SPARCstation 20 with SCSI2SD

[alan at alanlee.org]

I'm not sure what the 'B' in the middle means (silicon rev?), but the 
DS12885 has been around for decades.  I use them the JR-IDE project.

-Alan


On 2018-12-01 17:47, Maciej W. Rozycki via cctalk wrote:
> On Tue, 27 Nov 2018, systems_glitch via cctalk wrote:
> 
>> I probably need to do a writeup on fully potted parts, like the 48T59 
>> and
>> DS1287.
> 
>  See a photo documentary here:
> <ftp://ftp.linux-mips.org/pub/linux/mips/people/macro/ds1287/> for my
> proposal of a DS1287 rework.
> 
>  I actually had a nasty surprise trying to rework a DS1287A, with a 
> date
> code indicating a clearly faked marking.  After removing the integrated
> coin cell the marking on the embedded IC revealed showed it wasn't even 
> a
> DS1287A originally as the IC was a DS12B885.  This is a part I haven't
> heard of existing, so I enquired Maxim, but they had no clue about it.  
> I
> suspect the DS12B885 was the core of the DS12B887 (wired differently 
> from
> both DS12887 and DS12887A), and the DS12B885 has never been marketed as 
> a
> part on its own.
> 
>   Maciej