers.com] On Behalf Of
> John Robertson via Techtoolslist
> Sent: Monday, August 5, 2024 11:58 AM
> To: techtoolslist at flippers.com
> Cc: John Robertson <jrr at flippers.com>
> Subject: Re: [Techtoolslist] 1101 & 1011 RAM?
>
> On 2024-08-05 8:01 a.m., Joe Magiera wrote:
>> Anyone know of any device or any way to test 1101 RAM and/or 1011 RAM?
>>
>>    
>>
>> Joe
>>
>>
>>
> What manufacturer and date code? I don't recall that number offhand...
>
> John :-#)#
>
> _______________________________________________
> Techtoolslist mailing list
> Techtoolslist at flippers.com
> https://pairlist7.pair.net/mailman/listinfo/techtoolslist
> FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment
> Archive site 2005-Current:
> https://seven.pairlist.net/pipermail/techtoolslist/
> Vectorlist Archives 1997/99 - 2016: https://www.vectorlist.org/
>
>